./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.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/uthash-2.0.2/uthash_SFH_test10-3.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 fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 18:46:43,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 18:46:43,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 18:46:43,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 18:46:43,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 18:46:43,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 18:46:43,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 18:46:43,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 18:46:43,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 18:46:43,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 18:46:43,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 18:46:43,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 18:46:43,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 18:46:43,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 18:46:43,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 18:46:43,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 18:46:43,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 18:46:43,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 18:46:43,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 18:46:43,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 18:46:43,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 18:46:43,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 18:46:43,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 18:46:43,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 18:46:43,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 18:46:43,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 18:46:43,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 18:46:43,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 18:46:43,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 18:46:43,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 18:46:43,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 18:46:43,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 18:46:43,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 18:46:43,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 18:46:43,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 18:46:43,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 18:46:43,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 18:46:43,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 18:46:43,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 18:46:43,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 18:46:43,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 18:46:43,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-18 18:46:43,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 18:46:43,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 18:46:43,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 18:46:43,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 18:46:43,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 18:46:43,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 18:46:43,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 18:46:43,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 18:46:43,851 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 18:46:43,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 18:46:43,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 18:46:43,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 18:46:43,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 18:46:43,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 18:46:43,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 18:46:43,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 18:46:43,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 18:46:43,853 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 18:46:43,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 18:46:43,854 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 18:46:43,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 18:46:43,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 18:46:43,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 18:46:43,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 18:46:43,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 18:46:43,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 18:46:43,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 18:46:43,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 18:46:43,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 18:46:43,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 18:46:43,856 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 18:46:43,857 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 18:46:43,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 18:46:43,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 18:46:43,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae [2021-12-18 18:46:44,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 18:46:44,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 18:46:44,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 18:46:44,108 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 18:46:44,108 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 18:46:44,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2021-12-18 18:46:44,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87602c106/d4a31d7e8556448eb3f056880c7c35ec/FLAG9a0f8085d [2021-12-18 18:46:44,686 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 18:46:44,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2021-12-18 18:46:44,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87602c106/d4a31d7e8556448eb3f056880c7c35ec/FLAG9a0f8085d [2021-12-18 18:46:44,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87602c106/d4a31d7e8556448eb3f056880c7c35ec [2021-12-18 18:46:44,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 18:46:45,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 18:46:45,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 18:46:45,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 18:46:45,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 18:46:45,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:46:44" (1/1) ... [2021-12-18 18:46:45,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bbc3a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45, skipping insertion in model container [2021-12-18 18:46:45,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 06:46:44" (1/1) ... [2021-12-18 18:46:45,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 18:46:45,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 18:46:45,360 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/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2021-12-18 18:46:45,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 18:46:45,549 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 18:46:45,574 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/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2021-12-18 18:46:45,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 18:46:45,696 INFO L208 MainTranslator]: Completed translation [2021-12-18 18:46:45,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45 WrapperNode [2021-12-18 18:46:45,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 18:46:45,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 18:46:45,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 18:46:45,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 18:46:45,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45" (1/1) ... [2021-12-18 18:46:45,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45" (1/1) ... [2021-12-18 18:46:45,805 INFO L137 Inliner]: procedures = 177, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2467 [2021-12-18 18:46:45,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 18:46:45,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 18:46:45,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 18:46:45,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 18:46:45,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45" (1/1) ... [2021-12-18 18:46:45,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45" (1/1) ... [2021-12-18 18:46:45,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45" (1/1) ... [2021-12-18 18:46:45,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45" (1/1) ... [2021-12-18 18:46:45,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45" (1/1) ... [2021-12-18 18:46:45,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45" (1/1) ... [2021-12-18 18:46:45,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45" (1/1) ... [2021-12-18 18:46:45,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 18:46:45,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 18:46:45,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 18:46:45,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 18:46:45,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45" (1/1) ... [2021-12-18 18:46:45,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 18:46:45,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:46:46,013 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) [2021-12-18 18:46:46,059 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 [2021-12-18 18:46:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-18 18:46:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-18 18:46:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 18:46:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 