./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 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/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:31:43,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:31:43,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:31:43,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:31:43,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:31:43,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:31:43,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:31:43,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:31:43,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:31:43,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:31:43,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:31:43,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:31:43,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:31:43,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:31:43,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:31:43,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:31:43,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:31:43,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:31:43,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:31:43,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:31:43,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:31:43,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:31:43,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:31:43,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:31:43,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:31:43,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:31:43,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:31:43,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:31:43,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:31:43,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:31:43,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:31:43,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:31:43,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:31:43,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:31:43,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:31:43,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:31:43,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:31:43,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:31:43,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:31:43,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:31:43,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:31:43,911 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:31:43,940 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:31:43,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:31:43,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:31:43,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:31:43,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:31:43,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:31:43,944 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:31:43,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:31:43,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:31:43,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:31:43,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:31:43,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:31:43,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:31:43,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:31:43,946 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:31:43,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:31:43,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:31:43,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:31:43,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:31:43,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:31:43,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:31:43,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:31:43,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:31:43,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:31:43,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:31:43,948 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:31:43,948 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:31:43,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:31:43,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:31:43,948 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2021-11-06 14:31:44,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:31:44,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:31:44,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:31:44,199 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:31:44,200 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:31:44,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-06 14:31:44,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abf528e3/88d44597da554b429c731edba94882f6/FLAGcd9fc8cec [2021-11-06 14:31:44,859 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:31:44,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-06 14:31:44,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abf528e3/88d44597da554b429c731edba94882f6/FLAGcd9fc8cec [2021-11-06 14:31:45,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abf528e3/88d44597da554b429c731edba94882f6 [2021-11-06 14:31:45,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:31:45,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:31:45,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:31:45,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:31:45,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:31:45,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:31:45" (1/1) ... [2021-11-06 14:31:45,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0ce8d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:45, skipping insertion in model container [2021-11-06 14:31:45,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:31:45" (1/1) ... [2021-11-06 14:31:45,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:31:45,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:31:45,827 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-11-06 14:31:46,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:31:46,226 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:31:46,356 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-11-06 14:31:46,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:31:46,533 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:31:46,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46 WrapperNode [2021-11-06 14:31:46,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:31:46,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:31:46,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:31:46,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:31:46,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46" (1/1) ... [2021-11-06 14:31:46,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46" (1/1) ... [2021-11-06 14:31:46,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:31:46,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:31:46,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:31:46,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:31:46,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46" (1/1) ... [2021-11-06 14:31:46,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46" (1/1) ... [2021-11-06 14:31:46,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46" (1/1) ... [2021-11-06 14:31:46,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46" (1/1) ... [2021-11-06 14:31:46,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46" (1/1) ... [2021-11-06 14:31:46,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46" (1/1) ... [2021-11-06 14:31:46,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46" (1/1) ... [2021-11-06 14:31:46,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:31:46,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:31:46,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:31:46,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:31:46,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46" (1/1) ... [2021-11-06 14:31:46,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:31:46,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:31:46,979 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) [2021-11-06 14:31:47,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:31:47,026 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-06 14:31:47,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:31:47,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:31:47,013 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 [2021-11-06 14:31:47,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:31:47,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:31:47,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:31:47,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:31:47,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:31:47,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:31:47,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:31:47,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:31:47,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:31:47,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:31:47,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:31:47,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:31:49,355 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:31:49,356 INFO L299 CfgBuilder]: Removed 1048 assume(true) statements. [2021-11-06 14:31:49,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:31:49 BoogieIcfgContainer [2021-11-06 14:31:49,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:31:49,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:31:49,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:31:49,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:31:49,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:31:45" (1/3) ... [2021-11-06 14:31:49,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64cec0b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:31:49, skipping insertion in model container [2021-11-06 14:31:49,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:46" (2/3) ... [2021-11-06 14:31:49,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64cec0b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:31:49, skipping insertion in model container [2021-11-06 14:31:49,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:31:49" (3/3) ... [2021-11-06 14:31:49,364 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-06 14:31:49,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:31:49,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:31:49,401 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:31:49,405 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 [2021-11-06 14:31:49,405 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:31:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 1019 states, 1017 states have (on average 1.5024582104228121) internal successors, (1528), 1018 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-06 14:31:49,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:49,435 INFO L513 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] [2021-11-06 14:31:49,435 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:49,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1191082698, now seen corresponding path program 1 times [2021-11-06 14:31:49,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:49,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835291159] [2021-11-06 14:31:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:49,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:31:49,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:49,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835291159] [2021-11-06 14:31:49,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835291159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:49,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:49,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:49,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262901921] [2021-11-06 14:31:49,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:49,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:49,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:49,699 INFO L87 Difference]: Start difference. First operand has 1019 states, 1017 states have (on average 1.5024582104228121) internal successors, (1528), 1018 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:49,911 INFO L93 Difference]: Finished difference Result 2969 states and 4469 transitions. [2021-11-06 14:31:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-06 14:31:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:49,926 INFO L225 Difference]: With dead ends: 2969 [2021-11-06 14:31:49,927 INFO L226 Difference]: Without dead ends: 1941 [2021-11-06 14:31:49,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:49,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-11-06 14:31:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1941. [2021-11-06 14:31:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 1.3871134020618556) internal successors, (2691), 1940 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2691 transitions. [2021-11-06 14:31:50,003 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2691 transitions. Word has length 27 [2021-11-06 14:31:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:50,003 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2691 transitions. [2021-11-06 14:31:50,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2691 transitions. [2021-11-06 14:31:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-06 14:31:50,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:50,007 INFO L513 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] [2021-11-06 14:31:50,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:31:50,007 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1908761624, now seen corresponding path program 1 times [2021-11-06 14:31:50,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:50,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099410909] [2021-11-06 14:31:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:50,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:50,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:31:50,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985061771] [2021-11-06 14:31:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:50,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:50,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:31:50,044 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) [2021-11-06 14:31:50,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 14:31:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:50,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 14:31:50,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:31:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:31:50,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:50,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099410909] [2021-11-06 14:31:50,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:31:50,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985061771] [2021-11-06 14:31:50,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985061771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:50,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:50,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:31:50,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636225399] [2021-11-06 14:31:50,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:50,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:50,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:50,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:50,450 INFO L87 Difference]: Start difference. First operand 1941 states and 2691 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:50,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:50,495 INFO L93 Difference]: Finished difference Result 3854 states and 5349 transitions. [2021-11-06 14:31:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:50,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-06 14:31:50,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:50,502 INFO L225 Difference]: With dead ends: 3854 [2021-11-06 14:31:50,502 INFO L226 Difference]: Without dead ends: 1941 [2021-11-06 14:31:50,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-11-06 14:31:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1941. [2021-11-06 14:31:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 1.3865979381443299) internal successors, (2690), 1940 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2690 transitions. [2021-11-06 14:31:50,548 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2690 transitions. Word has length 33 [2021-11-06 14:31:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:50,548 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2690 transitions. [2021-11-06 14:31:50,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2690 transitions. [2021-11-06 14:31:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-06 14:31:50,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:50,550 INFO L513 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] [2021-11-06 14:31:50,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-06 14:31:50,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:50,766 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:50,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:50,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1321955610, now seen corresponding path program 1 times [2021-11-06 14:31:50,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:50,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194494843] [2021-11-06 14:31:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:50,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:50,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:31:50,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541143943] [2021-11-06 14:31:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:50,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:50,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:31:50,822 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) [2021-11-06 14:31:50,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 14:31:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:51,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 14:31:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:31:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:31:51,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:51,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194494843] [2021-11-06 14:31:51,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:31:51,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541143943] [2021-11-06 14:31:51,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541143943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:51,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:51,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:31:51,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573615375] [2021-11-06 14:31:51,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:31:51,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:31:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:51,308 INFO L87 Difference]: Start difference. First operand 1941 states and 2690 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:51,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:51,697 INFO L93 Difference]: Finished difference Result 5765 states and 8003 transitions. [2021-11-06 14:31:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:31:51,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-06 14:31:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:51,724 INFO L225 Difference]: With dead ends: 5765 [2021-11-06 14:31:51,725 INFO L226 Difference]: Without dead ends: 3833 [2021-11-06 14:31:51,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:31:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-11-06 14:31:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3681. [2021-11-06 14:31:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3680 states have (on average 1.389945652173913) internal successors, (5115), 3680 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 5115 transitions. [2021-11-06 14:31:51,820 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 5115 transitions. Word has length 33 [2021-11-06 14:31:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:51,820 INFO L470 AbstractCegarLoop]: Abstraction has 3681 states and 5115 transitions. [2021-11-06 14:31:51,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 5115 transitions. [2021-11-06 14:31:51,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 14:31:51,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:51,825 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:31:51,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-06 14:31:52,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-06 14:31:52,046 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:52,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash -148593795, now seen corresponding path program 1 times [2021-11-06 14:31:52,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:52,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940254136] [2021-11-06 14:31:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:52,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:31:52,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:52,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940254136] [2021-11-06 14:31:52,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940254136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:52,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:52,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:52,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508733774] [2021-11-06 14:31:52,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:52,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:52,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:52,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:52,113 INFO L87 Difference]: Start difference. First operand 3681 states and 5115 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:52,282 INFO L93 Difference]: Finished difference Result 9529 states and 13314 transitions. [2021-11-06 14:31:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:52,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-06 14:31:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:52,300 INFO L225 Difference]: With dead ends: 9529 [2021-11-06 14:31:52,300 INFO L226 Difference]: Without dead ends: 5876 [2021-11-06 14:31:52,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5876 states. [2021-11-06 14:31:52,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5876 to 5855. [2021-11-06 14:31:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5855 states, 5854 states have (on average 1.4016057396651862) internal successors, (8205), 5854 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5855 states to 5855 states and 8205 transitions. [2021-11-06 14:31:52,430 INFO L78 Accepts]: Start accepts. Automaton has 5855 states and 8205 transitions. Word has length 53 [2021-11-06 14:31:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:52,431 INFO L470 AbstractCegarLoop]: Abstraction has 5855 states and 8205 transitions. [2021-11-06 14:31:52,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 5855 states and 8205 transitions. [2021-11-06 14:31:52,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-06 14:31:52,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:52,435 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:31:52,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:31:52,435 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash 836191375, now seen corresponding path program 1 times [2021-11-06 14:31:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:52,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568478241] [2021-11-06 14:31:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:52,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:31:52,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:52,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568478241] [2021-11-06 14:31:52,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568478241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:52,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:52,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:52,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020187601] [2021-11-06 14:31:52,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:52,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:52,509 INFO L87 Difference]: Start difference. First operand 5855 states and 8205 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:52,760 INFO L93 Difference]: Finished difference Result 15443 states and 21659 transitions. [2021-11-06 14:31:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:52,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-06 14:31:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:52,793 INFO L225 Difference]: With dead ends: 15443 [2021-11-06 14:31:52,794 INFO L226 Difference]: Without dead ends: 9616 [2021-11-06 14:31:52,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:52,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9616 states. [2021-11-06 14:31:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9616 to 9581. [2021-11-06 14:31:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9580 states have (on average 1.4031315240083508) internal successors, (13442), 9580 states have internal predecessors, (13442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 13442 transitions. [2021-11-06 14:31:53,075 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 13442 transitions. Word has length 57 [2021-11-06 14:31:53,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:53,080 INFO L470 AbstractCegarLoop]: Abstraction has 9581 states and 13442 transitions. [2021-11-06 14:31:53,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 13442 transitions. [2021-11-06 14:31:53,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-06 14:31:53,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:53,087 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:31:53,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:31:53,087 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:53,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1796362686, now seen corresponding path program 1 times [2021-11-06 14:31:53,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:53,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324477] [2021-11-06 14:31:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:53,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:31:53,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:53,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324477] [2021-11-06 14:31:53,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:53,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:53,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:53,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30093365] [2021-11-06 14:31:53,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:53,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:53,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:53,153 INFO L87 Difference]: Start difference. First operand 9581 states and 13442 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:53,542 INFO L93 Difference]: Finished difference Result 24423 states and 34142 transitions. [2021-11-06 14:31:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:53,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-06 14:31:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:53,593 INFO L225 Difference]: With dead ends: 24423 [2021-11-06 14:31:53,594 INFO L226 Difference]: Without dead ends: 14870 [2021-11-06 14:31:53,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14870 states. [2021-11-06 14:31:53,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14870 to 14805. [2021-11-06 14:31:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14805 states, 14804 states have (on average 1.3943528776006484) internal successors, (20642), 14804 states have internal predecessors, (20642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14805 states to 14805 states and 20642 transitions. [2021-11-06 14:31:53,950 INFO L78 Accepts]: Start accepts. Automaton has 14805 states and 20642 transitions. Word has length 68 [2021-11-06 14:31:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:53,952 INFO L470 AbstractCegarLoop]: Abstraction has 14805 states and 20642 transitions. [2021-11-06 14:31:53,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 14805 states and 20642 transitions. [2021-11-06 14:31:53,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-06 14:31:53,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:53,958 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:53,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:31:53,959 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:53,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:53,959 INFO L85 PathProgramCache]: Analyzing trace with hash 139183937, now seen corresponding path program 1 times [2021-11-06 14:31:53,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:53,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381146941] [2021-11-06 14:31:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:53,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:53,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:31:53,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838733248] [2021-11-06 14:31:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:53,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:53,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:31:53,994 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) [2021-11-06 14:31:53,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 14:31:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:54,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:31:54,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:31:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:31:54,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:54,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381146941] [2021-11-06 14:31:54,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:31:54,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838733248] [2021-11-06 14:31:54,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838733248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:54,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:54,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:31:54,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408578986] [2021-11-06 14:31:54,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:31:54,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:31:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:31:54,462 INFO L87 Difference]: Start difference. First operand 14805 states and 20642 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:54,829 INFO L93 Difference]: Finished difference Result 29635 states and 41327 transitions. [2021-11-06 14:31:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:31:54,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-06 14:31:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:54,861 INFO L225 Difference]: With dead ends: 29635 [2021-11-06 14:31:54,862 INFO L226 Difference]: Without dead ends: 14834 [2021-11-06 14:31:54,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14834 states. [2021-11-06 14:31:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14834 to 14808. [2021-11-06 14:31:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14808 states, 14807 states have (on average 1.393732693996083) internal successors, (20637), 14807 states have internal predecessors, (20637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14808 states to 14808 states and 20637 transitions. [2021-11-06 14:31:55,293 INFO L78 Accepts]: Start accepts. Automaton has 14808 states and 20637 transitions. Word has length 70 [2021-11-06 14:31:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:55,293 INFO L470 AbstractCegarLoop]: Abstraction has 14808 states and 20637 transitions. [2021-11-06 14:31:55,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:55,294 INFO L276 IsEmpty]: Start isEmpty. Operand 14808 states and 20637 transitions. [2021-11-06 14:31:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-06 14:31:55,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:55,300 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:55,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-06 14:31:55,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:55,519 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1015277715, now seen corresponding path program 1 times [2021-11-06 14:31:55,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:55,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025659001] [2021-11-06 14:31:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:55,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:55,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:31:55,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294600706] [2021-11-06 14:31:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:55,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:55,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:31:55,556 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) [2021-11-06 14:31:55,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 14:31:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:55,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:31:55,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:31:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:31:56,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:56,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025659001] [2021-11-06 14:31:56,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:31:56,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294600706] [2021-11-06 14:31:56,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294600706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:56,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:56,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:56,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348752503] [2021-11-06 14:31:56,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:31:56,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:31:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:31:56,157 INFO L87 Difference]: Start difference. First operand 14808 states and 20637 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:56,380 INFO L93 Difference]: Finished difference Result 14829 states and 20660 transitions. [2021-11-06 14:31:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:31:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-06 14:31:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:56,412 INFO L225 Difference]: With dead ends: 14829 [2021-11-06 14:31:56,412 INFO L226 Difference]: Without dead ends: 14821 [2021-11-06 14:31:56,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:31:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14821 states. [2021-11-06 14:31:56,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14821 to 14809. [2021-11-06 14:31:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14809 states, 14808 states have (on average 1.3937061048082118) internal successors, (20638), 14808 states have internal predecessors, (20638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 20638 transitions. [2021-11-06 14:31:56,808 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 20638 transitions. Word has length 71 [2021-11-06 14:31:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:56,809 INFO L470 AbstractCegarLoop]: Abstraction has 14809 states and 20638 transitions. [2021-11-06 14:31:56,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 20638 transitions. [2021-11-06 14:31:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-06 14:31:56,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:56,819 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:56,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 14:31:57,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:57,038 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:57,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2032495438, now seen corresponding path program 1 times [2021-11-06 14:31:57,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:57,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991660667] [2021-11-06 14:31:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:57,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:57,064 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:31:57,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117718001] [2021-11-06 14:31:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:57,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:31:57,080 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) [2021-11-06 14:31:57,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 14:31:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:57,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:31:57,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:31:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:31:57,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:57,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991660667] [2021-11-06 14:31:57,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:31:57,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117718001] [2021-11-06 14:31:57,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117718001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:31:57,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:31:57,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-06 14:31:57,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060495980] [2021-11-06 14:31:57,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:31:57,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:57,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:31:57,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:57,687 INFO L87 Difference]: Start difference. First operand 14809 states and 20638 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:57,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:57,955 INFO L93 Difference]: Finished difference Result 14842 states and 20675 transitions. [2021-11-06 14:31:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:31:57,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-06 14:31:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:57,989 INFO L225 Difference]: With dead ends: 14842 [2021-11-06 14:31:57,989 INFO L226 Difference]: Without dead ends: 14834 [2021-11-06 14:31:57,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14834 states. [2021-11-06 14:31:58,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14834 to 14822. [2021-11-06 14:31:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14822 states, 14821 states have (on average 1.3934957155387626) internal successors, (20653), 14821 states have internal predecessors, (20653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14822 states to 14822 states and 20653 transitions. [2021-11-06 14:31:58,346 INFO L78 Accepts]: Start accepts. Automaton has 14822 states and 20653 transitions. Word has length 75 [2021-11-06 14:31:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:58,346 INFO L470 AbstractCegarLoop]: Abstraction has 14822 states and 20653 transitions. [2021-11-06 14:31:58,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 14822 states and 20653 transitions. [2021-11-06 14:31:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-06 14:31:58,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:58,354 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:58,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 14:31:58,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:58,576 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash -594566109, now seen corresponding path program 1 times [2021-11-06 14:31:58,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:58,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576800369] [2021-11-06 14:31:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:58,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:58,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:31:58,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061368144] [2021-11-06 14:31:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:58,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:58,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:31:58,609 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) [2021-11-06 14:31:58,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 