18:46:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 18:46:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 18:46:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-18 18:46:46,070 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-18 18:46:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 18:46:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 18:46:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 18:46:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 18:46:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-18 18:46:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 18:46:46,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 18:46:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 18:46:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 18:46:46,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 18:46:46,330 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 18:46:46,331 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 18:46:47,461 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 18:46:47,474 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 18:46:47,474 INFO L301 CfgBuilder]: Removed 168 assume(true) statements. [2021-12-18 18:46:47,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:46:47 BoogieIcfgContainer [2021-12-18 18:46:47,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 18:46:47,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 18:46:47,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 18:46:47,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 18:46:47,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 06:46:44" (1/3) ... [2021-12-18 18:46:47,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@163948be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:46:47, skipping insertion in model container [2021-12-18 18:46:47,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 06:46:45" (2/3) ... [2021-12-18 18:46:47,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@163948be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 06:46:47, skipping insertion in model container [2021-12-18 18:46:47,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 06:46:47" (3/3) ... [2021-12-18 18:46:47,484 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-3.i [2021-12-18 18:46:47,489 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 18:46:47,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 18:46:47,533 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 18:46:47,547 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 [2021-12-18 18:46:47,548 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 18:46:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 478 states, 459 states have (on average 1.7124183006535947) internal successors, (786), 464 states have internal predecessors, (786), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 18:46:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 18:46:47,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:46:47,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:46:47,578 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:46:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:46:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1002051803, now seen corresponding path program 1 times [2021-12-18 18:46:47,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:46:47,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827912769] [2021-12-18 18:46:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:47,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:46:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:46:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:46:47,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:46:47,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827912769] [2021-12-18 18:46:47,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827912769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:46:47,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:46:47,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 18:46:47,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677707938] [2021-12-18 18:46:47,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:46:47,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 18:46:47,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:46:47,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 18:46:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 18:46:47,759 INFO L87 Difference]: Start difference. First operand has 478 states, 459 states have (on average 1.7124183006535947) internal successors, (786), 464 states have internal predecessors, (786), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:46:47,818 INFO L93 Difference]: Finished difference Result 954 states and 1634 transitions. [2021-12-18 18:46:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 18:46:47,820 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-18 18:46:47,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:46:47,835 INFO L225 Difference]: With dead ends: 954 [2021-12-18 18:46:47,835 INFO L226 Difference]: Without dead ends: 424 [2021-12-18 18:46:47,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 18:46:47,845 INFO L933 BasicCegarLoop]: 638 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, 638 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 [2021-12-18 18:46:47,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:46:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-18 18:46:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2021-12-18 18:46:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 406 states have (on average 1.3251231527093597) internal successors, (538), 411 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 18:46:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 565 transitions. [2021-12-18 18:46:47,917 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 565 transitions. Word has length 13 [2021-12-18 18:46:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:46:47,917 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 565 transitions. [2021-12-18 18:46:47,917 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 565 transitions. [2021-12-18 18:46:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 18:46:47,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:46:47,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:46:47,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 18:46:47,924 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:46:47,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:46:47,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1116117503, now seen corresponding path program 1 times [2021-12-18 18:46:47,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:46:47,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188068364] [2021-12-18 18:46:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:47,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:46:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:46:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:46:48,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:46:48,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188068364] [2021-12-18 18:46:48,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188068364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:46:48,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:46:48,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:46:48,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895226328] [2021-12-18 18:46:48,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:46:48,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:46:48,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:46:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:46:48,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:46:48,084 INFO L87 Difference]: Start difference. First operand 424 states and 565 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:48,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:46:48,539 INFO L93 Difference]: Finished difference Result 745 states and 997 transitions. [2021-12-18 18:46:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:46:48,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-18 18:46:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:46:48,544 INFO L225 Difference]: With dead ends: 745 [2021-12-18 18:46:48,544 INFO L226 Difference]: Without dead ends: 499 [2021-12-18 18:46:48,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:46:48,545 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 96 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 18:46:48,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1479 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 18:46:48,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-12-18 18:46:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 426. [2021-12-18 18:46:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 408 states have (on average 1.3235294117647058) internal successors, (540), 413 states have internal predecessors, (540), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 18:46:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 567 transitions. [2021-12-18 18:46:48,558 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 567 transitions. Word has length 48 [2021-12-18 18:46:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:46:48,559 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 567 transitions. [2021-12-18 18:46:48,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 567 transitions. [2021-12-18 18:46:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 18:46:48,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:46:48,569 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:46:48,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 18:46:48,569 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:46:48,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:46:48,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1476092237, now seen corresponding path program 1 times [2021-12-18 18:46:48,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:46:48,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479386331] [2021-12-18 18:46:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:48,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:46:48,656 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:46:48,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654386802] [2021-12-18 18:46:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:48,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:48,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:46:48,659 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) [2021-12-18 18:46:48,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 18:46:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:46:49,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:46:49,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:46:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:46:49,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:46:49,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:46:49,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479386331] [2021-12-18 18:46:49,415 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:46:49,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654386802] [2021-12-18 18:46:49,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654386802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:46:49,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:46:49,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:46:49,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67549656] [2021-12-18 18:46:49,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:46:49,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:46:49,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:46:49,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:46:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:46:49,417 INFO L87 Difference]: Start difference. First operand 426 states and 567 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:46:49,477 INFO L93 Difference]: Finished difference Result 869 states and 1161 transitions. [2021-12-18 18:46:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:46:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 18:46:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:46:49,479 INFO L225 Difference]: With dead ends: 869 [2021-12-18 18:46:49,479 INFO L226 Difference]: Without dead ends: 447 [2021-12-18 18:46:49,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:46:49,481 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:46:49,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:46:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-18 18:46:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 446. [2021-12-18 18:46:49,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 428 states have (on average 1.308411214953271) internal successors, (560), 433 states have internal predecessors, (560), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 18:46:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 587 transitions. [2021-12-18 18:46:49,491 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 587 transitions. Word has length 101 [2021-12-18 18:46:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:46:49,491 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 587 transitions. [2021-12-18 18:46:49,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:49,492 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 587 transitions. [2021-12-18 18:46:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 18:46:49,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:46:49,493 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:46:49,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 18:46:49,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:49,712 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:46:49,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:46:49,712 INFO L85 PathProgramCache]: Analyzing trace with hash -418254159, now seen corresponding path program 1 times [2021-12-18 18:46:49,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:46:49,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388200713] [2021-12-18 18:46:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:49,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:46:49,809 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:46:49,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563228964] [2021-12-18 18:46:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:49,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:49,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:46:49,813 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) [2021-12-18 18:46:49,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 18:46:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:46:50,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:46:50,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:46:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 18:46:50,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:46:50,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:46:50,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388200713] [2021-12-18 18:46:50,501 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:46:50,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563228964] [2021-12-18 18:46:50,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563228964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:46:50,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:46:50,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:46:50,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256161079] [2021-12-18 18:46:50,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:46:50,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:46:50,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:46:50,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:46:50,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:46:50,502 INFO L87 Difference]: Start difference. First operand 446 states and 587 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:46:50,563 INFO L93 Difference]: Finished difference Result 701 states and 934 transitions. [2021-12-18 18:46:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:46:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 18:46:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:46:50,565 INFO L225 Difference]: With dead ends: 701 [2021-12-18 18:46:50,565 INFO L226 Difference]: Without dead ends: 467 [2021-12-18 18:46:50,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:46:50,566 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:46:50,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:46:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-18 18:46:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 466. [2021-12-18 18:46:50,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 448 states have (on average 1.2946428571428572) internal successors, (580), 453 states have internal predecessors, (580), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 18:46:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 607 transitions. [2021-12-18 18:46:50,574 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 607 transitions. Word has length 101 [2021-12-18 18:46:50,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:46:50,575 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 607 transitions. [2021-12-18 18:46:50,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:50,575 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 607 transitions. [2021-12-18 18:46:50,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 18:46:50,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:46:50,576 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:46:50,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-18 18:46:50,791 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,SelfDestructingSolverStorable3 [2021-12-18 18:46:50,792 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:46:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:46:50,792 INFO L85 PathProgramCache]: Analyzing trace with hash -637108877, now seen corresponding path program 1 times [2021-12-18 18:46:50,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:46:50,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099684655] [2021-12-18 18:46:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:50,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:46:50,876 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:46:50,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102237522] [2021-12-18 18:46:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:50,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:50,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:46:50,878 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) [2021-12-18 18:46:50,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 