14:31:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:59,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 14:31:59,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:31:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:31:59,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:59,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576800369] [2021-11-06 14:31:59,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:31:59,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061368144] [2021-11-06 14:31:59,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061368144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:59,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:59,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:59,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446157538] [2021-11-06 14:31:59,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:59,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:59,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:59,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:59,209 INFO L87 Difference]: Start difference. First operand 14822 states and 20653 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:59,544 INFO L93 Difference]: Finished difference Result 22130 states and 30869 transitions. [2021-11-06 14:31:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:59,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-06 14:31:59,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:59,565 INFO L225 Difference]: With dead ends: 22130 [2021-11-06 14:31:59,565 INFO L226 Difference]: Without dead ends: 7319 [2021-11-06 14:31:59,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2021-11-06 14:31:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 7319. [2021-11-06 14:31:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7319 states, 7318 states have (on average 1.3925936048100573) internal successors, (10191), 7318 states have internal predecessors, (10191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7319 states to 7319 states and 10191 transitions. [2021-11-06 14:31:59,723 INFO L78 Accepts]: Start accepts. Automaton has 7319 states and 10191 transitions. Word has length 77 [2021-11-06 14:31:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:59,723 INFO L470 AbstractCegarLoop]: Abstraction has 7319 states and 10191 transitions. [2021-11-06 14:31:59,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7319 states and 10191 transitions. [2021-11-06 14:31:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 14:31:59,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:59,729 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:59,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-06 14:31:59,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:59,948 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:59,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:59,948 INFO L85 PathProgramCache]: Analyzing trace with hash 800069969, now seen corresponding path program 2 times [2021-11-06 14:31:59,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:59,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572366680] [2021-11-06 14:31:59,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:59,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:59,969 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:31:59,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151732090] [2021-11-06 14:31:59,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:31:59,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:59,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:31:59,971 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) [2021-11-06 14:31:59,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 14:32:00,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:32:00,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:32:00,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 14:32:00,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:32:00,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:00,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572366680] [2021-11-06 14:32:00,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:00,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151732090] [2021-11-06 14:32:00,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151732090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:00,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:32:00,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-06 14:32:00,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914489387] [2021-11-06 14:32:00,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:32:00,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:00,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:32:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:32:00,688 INFO L87 Difference]: Start difference. First operand 7319 states and 10191 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:00,996 INFO L93 Difference]: Finished difference Result 7352 states and 10228 transitions. [2021-11-06 14:32:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:32:00,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-06 14:32:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:01,011 INFO L225 Difference]: With dead ends: 7352 [2021-11-06 14:32:01,012 INFO L226 Difference]: Without dead ends: 7344 [2021-11-06 14:32:01,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:32:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7344 states. [2021-11-06 14:32:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7344 to 7332. [2021-11-06 14:32:01,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7332 states, 7331 states have (on average 1.3921702359841768) internal successors, (10206), 7331 states have internal predecessors, (10206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7332 states to 7332 states and 10206 transitions. [2021-11-06 14:32:01,144 INFO L78 Accepts]: Start accepts. Automaton has 7332 states and 10206 transitions. Word has length 79 [2021-11-06 14:32:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:01,145 INFO L470 AbstractCegarLoop]: Abstraction has 7332 states and 10206 transitions. [2021-11-06 14:32:01,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 7332 states and 10206 transitions. [2021-11-06 14:32:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 14:32:01,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:01,150 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:01,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:01,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:01,363 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1293666704, now seen corresponding path program 3 times [2021-11-06 14:32:01,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:01,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742553889] [2021-11-06 14:32:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:01,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:01,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:01,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456220051] [2021-11-06 14:32:01,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:32:01,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:01,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:01,404 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) [2021-11-06 14:32:01,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 14:32:01,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:32:01,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:32:01,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 14:32:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-06 14:32:02,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:02,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742553889] [2021-11-06 14:32:02,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:02,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456220051] [2021-11-06 14:32:02,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456220051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:02,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:02,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:32:02,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865052894] [2021-11-06 14:32:02,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:32:02,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:02,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:32:02,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:32:02,087 INFO L87 Difference]: Start difference. First operand 7332 states and 10206 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:02,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:02,686 INFO L93 Difference]: Finished difference Result 32963 states and 46118 transitions. [2021-11-06 14:32:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:32:02,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-06 14:32:02,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:02,735 INFO L225 Difference]: With dead ends: 32963 [2021-11-06 14:32:02,736 INFO L226 Difference]: Without dead ends: 25708 [2021-11-06 14:32:02,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:32:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25708 states. [2021-11-06 14:32:03,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25708 to 7460. [2021-11-06 14:32:03,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7460 states, 7459 states have (on average 1.3854404075613354) internal successors, (10334), 7459 states have internal predecessors, (10334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7460 states to 7460 states and 10334 transitions. [2021-11-06 14:32:03,061 INFO L78 Accepts]: Start accepts. Automaton has 7460 states and 10334 transitions. Word has length 83 [2021-11-06 14:32:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:03,061 INFO L470 AbstractCegarLoop]: Abstraction has 7460 states and 10334 transitions. [2021-11-06 14:32:03,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 7460 states and 10334 transitions. [2021-11-06 14:32:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-06 14:32:03,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:03,068 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:03,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:03,288 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,SelfDestructingSolverStorable11 [2021-11-06 14:32:03,288 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:03,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1443099562, now seen corresponding path program 1 times [2021-11-06 14:32:03,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:03,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524235520] [2021-11-06 14:32:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:03,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:03,308 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:03,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517213573] [2021-11-06 14:32:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:03,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:03,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:03,324 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) [2021-11-06 14:32:03,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-06 14:32:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:03,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 14:32:03,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 14:32:03,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:03,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524235520] [2021-11-06 14:32:03,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:03,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517213573] [2021-11-06 14:32:03,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517213573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:03,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:03,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:32:03,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218116588] [2021-11-06 14:32:03,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:32:03,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:03,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:32:03,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:03,953 INFO L87 Difference]: Start difference. First operand 7460 states and 10334 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:04,223 INFO L93 Difference]: Finished difference Result 17255 states and 24077 transitions. [2021-11-06 14:32:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:32:04,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-06 14:32:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:04,238 INFO L225 Difference]: With dead ends: 17255 [2021-11-06 14:32:04,238 INFO L226 Difference]: Without dead ends: 9872 [2021-11-06 14:32:04,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9872 states. [2021-11-06 14:32:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9872 to 9824. [2021-11-06 14:32:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9824 states, 9823 states have (on average 1.3982490074315381) internal successors, (13735), 9823 states have internal predecessors, (13735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9824 states to 9824 states and 13735 transitions. [2021-11-06 14:32:04,556 INFO L78 Accepts]: Start accepts. Automaton has 9824 states and 13735 transitions. Word has length 85 [2021-11-06 14:32:04,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:04,556 INFO L470 AbstractCegarLoop]: Abstraction has 9824 states and 13735 transitions. [2021-11-06 14:32:04,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 9824 states and 13735 transitions. [2021-11-06 14:32:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-06 14:32:04,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:04,562 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:04,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:04,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-06 14:32:04,775 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:04,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2139623262, now seen corresponding path program 1 times [2021-11-06 14:32:04,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:04,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667674207] [2021-11-06 14:32:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:04,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:04,813 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:04,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331372872] [2021-11-06 14:32:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:04,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:04,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:04,814 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) [2021-11-06 14:32:04,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-06 14:32:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:05,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:32:05,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-06 14:32:05,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:05,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667674207] [2021-11-06 14:32:05,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:05,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331372872] [2021-11-06 14:32:05,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331372872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:05,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:05,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:32:05,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047878841] [2021-11-06 14:32:05,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:32:05,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:05,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:32:05,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:05,355 INFO L87 Difference]: Start difference. First operand 9824 states and 13735 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:05,846 INFO L93 Difference]: Finished difference Result 23433 states and 32820 transitions. [2021-11-06 14:32:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:32:05,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-06 14:32:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:05,884 INFO L225 Difference]: With dead ends: 23433 [2021-11-06 14:32:05,885 INFO L226 Difference]: Without dead ends: 18351 [2021-11-06 14:32:05,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18351 states. [2021-11-06 14:32:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18351 to 10000. [2021-11-06 14:32:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10000 states, 9999 states have (on average 1.3912391239123911) internal successors, (13911), 9999 states have internal predecessors, (13911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10000 states to 10000 states and 13911 transitions. [2021-11-06 14:32:06,380 INFO L78 Accepts]: Start accepts. Automaton has 10000 states and 13911 transitions. Word has length 85 [2021-11-06 14:32:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:06,381 INFO L470 AbstractCegarLoop]: Abstraction has 10000 states and 13911 transitions. [2021-11-06 14:32:06,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 10000 states and 13911 transitions. [2021-11-06 14:32:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 14:32:06,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:06,387 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:06,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:06,608 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,SelfDestructingSolverStorable13 [2021-11-06 14:32:06,609 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:06,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:06,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1583742504, now seen corresponding path program 1 times [2021-11-06 14:32:06,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:06,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522578485] [2021-11-06 14:32:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:06,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:06,644 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:06,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909674496] [2021-11-06 14:32:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:06,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:06,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:06,646 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) [2021-11-06 14:32:06,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-06 14:32:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:07,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 14:32:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:32:07,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:07,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522578485] [2021-11-06 14:32:07,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:07,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909674496] [2021-11-06 14:32:07,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909674496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:07,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:32:07,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-06 14:32:07,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686565872] [2021-11-06 14:32:07,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:32:07,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:07,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:32:07,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:32:07,415 INFO L87 Difference]: Start difference. First operand 10000 states and 13911 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:07,911 INFO L93 Difference]: Finished difference Result 10033 states and 13948 transitions. [2021-11-06 14:32:07,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:32:07,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-06 14:32:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:07,926 INFO L225 Difference]: With dead ends: 10033 [2021-11-06 14:32:07,927 INFO L226 Difference]: Without dead ends: 10025 [2021-11-06 14:32:07,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:32:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10025 states. [2021-11-06 14:32:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10025 to 10013. [2021-11-06 