18:46:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:46:51,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:46:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:46:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:46:51,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:46:51,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:46:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099684655] [2021-12-18 18:46:51,676 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:46:51,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102237522] [2021-12-18 18:46:51,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102237522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:46:51,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:46:51,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:46:51,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626127097] [2021-12-18 18:46:51,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:46:51,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:46:51,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:46:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:46:51,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:46:51,678 INFO L87 Difference]: Start difference. First operand 466 states and 607 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:46:51,736 INFO L93 Difference]: Finished difference Result 1004 states and 1314 transitions. [2021-12-18 18:46:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:46:51,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 18:46:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:46:51,739 INFO L225 Difference]: With dead ends: 1004 [2021-12-18 18:46:51,739 INFO L226 Difference]: Without dead ends: 542 [2021-12-18 18:46:51,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:46:51,741 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 506 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:46:51,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1460 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:46:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-12-18 18:46:51,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 452. [2021-12-18 18:46:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 434 states have (on average 1.2880184331797235) internal successors, (559), 439 states have internal predecessors, (559), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 18:46:51,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 586 transitions. [2021-12-18 18:46:51,750 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 586 transitions. Word has length 101 [2021-12-18 18:46:51,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:46:51,750 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 586 transitions. [2021-12-18 18:46:51,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 586 transitions. [2021-12-18 18:46:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 18:46:51,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:46:51,751 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:46:51,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 18:46:51,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:51,968 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:46:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:46:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash 416687617, now seen corresponding path program 1 times [2021-12-18 18:46:51,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:46:51,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255639674] [2021-12-18 18:46:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:51,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:46:52,026 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:46:52,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026285144] [2021-12-18 18:46:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:52,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:52,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:46:52,028 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) [2021-12-18 18:46:52,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 18:46:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:46:52,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:46:52,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:46:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 18:46:52,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:46:52,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:46:52,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255639674] [2021-12-18 18:46:52,794 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:46:52,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026285144] [2021-12-18 18:46:52,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026285144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:46:52,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:46:52,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:46:52,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249200030] [2021-12-18 18:46:52,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:46:52,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:46:52,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:46:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:46:52,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:46:52,796 INFO L87 Difference]: Start difference. First operand 452 states and 586 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:46:52,848 INFO L93 Difference]: Finished difference Result 675 states and 882 transitions. [2021-12-18 18:46:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:46:52,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 18:46:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:46:52,850 INFO L225 Difference]: With dead ends: 675 [2021-12-18 18:46:52,851 INFO L226 Difference]: Without dead ends: 439 [2021-12-18 18:46:52,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:46:52,852 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 287 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:46:52,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1308 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:46:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-18 18:46:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 438. [2021-12-18 18:46:52,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 420 states have (on average 1.2809523809523808) internal successors, (538), 425 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 18:46:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 565 transitions. [2021-12-18 18:46:52,860 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 565 transitions. Word has length 101 [2021-12-18 18:46:52,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:46:52,861 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 565 transitions. [2021-12-18 18:46:52,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:52,861 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 565 transitions. [2021-12-18 18:46:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 18:46:52,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:46:52,862 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:46:52,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 18:46:53,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:53,075 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:46:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:46:53,076 INFO L85 PathProgramCache]: Analyzing trace with hash 893903923, now seen corresponding path program 1 times [2021-12-18 18:46:53,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:46:53,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110928615] [2021-12-18 18:46:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:53,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:46:53,141 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:46:53,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419065957] [2021-12-18 18:46:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:53,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:53,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:46:53,160 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) [2021-12-18 18:46:53,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 18:46:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:46:53,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 18:46:53,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:46:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 18:46:54,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:46:54,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:46:54,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110928615] [2021-12-18 18:46:54,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:46:54,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419065957] [2021-12-18 18:46:54,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419065957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:46:54,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:46:54,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:46:54,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928980570] [2021-12-18 18:46:54,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:46:54,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:46:54,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:46:54,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:46:54,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:46:54,089 INFO L87 Difference]: Start difference. First operand 438 states and 565 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:46:54,137 INFO L93 Difference]: Finished difference Result 1102 states and 1424 transitions. [2021-12-18 18:46:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:46:54,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 18:46:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:46:54,143 INFO L225 Difference]: With dead ends: 1102 [2021-12-18 18:46:54,143 INFO L226 Difference]: Without dead ends: 668 [2021-12-18 18:46:54,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:46:54,145 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 249 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:46:54,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1129 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:46:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-18 18:46:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 664. [2021-12-18 18:46:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2792511700468019) internal successors, (820), 646 states have internal predecessors, (820), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-18 18:46:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 857 transitions. [2021-12-18 18:46:54,163 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 857 transitions. Word has length 101 [2021-12-18 18:46:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:46:54,163 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 857 transitions. [2021-12-18 18:46:54,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 18:46:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 857 transitions. [2021-12-18 18:46:54,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 18:46:54,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:46:54,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:46:54,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 18:46:54,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:54,389 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:46:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:46:54,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1884551189, now seen corresponding path program 1 times [2021-12-18 18:46:54,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:46:54,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308707965] [2021-12-18 18:46:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:54,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:46:54,421 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:46:54,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020088401] [2021-12-18 18:46:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:54,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:54,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:46:54,432 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) [2021-12-18 18:46:54,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 18:46:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:46:54,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 18:46:54,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:46:55,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 18:46:55,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 18:46:55,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 18:46:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:46:55,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:46:55,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:46:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308707965] [2021-12-18 18:46:55,179 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:46:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020088401] [2021-12-18 18:46:55,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020088401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:46:55,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:46:55,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 18:46:55,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135015548] [2021-12-18 18:46:55,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:46:55,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 18:46:55,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:46:55,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 18:46:55,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:46:55,180 INFO L87 Difference]: Start difference. First operand 664 states and 857 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:46:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:46:55,702 INFO L93 Difference]: Finished difference Result 1238 states and 1596 transitions. [2021-12-18 18:46:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 18:46:55,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2021-12-18 18:46:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:46:55,704 INFO L225 Difference]: With dead ends: 1238 [2021-12-18 18:46:55,704 INFO L226 Difference]: Without dead ends: 664 [2021-12-18 18:46:55,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 18:46:55,706 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 96 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 18:46:55,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1857 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 18:46:55,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-18 18:46:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2021-12-18 18:46:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2776911076443058) internal successors, (819), 646 states have internal predecessors, (819), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-18 18:46:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 856 transitions. [2021-12-18 18:46:55,717 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 856 transitions. Word has length 116 [2021-12-18 18:46:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:46:55,717 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 856 transitions. [2021-12-18 18:46:55,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:46:55,717 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 856 transitions. [2021-12-18 18:46:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-18 18:46:55,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:46:55,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:46:55,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 18:46:55,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:55,932 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:46:55,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:46:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash -227193184, now seen corresponding path program 1 times [2021-12-18 18:46:55,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:46:55,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385584810] [2021-12-18 18:46:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:55,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:46:56,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:46:56,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436496864] [2021-12-18 18:46:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:56,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:56,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:46:56,043 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) [2021-12-18 18:46:56,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 18:46:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:46:56,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:46:56,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:46:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:46:57,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:46:57,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:46:57,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385584810] [2021-12-18 18:46:57,110 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:46:57,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436496864] [2021-12-18 18:46:57,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436496864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:46:57,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:46:57,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:46:57,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234405029] [2021-12-18 18:46:57,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:46:57,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:46:57,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:46:57,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:46:57,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:46:57,114 INFO L87 Difference]: Start difference. First operand 664 states and 856 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:46:57,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:46:57,175 INFO L93 Difference]: Finished difference Result 1352 states and 1753 transitions. [2021-12-18 18:46:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:46:57,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-18 18:46:57,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:46:57,179 INFO L225 Difference]: With dead ends: 1352 [2021-12-18 18:46:57,180 INFO L226 Difference]: Without dead ends: 706 [2021-12-18 18:46:57,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:46:57,183 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 9 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:46:57,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1047 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:46:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-12-18 18:46:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2021-12-18 18:46:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 681 states have (on average 1.261380323054332) internal