14:32:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10013 states, 10012 states have (on average 1.3909308829404714) internal successors, (13926), 10012 states have internal predecessors, (13926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10013 states to 10013 states and 13926 transitions. [2021-11-06 14:32:08,262 INFO L78 Accepts]: Start accepts. Automaton has 10013 states and 13926 transitions. Word has length 86 [2021-11-06 14:32:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:08,262 INFO L470 AbstractCegarLoop]: Abstraction has 10013 states and 13926 transitions. [2021-11-06 14:32:08,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:08,263 INFO L276 IsEmpty]: Start isEmpty. Operand 10013 states and 13926 transitions. [2021-11-06 14:32:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 14:32:08,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:08,270 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:08,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-06 14:32:08,480 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,SelfDestructingSolverStorable14 [2021-11-06 14:32:08,481 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash 400414663, now seen corresponding path program 2 times [2021-11-06 14:32:08,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:08,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105341280] [2021-11-06 14:32:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:08,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:08,548 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:08,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297591957] [2021-11-06 14:32:08,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:32:08,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:08,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:08,568 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) [2021-11-06 14:32:08,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-06 14:32:09,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:32:09,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:32:09,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 14:32:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:32:09,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:09,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105341280] [2021-11-06 14:32:09,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:09,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297591957] [2021-11-06 14:32:09,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297591957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:09,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:32:09,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-06 14:32:09,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382534232] [2021-11-06 14:32:09,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:32:09,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:09,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:32:09,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:32:09,527 INFO L87 Difference]: Start difference. First operand 10013 states and 13926 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:10,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:10,007 INFO L93 Difference]: Finished difference Result 10046 states and 13963 transitions. [2021-11-06 14:32:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 14:32:10,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-06 14:32:10,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:10,022 INFO L225 Difference]: With dead ends: 10046 [2021-11-06 14:32:10,023 INFO L226 Difference]: Without dead ends: 10038 [2021-11-06 14:32:10,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:32:10,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10038 states. [2021-11-06 14:32:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10038 to 10026. [2021-11-06 14:32:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10026 states, 10025 states have (on average 1.3906234413965086) internal successors, (13941), 10025 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10026 states to 10026 states and 13941 transitions. [2021-11-06 14:32:10,406 INFO L78 Accepts]: Start accepts. Automaton has 10026 states and 13941 transitions. Word has length 90 [2021-11-06 14:32:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:10,409 INFO L470 AbstractCegarLoop]: Abstraction has 10026 states and 13941 transitions. [2021-11-06 14:32:10,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 10026 states and 13941 transitions. [2021-11-06 14:32:10,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-06 14:32:10,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:10,421 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:10,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:10,635 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,SelfDestructingSolverStorable15 [2021-11-06 14:32:10,635 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:10,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash 948029926, now seen corresponding path program 3 times [2021-11-06 14:32:10,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:10,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660853087] [2021-11-06 14:32:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:10,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:10,685 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:10,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463733181] [2021-11-06 14:32:10,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:32:10,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:10,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:10,688 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) [2021-11-06 14:32:10,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-06 14:32:11,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:32:11,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:32:11,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-06 14:32:11,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-06 14:32:11,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:11,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660853087] [2021-11-06 14:32:11,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:11,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463733181] [2021-11-06 14:32:11,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463733181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:11,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:11,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 14:32:11,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192435859] [2021-11-06 14:32:11,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:32:11,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:32:11,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:32:11,776 INFO L87 Difference]: Start difference. First operand 10026 states and 13941 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:16,504 INFO L93 Difference]: Finished difference Result 106303 states and 150520 transitions. [2021-11-06 14:32:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-06 14:32:16,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-06 14:32:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:16,720 INFO L225 Difference]: With dead ends: 106303 [2021-11-06 14:32:16,720 INFO L226 Difference]: Without dead ends: 96354 [2021-11-06 14:32:16,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=236, Invalid=634, Unknown=0, NotChecked=0, Total=870 [2021-11-06 14:32:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96354 states. [2021-11-06 14:32:17,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96354 to 10122. [2021-11-06 14:32:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10122 states, 10121 states have (on average 1.380199585021243) internal successors, (13969), 10121 states have internal predecessors, (13969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10122 states to 10122 states and 13969 transitions. [2021-11-06 14:32:17,991 INFO L78 Accepts]: Start accepts. Automaton has 10122 states and 13969 transitions. Word has length 94 [2021-11-06 14:32:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:17,991 INFO L470 AbstractCegarLoop]: Abstraction has 10122 states and 13969 transitions. [2021-11-06 14:32:17,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 10122 states and 13969 transitions. [2021-11-06 14:32:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-06 14:32:17,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:17,999 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:18,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:18,206 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,SelfDestructingSolverStorable16 [2021-11-06 14:32:18,206 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:18,207 INFO L85 PathProgramCache]: Analyzing trace with hash -504904357, now seen corresponding path program 1 times [2021-11-06 14:32:18,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:18,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566696214] [2021-11-06 14:32:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:18,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:18,228 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:18,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887514607] [2021-11-06 14:32:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:18,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:18,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:18,229 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) [2021-11-06 14:32:18,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-06 14:32:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:18,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:32:18,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-06 14:32:19,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:19,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566696214] [2021-11-06 14:32:19,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:19,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887514607] [2021-11-06 14:32:19,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887514607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:19,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:19,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:32:19,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80769124] [2021-11-06 14:32:19,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:32:19,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:32:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:32:19,023 INFO L87 Difference]: Start difference. First operand 10122 states and 13969 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:20,260 INFO L93 Difference]: Finished difference Result 24012 states and 33087 transitions. [2021-11-06 14:32:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:32:20,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-06 14:32:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:20,277 INFO L225 Difference]: With dead ends: 24012 [2021-11-06 14:32:20,277 INFO L226 Difference]: Without dead ends: 13485 [2021-11-06 14:32:20,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:32:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13485 states. [2021-11-06 14:32:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13485 to 9609. [2021-11-06 14:32:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9609 states, 9608 states have (on average 1.363030807660283) internal successors, (13096), 9608 states have internal predecessors, (13096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9609 states to 9609 states and 13096 transitions. [2021-11-06 14:32:20,765 INFO L78 Accepts]: Start accepts. Automaton has 9609 states and 13096 transitions. Word has length 95 [2021-11-06 14:32:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:20,766 INFO L470 AbstractCegarLoop]: Abstraction has 9609 states and 13096 transitions. [2021-11-06 14:32:20,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 9609 states and 13096 transitions. [2021-11-06 14:32:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-06 14:32:20,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:20,775 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:20,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:20,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:20,992 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1913703476, now seen corresponding path program 1 times [2021-11-06 14:32:20,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:20,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503405920] [2021-11-06 14:32:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:20,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:21,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:21,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756448698] [2021-11-06 14:32:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:21,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:21,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:21,016 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:21,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-06 14:32:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-06 14:32:21,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:32:21,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:21,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503405920] [2021-11-06 14:32:21,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:21,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756448698] [2021-11-06 14:32:21,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756448698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:21,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:32:21,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-06 14:32:21,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144612018] [2021-11-06 14:32:21,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:32:21,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:21,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:32:21,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:32:21,992 INFO L87 Difference]: Start difference. First operand 9609 states and 13096 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:23,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:23,062 INFO L93 Difference]: Finished difference Result 9642 states and 13133 transitions. [2021-11-06 14:32:23,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:32:23,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-06 14:32:23,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:23,075 INFO L225 Difference]: With dead ends: 9642 [2021-11-06 14:32:23,075 INFO L226 Difference]: Without dead ends: 9634 [2021-11-06 14:32:23,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:32:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9634 states. [2021-11-06 14:32:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9634 to 9622. [2021-11-06 14:32:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9622 states, 9621 states have (on average 1.3627481550774347) internal successors, (13111), 9621 states have internal predecessors, (13111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9622 states to 9622 states and 13111 transitions. [2021-11-06 14:32:23,608 INFO L78 Accepts]: Start accepts. Automaton has 9622 states and 13111 transitions. Word has length 99 [2021-11-06 14:32:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:23,608 INFO L470 AbstractCegarLoop]: Abstraction has 9622 states and 13111 transitions. [2021-11-06 14:32:23,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 9622 states and 13111 transitions. [2021-11-06 14:32:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 14:32:23,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:23,618 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:23,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:23,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:23,832 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1321966443, now seen corresponding path program 2 times [2021-11-06 14:32:23,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:23,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912330776] [2021-11-06 14:32:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:23,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:23,850 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:23,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794302717] [2021-11-06 14:32:23,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:32:23,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:23,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:23,865 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:23,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-06 14:32:24,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:32:24,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:32:24,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 14:32:24,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:32:24,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:24,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912330776] [2021-11-06 14:32:24,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:24,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794302717] [2021-11-06 14:32:24,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794302717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:24,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:32:24,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-06 14:32:24,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230756769] [2021-11-06 14:32:24,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:32:24,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:24,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:32:24,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:32:24,945 INFO L87 Difference]: Start difference. First operand 9622 states and 13111 transitions. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:25,916 INFO L93 Difference]: Finished difference Result 9655 states and 13148 transitions. [2021-11-06 14:32:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 14:32:25,916 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-06 14:32:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:25,930 INFO L225 Difference]: With dead ends: 9655 [2021-11-06 14:32:25,931 INFO L226 Difference]: Without dead ends: 9647 [2021-11-06 14:32:25,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:32:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9647 states. [2021-11-06 14:32:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9647 to 9635. [2021-11-06 14:32:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9635 states, 9634 states have (on average 1.3624662653103592) internal successors, (13126), 9634 states have internal predecessors, (13126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9635 states to 9635 states and 13126 transitions. [2021-11-06 14:32:26,521 INFO L78 Accepts]: Start accepts. Automaton has 9635 states and 13126 transitions. Word has length 103 [2021-11-06 14:32:26,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:26,521 INFO L470 AbstractCegarLoop]: Abstraction has 9635 states and 13126 transitions. [2021-11-06 14:32:26,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:26,521 INFO L276 IsEmpty]: Start isEmpty. Operand 9635 states and 13126 transitions. [2021-11-06 14:32:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-06 14:32:26,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:26,529 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:26,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:26,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:26,735 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash -170058870, now seen corresponding path program 3 times [2021-11-06 14:32:26,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:26,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729207128] [2021-11-06 14:32:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:26,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:26,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:26,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516201845] [2021-11-06 14:32:26,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:32:26,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:26,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:26,756 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:26,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-06 14:32:27,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:32:27,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:32:27,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-06 14:32:27,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-06 14:32:27,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:27,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729207128] [2021-11-06 14:32:27,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:27,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516201845] [2021-11-06 14:32:27,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516201845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:27,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:27,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-06 14:32:27,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287644876] [2021-11-06 14:32:27,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:32:27,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:27,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:32:27,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:32:27,879 INFO L87 Difference]: Start difference. First operand 9635 states and 13126 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:35,790 INFO L93 Difference]: Finished difference Result 101484 states and 141897 transitions. [2021-11-06 14:32:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-06 14:32:35,791 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-06 14:32:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:35,993 INFO L225 Difference]: With dead ends: 101484 [2021-11-06 14:32:35,993 INFO L226 Difference]: Without dead ends: 91926 [2021-11-06 14:32:36,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2021-11-06 14:32:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91926 states. [2021-11-06 14:32:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91926 to 9707. [2021-11-06 14:32:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9707 states, 9706 states have (on average 1.3597774572429424) internal successors, (13198), 9706 states have internal predecessors, (13198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9707 states to 9707 states and 13198 transitions. [2021-11-06 14:32:37,410 INFO L78 Accepts]: Start accepts. Automaton has 9707 states and 13198 transitions. Word has length 107 [2021-11-06 14:32:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:37,411 INFO L470 AbstractCegarLoop]: Abstraction has 9707 states and 13198 transitions. [2021-11-06 14:32:37,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:37,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9707 states and 13198 transitions. [2021-11-06 14:32:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-06 14:32:37,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:37,422 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:37,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-06 14:32:37,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:37,635 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:37,636 INFO L85 PathProgramCache]: Analyzing trace with hash 310155015, now seen corresponding path program 1 times [2021-11-06 14:32:37,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:37,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75072421] [2021-11-06 14:32:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:37,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:37,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:37,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296765985] [2021-11-06 14:32:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:37,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:37,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:37,657 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:37,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-06 14:32:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:38,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:32:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-06 14:32:38,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:38,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75072421] [2021-11-06 14:32:38,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:38,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296765985] [2021-11-06 14:32:38,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296765985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:38,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:38,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:32:38,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233848382] [2021-11-06 14:32:38,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:32:38,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:38,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:32:38,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:32:38,628 INFO L87 Difference]: Start difference. First operand 9707 states and 13198 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:41,590 INFO L93 Difference]: Finished difference Result 30491 states and 41878 transitions. [2021-11-06 14:32:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:32:41,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-06 14:32:41,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:41,634 INFO L225 Difference]: With dead ends: 30491 [2021-11-06 14:32:41,634 INFO L226 Difference]: Without dead ends: 25185 [2021-11-06 14:32:41,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:32:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25185 states. [2021-11-06 14:32:43,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25185 to 19598. [2021-11-06 14:32:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19598 states, 19597 states have (on average 1.3678624279226412) internal successors, (26806), 19597 states have internal predecessors, (26806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19598 states to 19598 states and 26806 transitions. [2021-11-06 14:32:43,407 INFO L78 Accepts]: Start accepts. Automaton has 19598 states and 26806 transitions. Word has length 111 [2021-11-06 14:32:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:43,407 INFO L470 AbstractCegarLoop]: Abstraction has 19598 states and 26806 transitions. [2021-11-06 14:32:43,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 19598 states and 26806 transitions. [2021-11-06 14:32:43,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-06 14:32:43,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:43,419 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:43,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:43,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:43,638 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:43,639 INFO L85 PathProgramCache]: Analyzing trace with hash 702343080, now seen corresponding path program 1 times [2021-11-06 14:32:43,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:43,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958838914] [2021-11-06 14:32:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:43,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:43,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:43,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751304950] [2021-11-06 14:32:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:43,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:43,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:43,705 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:43,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-06 14:32:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:44,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:32:44,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-06 14:32:44,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:44,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958838914] [2021-11-06 14:32:44,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:44,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751304950] [2021-11-06 14:32:44,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751304950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:44,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:44,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:32:44,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528651287] [2021-11-06 14:32:44,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:32:44,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:32:44,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:32:44,681 INFO L87 Difference]: Start difference. First operand 19598 states and 26806 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:48,566 INFO L93 Difference]: Finished difference Result 55578 states and 76382 transitions. [2021-11-06 14:32:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:32:48,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-06 14:32:48,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:48,637 INFO L225 Difference]: With dead ends: 55578 [2021-11-06 14:32:48,637 INFO L226 Difference]: Without dead ends: 40381 [2021-11-06 14:32:48,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:32:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40381 states. [2021-11-06 14:32:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40381 to 19510. [2021-11-06 14:32:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19510 states, 19509 states have (on average 1.3561945768619612) internal successors, (26458), 19509 states have internal predecessors, (26458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19510 states to 19510 states and 26458 transitions. [2021-11-06 14:32:50,661 INFO L78 Accepts]: Start accepts. Automaton has 19510 states and 26458 transitions. Word has length 113 [2021-11-06 14:32:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:50,661 INFO L470 AbstractCegarLoop]: Abstraction has 19510 states and 26458 transitions. [2021-11-06 14:32:50,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 19510 states and 26458 transitions. [2021-11-06 14:32:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-06 14:32:50,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:50,674 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:50,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:50,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:50,895 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1598324271, now seen corresponding path program 1 times [2021-11-06 14:32:50,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:50,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350305230] [2021-11-06 14:32:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:50,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:50,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:50,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091923481] [2021-11-06 14:32:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:50,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:50,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:50,936 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:50,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-06 14:32:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:51,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-06 14:32:51,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:32:52,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:52,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350305230] [2021-11-06 14:32:52,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:52,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091923481] [2021-11-06 14:32:52,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091923481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:52,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:32:52,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-06 14:32:52,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79905531] [2021-11-06 14:32:52,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:32:52,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:52,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:32:52,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:32:52,147 INFO L87 Difference]: Start difference. First operand 19510 states and 26458 transitions. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:54,189 INFO L93 Difference]: Finished difference Result 19543 states and 26495 transitions. [2021-11-06 14:32:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 14:32:54,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-06 14:32:54,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:54,220 INFO L225 Difference]: With dead ends: 19543 [2021-11-06 14:32:54,220 INFO L226 Difference]: Without dead ends: 19535 [2021-11-06 14:32:54,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:32:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19535 states. [2021-11-06 14:32:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19535 to 19523. [2021-11-06 14:32:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19523 states, 19522 states have (on average 1.3560598299354574) internal successors, (26473), 19522 states have internal predecessors, (26473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19523 states to 19523 states and 26473 transitions. [2021-11-06 14:32:55,910 INFO L78 Accepts]: Start accepts. Automaton has 19523 states and 26473 transitions. Word has length 115 [2021-11-06 14:32:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:55,910 INFO L470 AbstractCegarLoop]: Abstraction has 19523 states and 26473 transitions. [2021-11-06 14:32:55,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 19523 states and 26473 transitions. [2021-11-06 14:32:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-06 14:32:55,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:55,924 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:55,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-06 14:32:56,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-06 14:32:56,139 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:56,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2048983986, now seen corresponding path program 2 times [2021-11-06 14:32:56,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:56,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021590714] [2021-11-06 14:32:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:56,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:56,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:32:56,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937593065] [2021-11-06 14:32:56,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:32:56,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:56,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:56,168 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:56,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-06 14:32:56,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:32:56,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:32:56,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 14:32:56,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:32:57,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:57,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021590714] [2021-11-06 14:32:57,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:32:57,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937593065] [2021-11-06 14:32:57,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937593065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:57,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:32:57,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-06 14:32:57,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823161321] [2021-11-06 14:32:57,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-06 14:32:57,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:57,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-06 14:32:57,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:32:57,226 INFO L87 Difference]: Start difference. First operand 19523 states and 26473 transitions. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 11 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:59,293 INFO L93 Difference]: Finished difference Result 19556 states and 26510 transitions. [2021-11-06 14:32:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 14:32:59,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 11 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-06 14:32:59,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:59,327 INFO L225 Difference]: With dead ends: 19556 [2021-11-06 14:32:59,327 INFO L226 Difference]: Without dead ends: 19548 [2021-11-06 14:32:59,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:32:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19548 states. [2021-11-06 14:33:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19548 to 19536. [2021-11-06 14:33:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19536 states, 19535 states have (on average 1.355925262349629) internal successors, (26488), 19535 states have internal predecessors, (26488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19536 states to 19536 states and 26488 transitions. [2021-11-06 14:33:01,058 INFO L78 Accepts]: Start accepts. Automaton has 19536 states and 26488 transitions. Word has length 119 [2021-11-06 14:33:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:01,059 INFO L470 AbstractCegarLoop]: Abstraction has 19536 states and 26488 transitions. [2021-11-06 14:33:01,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 11 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 19536 states and 26488 transitions. [2021-11-06 14:33:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-06 14:33:01,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:01,108 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:01,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:01,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-06 14:33:01,309 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:01,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:01,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1061203219, now seen corresponding path program 3 times [2021-11-06 14:33:01,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:01,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228249379] [2021-11-06 14:33:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:01,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:01,332 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:33:01,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939620926] [2021-11-06 14:33:01,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:33:01,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:01,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:01,335 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:01,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-06 14:33:03,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-06 14:33:03,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:33:03,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-06 14:33:03,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-06 14:33:03,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:03,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228249379] [2021-11-06 14:33:03,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:33:03,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939620926] [2021-11-06 14:33:03,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939620926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:03,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:03,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:33:03,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329811195] [2021-11-06 14:33:03,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:33:03,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:03,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:33:03,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:33:03,677 INFO L87 Difference]: Start difference. First operand 19536 states and 26488 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:05,403 INFO L93 Difference]: Finished difference Result 39076 states and 52983 transitions. [2021-11-06 14:33:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:33:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-06 14:33:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:05,436 INFO L225 Difference]: With