successors, (859), 686 states have internal predecessors, (859), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-18 18:46:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 896 transitions. [2021-12-18 18:46:57,212 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 896 transitions. Word has length 163 [2021-12-18 18:46:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:46:57,212 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 896 transitions. [2021-12-18 18:46:57,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:46:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 896 transitions. [2021-12-18 18:46:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-18 18:46:57,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:46:57,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:46:57,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 18:46:57,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:57,448 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:46:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:46:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2136648478, now seen corresponding path program 1 times [2021-12-18 18:46:57,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:46:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729154598] [2021-12-18 18:46:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:57,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:46:57,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:46:57,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823944658] [2021-12-18 18:46:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:57,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:57,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:46:57,542 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) [2021-12-18 18:46:57,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 18:46:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:46:58,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2222 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 18:46:58,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:46:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:46:58,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:46:58,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:46:58,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729154598] [2021-12-18 18:46:58,686 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:46:58,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823944658] [2021-12-18 18:46:58,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823944658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:46:58,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:46:58,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:46:58,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001735718] [2021-12-18 18:46:58,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:46:58,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:46:58,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:46:58,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:46:58,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:46:58,687 INFO L87 Difference]: Start difference. First operand 704 states and 896 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:46:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:46:58,768 INFO L93 Difference]: Finished difference Result 1346 states and 1718 transitions. [2021-12-18 18:46:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:46:58,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-18 18:46:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:46:58,771 INFO L225 Difference]: With dead ends: 1346 [2021-12-18 18:46:58,771 INFO L226 Difference]: Without dead ends: 678 [2021-12-18 18:46:58,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:46:58,773 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 492 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:46:58,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 1099 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:46:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-18 18:46:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 676. [2021-12-18 18:46:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 653 states have (on average 1.2511485451761102) internal successors, (817), 658 states have internal predecessors, (817), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-18 18:46:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 854 transitions. [2021-12-18 18:46:58,787 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 854 transitions. Word has length 163 [2021-12-18 18:46:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:46:58,787 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 854 transitions. [2021-12-18 18:46:58,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:46:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 854 transitions. [2021-12-18 18:46:58,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-18 18:46:58,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:46:58,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:46:58,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-18 18:46:59,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-18 18:46:59,013 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:46:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:46:59,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1984933676, now seen corresponding path program 1 times [2021-12-18 18:46:59,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:46:59,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263843939] [2021-12-18 18:46:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:59,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:46:59,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:46:59,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978792961] [2021-12-18 18:46:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:46:59,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:46:59,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:46:59,128 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:46:59,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 18:47:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:47:00,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 18:47:00,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:47:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 18:47:00,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:47:00,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:47:00,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263843939] [2021-12-18 18:47:00,469 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:47:00,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978792961] [2021-12-18 18:47:00,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978792961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:47:00,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:47:00,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 18:47:00,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168479783] [2021-12-18 18:47:00,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:47:00,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 18:47:00,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:47:00,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 18:47:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:47:00,471 INFO L87 Difference]: Start difference. First operand 676 states and 854 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:47:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:47:00,530 INFO L93 Difference]: Finished difference Result 1533 states and 1962 transitions. [2021-12-18 18:47:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 18:47:00,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-18 18:47:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:47:00,534 INFO L225 Difference]: With dead ends: 1533 [2021-12-18 18:47:00,535 INFO L226 Difference]: Without dead ends: 915 [2021-12-18 18:47:00,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 18:47:00,538 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 220 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:47:00,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1064 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:47:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-12-18 18:47:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 813. [2021-12-18 18:47:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 787 states have (on average 1.2617534942820838) internal successors, (993), 792 states have internal predecessors, (993), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-18 18:47:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1036 transitions. [2021-12-18 18:47:00,558 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1036 transitions. Word has length 163 [2021-12-18 18:47:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:47:00,559 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1036 transitions. [2021-12-18 18:47:00,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 18:47:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1036 transitions. [2021-12-18 18:47:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-18 18:47:00,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:47:00,560 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:47:00,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 18:47:00,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:47:00,772 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:47:00,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:47:00,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1090168527, now seen corresponding path program 1 times [2021-12-18 18:47:00,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:47:00,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519495299] [2021-12-18 18:47:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:47:00,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:47:00,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:47:00,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750333767] [2021-12-18 18:47:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:47:00,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:47:00,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:47:00,831 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:47:00,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 18:47:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:47:01,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 18:47:01,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:47:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 18:47:02,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:47:02,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:47:02,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519495299] [2021-12-18 18:47:02,033 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:47:02,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750333767] [2021-12-18 18:47:02,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750333767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:47:02,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:47:02,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:47:02,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178416661] [2021-12-18 18:47:02,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:47:02,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:47:02,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:47:02,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:47:02,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:47:02,034 INFO L87 Difference]: Start difference. First operand 813 states and 1036 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:47:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:47:02,362 INFO L93 Difference]: Finished difference Result 1342 states and 1716 transitions. [2021-12-18 18:47:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:47:02,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 178 [2021-12-18 18:47:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:47:02,365 INFO L225 Difference]: With dead ends: 1342 [2021-12-18 18:47:02,365 INFO L226 Difference]: Without dead ends: 665 [2021-12-18 18:47:02,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:47:02,366 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 835 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 18:47:02,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 644 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 18:47:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-18 18:47:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2021-12-18 18:47:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 644 states have (on average 1.2468944099378882) internal successors, (803), 649 states have internal predecessors, (803), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-18 18:47:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 836 transitions. [2021-12-18 18:47:02,378 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 836 transitions. Word has length 178 [2021-12-18 18:47:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:47:02,379 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 836 transitions. [2021-12-18 18:47:02,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:47:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 836 transitions. [2021-12-18 18:47:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-18 18:47:02,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:47:02,381 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:47:02,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 18:47:02,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-18 18:47:02,596 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:47:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:47:02,596 INFO L85 PathProgramCache]: Analyzing trace with hash -559500548, now seen corresponding path program 1 times [2021-12-18 18:47:02,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:47:02,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350865097] [2021-12-18 18:47:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:47:02,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:47:02,650 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:47:02,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906300346] [2021-12-18 18:47:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:47:02,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:47:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:47:02,652 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:47:02,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 18:47:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:47:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 18:47:33,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:47:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 18:47:33,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 18:47:33,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:47:33,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350865097] [2021-12-18 18:47:33,557 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:47:33,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906300346] [2021-12-18 18:47:33,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906300346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 18:47:33,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 18:47:33,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 18:47:33,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747898926] [2021-12-18 18:47:33,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 18:47:33,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 18:47:33,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:47:33,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 18:47:33,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 18:47:33,559 INFO L87 Difference]: Start difference. First operand 665 states and 836 transitions. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:47:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:47:33,605 INFO L93 Difference]: Finished difference Result 1281 states and 1624 transitions. [2021-12-18 18:47:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 18:47:33,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 185 [2021-12-18 18:47:33,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:47:33,608 INFO L225 Difference]: With dead ends: 1281 [2021-12-18 18:47:33,608 INFO L226 Difference]: Without dead ends: 668 [2021-12-18 18:47:33,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 18:47:33,610 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 2 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 18:47:33,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1607 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 18:47:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-18 18:47:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2021-12-18 18:47:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 646 states have (on average 1.2476780185758514) internal successors, (806), 652 states have internal predecessors, (806), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-18 18:47:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 842 transitions. [2021-12-18 18:47:33,624 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 842 transitions. Word has length 185 [2021-12-18 18:47:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:47:33,625 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 842 transitions. [2021-12-18 18:47:33,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 18:47:33,625 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 842 transitions. [2021-12-18 18:47:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-18 18:47:33,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:47:33,626 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:47:33,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 18:47:33,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-18 18:47:33,840 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:47:33,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:47:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 23822080, now seen corresponding path program 1 times [2021-12-18 18:47:33,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:47:33,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630310082] [2021-12-18 18:47:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:47:33,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:47:33,892 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:47:33,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655524961] [2021-12-18 18:47:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:47:33,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:47:33,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:47:33,893 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:47:33,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 18:47:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 