dead ends: 39076 [2021-11-06 14:33:05,437 INFO L226 Difference]: Without dead ends: 19563 [2021-11-06 14:33:05,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:33:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19563 states. [2021-11-06 14:33:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19563 to 19536. [2021-11-06 14:33:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19536 states, 19535 states have (on average 1.3558740721781417) internal successors, (26487), 19535 states have internal predecessors, (26487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19536 states to 19536 states and 26487 transitions. [2021-11-06 14:33:07,043 INFO L78 Accepts]: Start accepts. Automaton has 19536 states and 26487 transitions. Word has length 123 [2021-11-06 14:33:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:07,043 INFO L470 AbstractCegarLoop]: Abstraction has 19536 states and 26487 transitions. [2021-11-06 14:33:07,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 19536 states and 26487 transitions. [2021-11-06 14:33:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-06 14:33:07,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:07,061 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:07,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-06 14:33:07,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-06 14:33:07,287 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash -610477459, now seen corresponding path program 1 times [2021-11-06 14:33:07,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:07,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131988240] [2021-11-06 14:33:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:07,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:07,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:33:07,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13903164] [2021-11-06 14:33:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:07,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:07,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:07,315 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:07,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-06 14:33:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-06 14:33:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:33:08,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:08,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131988240] [2021-11-06 14:33:08,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:33:08,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13903164] [2021-11-06 14:33:08,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13903164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:08,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:33:08,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-06 14:33:08,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048609254] [2021-11-06 14:33:08,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-06 14:33:08,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:08,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-06 14:33:08,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:33:08,674 INFO L87 Difference]: Start difference. First operand 19536 states and 26487 transitions. Second operand has 13 states, 13 states have (on average 9.153846153846153) internal successors, (119), 12 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:10,558 INFO L93 Difference]: Finished difference Result 19569 states and 26524 transitions. [2021-11-06 14:33:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 14:33:10,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.153846153846153) internal successors, (119), 12 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-06 14:33:10,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:10,588 INFO L225 Difference]: With dead ends: 19569 [2021-11-06 14:33:10,589 INFO L226 Difference]: Without dead ends: 19561 [2021-11-06 14:33:10,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:33:10,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19561 states. [2021-11-06 14:33:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19561 to 19549. [2021-11-06 14:33:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19549 states, 19548 states have (on average 1.3557397176181707) internal successors, (26502), 19548 states have internal predecessors, (26502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19549 states to 19549 states and 26502 transitions. [2021-11-06 14:33:12,207 INFO L78 Accepts]: Start accepts. Automaton has 19549 states and 26502 transitions. Word has length 126 [2021-11-06 14:33:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:12,208 INFO L470 AbstractCegarLoop]: Abstraction has 19549 states and 26502 transitions. [2021-11-06 14:33:12,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.153846153846153) internal successors, (119), 12 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 19549 states and 26502 transitions. [2021-11-06 14:33:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-06 14:33:12,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:12,226 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:12,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-06 14:33:12,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:12,450 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash 705890700, now seen corresponding path program 2 times [2021-11-06 14:33:12,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:12,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31081055] [2021-11-06 14:33:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:12,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:12,545 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:33:12,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796726702] [2021-11-06 14:33:12,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:33:12,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:12,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:12,547 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:12,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-06 14:33:13,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:33:13,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:33:13,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 14:33:13,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:33:13,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:13,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31081055] [2021-11-06 14:33:14,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:33:14,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796726702] [2021-11-06 14:33:14,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796726702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:14,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:33:14,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-06 14:33:14,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090476550] [2021-11-06 14:33:14,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-06 14:33:14,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-06 14:33:14,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:33:14,001 INFO L87 Difference]: Start difference. First operand 19549 states and 26502 transitions. Second operand has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 13 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:15,900 INFO L93 Difference]: Finished difference Result 19582 states and 26539 transitions. [2021-11-06 14:33:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-06 14:33:15,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 13 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-06 14:33:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:15,934 INFO L225 Difference]: With dead ends: 19582 [2021-11-06 14:33:15,934 INFO L226 Difference]: Without dead ends: 19574 [2021-11-06 14:33:15,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:33:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19574 states. [2021-11-06 14:33:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19574 to 19562. [2021-11-06 14:33:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19562 states, 19561 states have (on average 1.3556055416389756) internal successors, (26517), 19561 states have internal predecessors, (26517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19562 states to 19562 states and 26517 transitions. [2021-11-06 14:33:17,641 INFO L78 Accepts]: Start accepts. Automaton has 19562 states and 26517 transitions. Word has length 130 [2021-11-06 14:33:17,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:17,641 INFO L470 AbstractCegarLoop]: Abstraction has 19562 states and 26517 transitions. [2021-11-06 14:33:17,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 13 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 19562 states and 26517 transitions. [2021-11-06 14:33:17,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-06 14:33:17,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:17,661 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:17,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:17,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-06 14:33:17,862 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:17,863 INFO L85 PathProgramCache]: Analyzing trace with hash -443641557, now seen corresponding path program 3 times [2021-11-06 14:33:17,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:17,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198625254] [2021-11-06 14:33:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:17,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:17,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:33:17,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854517426] [2021-11-06 14:33:17,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:33:17,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:17,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:17,925 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:17,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-06 14:33:19,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-06 14:33:19,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:33:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-06 14:33:19,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-06 14:33:19,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:19,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198625254] [2021-11-06 14:33:19,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:33:19,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854517426] [2021-11-06 14:33:19,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854517426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:19,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:19,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 14:33:19,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146669051] [2021-11-06 14:33:19,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:33:19,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:33:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:33:19,830 INFO L87 Difference]: Start difference. First operand 19562 states and 26517 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:26,296 INFO L93 Difference]: Finished difference Result 91655 states and 124020 transitions. [2021-11-06 14:33:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 14:33:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-06 14:33:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:26,456 INFO L225 Difference]: With dead ends: 91655 [2021-11-06 14:33:26,456 INFO L226 Difference]: Without dead ends: 72112 [2021-11-06 14:33:26,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:33:26,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72112 states. [2021-11-06 14:33:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72112 to 19562. [2021-11-06 14:33:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19562 states, 19561 states have (on average 1.3555544195082052) internal successors, (26516), 19561 states have internal predecessors, (26516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19562 states to 19562 states and 26516 transitions. [2021-11-06 14:33:28,790 INFO L78 Accepts]: Start accepts. Automaton has 19562 states and 26516 transitions. Word has length 134 [2021-11-06 14:33:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:28,791 INFO L470 AbstractCegarLoop]: Abstraction has 19562 states and 26516 transitions. [2021-11-06 14:33:28,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 19562 states and 26516 transitions. [2021-11-06 14:33:28,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-06 14:33:28,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:28,809 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:28,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:29,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-06 14:33:29,034 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:29,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1392130289, now seen corresponding path program 1 times [2021-11-06 14:33:29,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:29,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269492607] [2021-11-06 14:33:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:29,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:29,055 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:33:29,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986325785] [2021-11-06 14:33:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:29,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:29,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:29,056 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:29,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-06 14:33:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-06 14:33:30,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:33:30,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:30,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269492607] [2021-11-06 14:33:30,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:33:30,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986325785] [2021-11-06 14:33:30,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986325785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:30,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:33:30,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-06 14:33:30,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056601348] [2021-11-06 14:33:30,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 14:33:30,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 14:33:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-06 14:33:30,612 INFO L87 Difference]: Start difference. First operand 19562 states and 26516 transitions. Second operand has 15 states, 15 states have (on average 8.6) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:32,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:32,523 INFO L93 Difference]: Finished difference Result 19595 states and 26553 transitions. [2021-11-06 14:33:32,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-06 14:33:32,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.6) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-06 14:33:32,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:32,557 INFO L225 Difference]: With dead ends: 19595 [2021-11-06 14:33:32,557 INFO L226 Difference]: Without dead ends: 19587 [2021-11-06 14:33:32,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-06 14:33:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19587 states. [2021-11-06 14:33:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19587 to 19575. [2021-11-06 14:33:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19575 states, 19574 states have (on average 1.3554204557065495) internal successors, (26531), 19574 states have internal predecessors, (26531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19575 states to 19575 states and 26531 transitions. [2021-11-06 14:33:34,456 INFO L78 Accepts]: Start accepts. Automaton has 19575 states and 26531 transitions. Word has length 136 [2021-11-06 14:33:34,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:34,457 INFO L470 AbstractCegarLoop]: Abstraction has 19575 states and 26531 transitions. [2021-11-06 14:33:34,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.6) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 19575 states and 26531 transitions. [2021-11-06 14:33:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-06 14:33:34,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:34,478 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:34,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:34,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:34,701 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash 235984174, now seen corresponding path program 2 times [2021-11-06 14:33:34,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:34,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015684760] [2021-11-06 14:33:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:34,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:34,731 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:33:34,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979808960] [2021-11-06 14:33:34,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:33:34,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:34,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:34,733 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:34,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-06 14:33:35,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:33:35,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:33:35,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 14:33:35,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:33:36,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:36,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015684760] [2021-11-06 14:33:36,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:33:36,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979808960] [2021-11-06 14:33:36,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979808960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:36,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:33:36,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-06 14:33:36,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877284347] [2021-11-06 14:33:36,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-06 14:33:36,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:36,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-06 14:33:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:33:36,346 INFO L87 Difference]: Start difference. First operand 19575 states and 26531 transitions. Second operand has 16 states, 16 states have (on average 8.3125) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:38,544 INFO L93 Difference]: Finished difference Result 19608 states and 26568 transitions. [2021-11-06 14:33:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 14:33:38,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.3125) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-06 14:33:38,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:38,572 INFO L225 Difference]: With dead ends: 19608 [2021-11-06 14:33:38,572 INFO L226 Difference]: Without dead ends: 19600 [2021-11-06 14:33:38,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:33:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19600 states. [2021-11-06 14:33:40,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19600 to 19588. [2021-11-06 14:33:40,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19588 states, 19587 states have (on average 1.3552866697299228) internal successors, (26546), 19587 states have internal predecessors, (26546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19588 states to 19588 states and 26546 transitions. [2021-11-06 14:33:40,479 INFO L78 Accepts]: Start accepts. Automaton has 19588 states and 26546 transitions. Word has length 140 [2021-11-06 14:33:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:40,480 INFO L470 AbstractCegarLoop]: Abstraction has 19588 states and 26546 transitions. [2021-11-06 14:33:40,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.3125) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 19588 states and 26546 transitions. [2021-11-06 14:33:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-06 14:33:40,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:40,505 