18:47:38,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 18:47:38,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:47:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 18:47:38,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:47:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-18 18:47:38,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:47:38,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630310082] [2021-12-18 18:47:38,723 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:47:38,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655524961] [2021-12-18 18:47:38,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655524961] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:47:38,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:47:38,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 18:47:38,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146410059] [2021-12-18 18:47:38,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:47:38,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 18:47:38,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:47:38,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 18:47:38,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 18:47:38,725 INFO L87 Difference]: Start difference. First operand 668 states and 842 transitions. Second operand has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-18 18:47:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:47:38,866 INFO L93 Difference]: Finished difference Result 1295 states and 1653 transitions. [2021-12-18 18:47:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 18:47:38,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 189 [2021-12-18 18:47:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:47:38,870 INFO L225 Difference]: With dead ends: 1295 [2021-12-18 18:47:38,870 INFO L226 Difference]: Without dead ends: 677 [2021-12-18 18:47:38,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-12-18 18:47:38,872 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 16 mSDsluCounter, 3169 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3704 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 18:47:38,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 3704 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 18:47:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-12-18 18:47:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2021-12-18 18:47:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 654 states have (on average 1.2507645259938838) internal successors, (818), 660 states have internal predecessors, (818), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2021-12-18 18:47:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 857 transitions. [2021-12-18 18:47:38,892 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 857 transitions. Word has length 189 [2021-12-18 18:47:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:47:38,893 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 857 transitions. [2021-12-18 18:47:38,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-18 18:47:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 857 transitions. [2021-12-18 18:47:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-18 18:47:38,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:47:38,895 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:47:38,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 18:47:39,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-18 18:47:39,112 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:47:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:47:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash -575376004, now seen corresponding path program 2 times [2021-12-18 18:47:39,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:47:39,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579027535] [2021-12-18 18:47:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:47:39,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:47:39,174 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:47:39,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774267378] [2021-12-18 18:47:39,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 18:47:39,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:47:39,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:47:39,176 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:47:39,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 18:47:48,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 18:47:48,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 18:47:48,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 18:47:48,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 18:47:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 79 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 18:47:48,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 18:47:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-18 18:47:49,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 18:47:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579027535] [2021-12-18 18:47:49,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 18:47:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774267378] [2021-12-18 18:47:49,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774267378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 18:47:49,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 18:47:49,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-12-18 18:47:49,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611614566] [2021-12-18 18:47:49,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 18:47:49,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 18:47:49,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 18:47:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 18:47:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-18 18:47:49,185 INFO L87 Difference]: Start difference. First operand 677 states and 857 transitions. Second operand has 14 states, 14 states have (on average 13.428571428571429) internal successors, (188), 14 states have internal predecessors, (188), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-18 18:47:49,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 18:47:49,650 INFO L93 Difference]: Finished difference Result 1319 states and 1691 transitions. [2021-12-18 18:47:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 18:47:49,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.428571428571429) internal successors, (188), 14 states have internal predecessors, (188), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 197 [2021-12-18 18:47:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 18:47:49,653 INFO L225 Difference]: With dead ends: 1319 [2021-12-18 18:47:49,653 INFO L226 Difference]: Without dead ends: 688 [2021-12-18 18:47:49,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-12-18 18:47:49,657 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 30 mSDsluCounter, 4762 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 5299 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 18:47:49,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 5299 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 18:47:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-12-18 18:47:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 683. [2021-12-18 18:47:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 660 states have (on average 1.2484848484848485) internal successors, (824), 666 states have internal predecessors, (824), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-18 18:47:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 860 transitions. [2021-12-18 18:47:49,675 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 860 transitions. Word has length 197 [2021-12-18 18:47:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 18:47:49,675 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 860 transitions. [2021-12-18 18:47:49,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.428571428571429) internal successors, (188), 14 states have internal predecessors, (188), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-18 18:47:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 860 transitions. [2021-12-18 18:47:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-18 18:47:49,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 18:47:49,677 INFO L514 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 18:47:49,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 18:47:49,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-18 18:47:49,888 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 18:47:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 18:47:49,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1395108100, now seen corresponding path program 3 times [2021-12-18 18:47:49,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 18:47:49,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728925640] [2021-12-18 18:47:49,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 18:47:49,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 18:47:49,950 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 18:47:49,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309157607] [2021-12-18 18:47:49,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 18:47:49,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 18:47:49,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 18:47:49,951 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 18:47:49,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process Killed by 15