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:40,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:40,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:40,719 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:40,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1197884467, now seen corresponding path program 3 times [2021-11-06 14:33:40,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:40,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506511251] [2021-11-06 14:33:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:40,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:40,745 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:33:40,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665373584] [2021-11-06 14:33:40,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:33:40,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:40,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:40,748 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:40,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-06 14:33:57,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-06 14:33:57,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:33:57,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-06 14:33:57,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:33:57,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:57,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506511251] [2021-11-06 14:33:57,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:33:57,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665373584] [2021-11-06 14:33:57,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665373584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:57,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:33:57,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-06 14:33:57,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90125788] [2021-11-06 14:33:57,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-06 14:33:57,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-06 14:33:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:33:57,806 INFO L87 Difference]: Start difference. First operand 19588 states and 26546 transitions. Second operand has 17 states, 17 states have (on average 8.058823529411764) internal successors, (137), 16 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:34:00,360 INFO L93 Difference]: Finished difference Result 19621 states and 26583 transitions. [2021-11-06 14:34:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-06 14:34:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.058823529411764) internal successors, (137), 16 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-06 14:34:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:34:00,394 INFO L225 Difference]: With dead ends: 19621 [2021-11-06 14:34:00,394 INFO L226 Difference]: Without dead ends: 19613 [2021-11-06 14:34:00,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:34:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19613 states. [2021-11-06 14:34:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19613 to 19601. [2021-11-06 14:34:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19601 states, 19600 states have (on average 1.3551530612244898) internal successors, (26561), 19600 states have internal predecessors, (26561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19601 states to 19601 states and 26561 transitions. [2021-11-06 14:34:02,281 INFO L78 Accepts]: Start accepts. Automaton has 19601 states and 26561 transitions. Word has length 144 [2021-11-06 14:34:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:34:02,281 INFO L470 AbstractCegarLoop]: Abstraction has 19601 states and 26561 transitions. [2021-11-06 14:34:02,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.058823529411764) internal successors, (137), 16 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 19601 states and 26561 transitions. [2021-11-06 14:34:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-06 14:34:02,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:34:02,304 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:34:02,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-06 14:34:02,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:34:02,525 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:34:02,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:34:02,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1862255892, now seen corresponding path program 4 times [2021-11-06 14:34:02,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:34:02,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763928639] [2021-11-06 14:34:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:34:02,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:34:02,546 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:34:02,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796916271] [2021-11-06 14:34:02,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 14:34:02,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:34:02,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:34:02,547 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:34:02,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-06 14:34:03,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 14:34:03,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:34:03,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1424 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 14:34:03,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:34:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:34:04,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:34:04,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763928639] [2021-11-06 14:34:04,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:34:04,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796916271] [2021-11-06 14:34:04,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796916271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:34:04,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:34:04,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-06 14:34:04,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29521668] [2021-11-06 14:34:04,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-06 14:34:04,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:34:04,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-06 14:34:04,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-06 14:34:04,420 INFO L87 Difference]: Start difference. First operand 19601 states and 26561 transitions. Second operand has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:06,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:34:06,915 INFO L93 Difference]: Finished difference Result 19634 states and 26598 transitions. [2021-11-06 14:34:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-06 14:34:06,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-06 14:34:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:34:06,948 INFO L225 Difference]: With dead ends: 19634 [2021-11-06 14:34:06,948 INFO L226 Difference]: Without dead ends: 19626 [2021-11-06 14:34:06,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-06 14:34:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19626 states. [2021-11-06 14:34:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19626 to 19614. [2021-11-06 14:34:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19614 states, 19613 states have (on average 1.3550196298373527) internal successors, (26576), 19613 states have internal predecessors, (26576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19614 states to 19614 states and 26576 transitions. [2021-11-06 14:34:08,870 INFO L78 Accepts]: Start accepts. Automaton has 19614 states and 26576 transitions. Word has length 148 [2021-11-06 14:34:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:34:08,871 INFO L470 AbstractCegarLoop]: Abstraction has 19614 states and 26576 transitions. [2021-11-06 14:34:08,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 19614 states and 26576 transitions. [2021-11-06 14:34:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-06 14:34:08,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:34:08,894 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:34:08,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-06 14:34:09,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:34:09,107 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:34:09,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:34:09,108 INFO L85 PathProgramCache]: Analyzing trace with hash -977005941, now seen corresponding path program 5 times [2021-11-06 14:34:09,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:34:09,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316155478] [2021-11-06 14:34:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:34:09,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:34:09,130 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:34:09,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391702844] [2021-11-06 14:34:09,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 14:34:09,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:34:09,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:34:09,133 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:34:09,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-06 14:34:24,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-06 14:34:24,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:34:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1433 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 14:34:24,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:34:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:34:25,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:34:25,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316155478] [2021-11-06 14:34:25,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:34:25,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391702844] [2021-11-06 14:34:25,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391702844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:34:25,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:34:25,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-06 14:34:25,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090027673] [2021-11-06 14:34:25,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-06 14:34:25,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:34:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-06 14:34:25,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:34:25,317 INFO L87 Difference]: Start difference. First operand 19614 states and 26576 transitions. Second operand has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:34:27,674 INFO L93 Difference]: Finished difference Result 19647 states and 26613 transitions. [2021-11-06 14:34:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-06 14:34:27,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-06 14:34:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:34:27,704 INFO L225 Difference]: With dead ends: 19647 [2021-11-06 14:34:27,704 INFO L226 Difference]: Without dead ends: 19639 [2021-11-06 14:34:27,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:34:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19639 states. [2021-11-06 14:34:29,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19639 to 19627. [2021-11-06 14:34:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19627 states, 19626 states have (on average 1.3548863752165494) internal successors, (26591), 19626 states have internal predecessors, (26591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19627 states to 19627 states and 26591 transitions. [2021-11-06 14:34:29,503 INFO L78 Accepts]: Start accepts. Automaton has 19627 states and 26591 transitions. Word has length 152 [2021-11-06 14:34:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:34:29,504 INFO L470 AbstractCegarLoop]: Abstraction has 19627 states and 26591 transitions. [2021-11-06 14:34:29,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.631578947368421) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 19627 states and 26591 transitions. [2021-11-06 14:34:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-06 14:34:29,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:34:29,528 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:34:29,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-06 14:34:29,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-06 14:34:29,746 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:34:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:34:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1081802070, now seen corresponding path program 6 times [2021-11-06 14:34:29,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:34:29,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930618741] [2021-11-06 14:34:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:34:29,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:34:29,767 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:34:29,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880255208] [2021-11-06 14:34:29,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-06 14:34:29,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:34:29,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:34:29,769 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:34:29,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-06 14:34:47,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-06 14:34:47,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:34:47,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-06 14:34:47,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:34:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:34:48,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:34:48,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930618741] [2021-11-06 14:34:48,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:34:48,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880255208] [2021-11-06 14:34:48,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880255208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:34:48,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:34:48,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-06 14:34:48,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882831097] [2021-11-06 14:34:48,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-06 14:34:48,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:34:48,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-06 14:34:48,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-06 14:34:48,623 INFO L87 Difference]: Start difference. First operand 19627 states and 26591 transitions. Second operand has 20 states, 20 states have (on average 7.45) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:34:51,396 INFO L93 Difference]: Finished difference Result 19660 states and 26628 transitions. [2021-11-06 14:34:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-06 14:34:51,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.45) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-06 14:34:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:34:51,429 INFO L225 Difference]: With dead ends: 19660 [2021-11-06 14:34:51,429 INFO L226 Difference]: Without dead ends: 19652 [2021-11-06 14:34:51,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-06 14:34:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19652 states. [2021-11-06 14:34:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19652 to 19640. [2021-11-06 14:34:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19640 states, 19639 states have (on average 1.3547532970110494) internal successors, (26606), 19639 states have internal predecessors, (26606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19640 states to 19640 states and 26606 transitions. [2021-11-06 14:34:53,353 INFO L78 Accepts]: Start accepts. Automaton has 19640 states and 26606 transitions. Word has length 156 [2021-11-06 14:34:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:34:53,354 INFO L470 AbstractCegarLoop]: Abstraction has 19640 states and 26606 transitions. [2021-11-06 14:34:53,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.45) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 19640 states and 26606 transitions. [2021-11-06 14:34:53,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-06 14:34:53,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:34:53,379 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:34:53,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-06 14:34:53,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:34:53,602 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:34:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:34:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash 285395785, now seen corresponding path program 7 times [2021-11-06 14:34:53,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:34:53,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23500625] [2021-11-06 14:34:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:34:53,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:34:53,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:34:53,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543174580] [2021-11-06 14:34:53,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-06 14:34:53,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:34:53,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:34:53,656 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:34:53,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-06 14:34:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:34:55,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-06 14:34:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:34:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:34:55,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:34:55,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23500625] [2021-11-06 14:34:55,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:34:55,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543174580] [2021-11-06 14:34:55,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543174580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:34:55,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:34:55,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-06 14:34:55,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611012561] [2021-11-06 14:34:55,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-06 14:34:55,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:34:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-06 14:34:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-06 14:34:55,894 INFO L87 Difference]: Start difference. First operand 19640 states and 26606 transitions. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:34:58,718 INFO L93 Difference]: Finished difference Result 19673 states and 26643 transitions. [2021-11-06 14:34:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-06 14:34:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-06 14:34:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:34:58,753 INFO L225 Difference]: With dead ends: 19673 [2021-11-06 14:34:58,753 INFO L226 Difference]: Without dead ends: 19665 [2021-11-06 14:34:58,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-06 14:34:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19665 states. [2021-11-06 14:35:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19665 to 19653. [2021-11-06 14:35:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19653 states, 19652 states have (on average 1.3546203948707511) internal successors, (26621), 19652 states have internal predecessors, (26621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:00,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19653 states to 19653 states and 26621 transitions. [2021-11-06 14:35:00,746 INFO L78 Accepts]: Start accepts. Automaton has 19653 states and 26621 transitions. Word has length 160 [2021-11-06 14:35:00,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:35:00,746 INFO L470 AbstractCegarLoop]: Abstraction has 19653 states and 26621 transitions. [2021-11-06 14:35:00,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:00,747 INFO L276 IsEmpty]: Start isEmpty. Operand 19653 states and 26621 transitions. [2021-11-06 14:35:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-06 14:35:00,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:35:00,777 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:35:00,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-06 14:35:01,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:35:01,001 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:35:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:35:01,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1729965160, now seen corresponding path program 8 times [2021-11-06 14:35:01,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:35:01,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974010338] [2021-11-06 14:35:01,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:35:01,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:35:01,046 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:35:01,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126779952] [2021-11-06 14:35:01,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:35:01,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:35:01,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:35:01,048 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:35:01,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-06 14:35:02,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:35:02,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:35:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1460 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-06 14:35:02,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:35:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:35:03,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:35:03,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974010338] [2021-11-06 14:35:03,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:35:03,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126779952] [2021-11-06 14:35:03,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126779952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:35:03,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:35:03,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-06 14:35:03,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100524086] [2021-11-06 14:35:03,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-06 14:35:03,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:35:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-06 14:35:03,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-06 14:35:03,384 INFO L87 Difference]: Start difference. First operand 19653 states and 26621 transitions. Second operand has 22 states, 22 states have (on average 7.136363636363637) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:35:05,840 INFO L93 Difference]: Finished difference Result 19686 states and 26658 transitions. [2021-11-06 14:35:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-06 14:35:05,841 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.136363636363637) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-06 14:35:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:35:05,870 INFO L225 Difference]: With dead ends: 19686 [2021-11-06 14:35:05,871 INFO L226 Difference]: Without dead ends: 19678 [2021-11-06 14:35:05,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-06 14:35:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19678 states. [2021-11-06 14:35:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19678 to 19666. [2021-11-06 14:35:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19666 states, 19665 states have (on average 1.3544876684464786) internal successors, (26636), 19665 states have internal predecessors, (26636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:07,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19666 states to 19666 states and 26636 transitions. [2021-11-06 14:35:07,671 INFO L78 Accepts]: Start accepts. Automaton has 19666 states and 26636 transitions. Word has length 164 [2021-11-06 14:35:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:35:07,671 INFO L470 AbstractCegarLoop]: Abstraction has 19666 states and 26636 transitions. [2021-11-06 14:35:07,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.136363636363637) internal successors, (157), 21 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 19666 states and 26636 transitions. [2021-11-06 14:35:07,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 14:35:07,698 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:35:07,698 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:35:07,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-06 14:35:07,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-06 14:35:07,911 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:35:07,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:35:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2027152903, now seen corresponding path program 9 times [2021-11-06 14:35:07,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:35:07,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137255321] [2021-11-06 14:35:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:35:07,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:35:07,932 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:35:07,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289934865] [2021-11-06 14:35:07,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:35:07,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:35:07,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:35:07,934 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:35:07,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-06 14:35:17,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-06 14:35:17,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:35:18,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1469 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-06 14:35:18,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:35:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:35:18,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:35:18,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137255321] [2021-11-06 14:35:18,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:35:18,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289934865] [2021-11-06 14:35:18,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289934865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:35:18,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:35:18,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-06 14:35:18,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37120956] [2021-11-06 14:35:18,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-06 14:35:18,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:35:18,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-06 14:35:18,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-06 14:35:18,671 INFO L87 Difference]: Start difference. First operand 19666 states and 26636 transitions. Second operand has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:35:21,679 INFO L93 Difference]: Finished difference Result 19699 states and 26673 transitions. [2021-11-06 14:35:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-06 14:35:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-06 14:35:21,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:35:21,713 INFO L225 Difference]: With dead ends: 19699 [2021-11-06 14:35:21,713 INFO L226 Difference]: Without dead ends: 19691 [2021-11-06 14:35:21,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-06 14:35:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19691 states. [2021-11-06 14:35:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19691 to 19679. [2021-11-06 14:35:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19679 states, 19678 states have (on average 1.3543551173899786) internal successors, (26651), 19678 states have internal predecessors, (26651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19679 states to 19679 states and 26651 transitions. [2021-11-06 14:35:23,629 INFO L78 Accepts]: Start accepts. Automaton has 19679 states and 26651 transitions. Word has length 168 [2021-11-06 14:35:23,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:35:23,630 INFO L470 AbstractCegarLoop]: Abstraction has 19679 states and 26651 transitions. [2021-11-06 14:35:23,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:23,630 INFO L276 IsEmpty]: Start isEmpty. Operand 19679 states and 26651 transitions. [2021-11-06 14:35:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-06 14:35:23,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:35:23,655 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:35:23,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-06 14:35:23,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-06 14:35:23,870 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:35:23,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:35:23,871 INFO L85 PathProgramCache]: Analyzing trace with hash -146360282, now seen corresponding path program 10 times [2021-11-06 14:35:23,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:35:23,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722134724] [2021-11-06 14:35:23,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:35:23,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:35:23,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:35:23,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367041614] [2021-11-06 14:35:23,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 14:35:23,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:35:23,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:35:23,925 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:35:23,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-06 14:35:25,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 14:35:25,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:35:25,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-06 14:35:25,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:35:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:35:26,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:35:26,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722134724] [2021-11-06 14:35:26,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:35:26,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367041614] [2021-11-06 14:35:26,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367041614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:35:26,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:35:26,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-06 14:35:26,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880286762] [2021-11-06 14:35:26,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-06 14:35:26,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:35:26,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-06 14:35:26,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-06 14:35:26,459 INFO L87 Difference]: Start difference. First operand 19679 states and 26651 transitions. Second operand has 24 states, 24 states have (on average 6.875) internal successors, (165), 23 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:28,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:35:28,926 INFO L93 Difference]: Finished difference Result 19712 states and 26688 transitions. [2021-11-06 14:35:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-06 14:35:28,927 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.875) internal successors, (165), 23 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-11-06 14:35:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:35:28,963 INFO L225 Difference]: With dead ends: 19712 [2021-11-06 14:35:28,964 INFO L226 Difference]: Without dead ends: 19704 [2021-11-06 14:35:28,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-06 14:35:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19704 states. [2021-11-06 14:35:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19704 to 19692. [2021-11-06 14:35:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19692 states, 19691 states have (on average 1.354222741353918) internal successors, (26666), 19691 states have internal predecessors, (26666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19692 states to 19692 states and 26666 transitions. [2021-11-06 14:35:30,909 INFO L78 Accepts]: Start accepts. Automaton has 19692 states and 26666 transitions. Word has length 172 [2021-11-06 14:35:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:35:30,910 INFO L470 AbstractCegarLoop]: Abstraction has 19692 states and 26666 transitions. [2021-11-06 14:35:30,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.875) internal successors, (165), 23 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:35:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 19692 states and 26666 transitions. [2021-11-06 14:35:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-06 14:35:30,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:35:30,937 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:35:30,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-06 14:35:31,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-06 14:35:31,161 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:35:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:35:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2109039301, now seen corresponding path program 11 times [2021-11-06 14:35:31,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:35:31,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077086317] [2021-11-06 14:35:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:35:31,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:35:31,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:35:31,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369802154] [2021-11-06 14:35:31,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 14:35:31,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:35:31,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:35:31,191 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:35:31,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-06 14:37:47,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-06 14:37:47,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:37:48,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-06 14:37:48,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:37:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:37:48,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:37:48,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077086317] [2021-11-06 14:37:48,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:37:48,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369802154] [2021-11-06 14:37:48,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369802154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:37:48,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:37:48,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-06 14:37:48,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640711363] [2021-11-06 14:37:48,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-06 14:37:48,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:37:48,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-06 14:37:48,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-06 14:37:48,834 INFO L87 Difference]: Start difference. First operand 19692 states and 26666 transitions. Second operand has 25 states, 25 states have (on average 6.76) internal successors, (169), 24 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:37:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:37:51,613 INFO L93 Difference]: Finished difference Result 19725 states and 26703 transitions. [2021-11-06 14:37:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-06 14:37:51,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.76) internal successors, (169), 24 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-11-06 14:37:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:37:51,649 INFO L225 Difference]: With dead ends: 19725 [2021-11-06 14:37:51,649 INFO L226 Difference]: Without dead ends: 19717 [2021-11-06 14:37:51,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-06 14:37:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19717 states. [2021-11-06 14:37:53,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19717 to 19705. [2021-11-06 14:37:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19705 states, 19704 states have (on average 1.35409053999188) internal successors, (26681), 19704 states have internal predecessors, (26681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:37:53,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19705 states to 19705 states and 26681 transitions. [2021-11-06 14:37:53,835 INFO L78 Accepts]: Start accepts. Automaton has 19705 states and 26681 transitions. Word has length 176 [2021-11-06 14:37:53,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:37:53,835 INFO L470 AbstractCegarLoop]: Abstraction has 19705 states and 26681 transitions. [2021-11-06 14:37:53,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.76) internal successors, (169), 24 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:37:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 19705 states and 26681 transitions. [2021-11-06 14:37:53,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-06 14:37:53,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:37:53,869 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:37:53,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-06 14:37:54,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-06 14:37:54,070 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:37:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:37:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2122340892, now seen corresponding path program 12 times [2021-11-06 14:37:54,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:37:54,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941355194] [2021-11-06 14:37:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:37:54,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:37:54,092 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:37:54,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041456390] [2021-11-06 14:37:54,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-06 14:37:54,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:37:54,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:37:54,093 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:37:54,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-06 14:38:18,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-06 14:38:18,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:38:18,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-06 14:38:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:38:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 959 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:38:19,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:38:19,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941355194] [2021-11-06 14:38:19,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:38:19,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041456390] [2021-11-06 14:38:19,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041456390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:38:19,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:38:19,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-06 14:38:19,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908853] [2021-11-06 14:38:19,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-06 14:38:19,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:38:19,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-06 14:38:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-06 14:38:19,795 INFO L87 Difference]: Start difference. First operand 19705 states and 26681 transitions. Second operand has 26 states, 26 states have (on average 6.653846153846154) internal successors, (173), 25 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:38:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:38:22,597 INFO L93 Difference]: Finished difference Result 19738 states and 26718 transitions. [2021-11-06 14:38:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-06 14:38:22,598 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.653846153846154) internal successors, (173), 25 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-11-06 14:38:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:38:22,630 INFO L225 Difference]: With dead ends: 19738 [2021-11-06 14:38:22,630 INFO L226 Difference]: Without dead ends: 19730 [2021-11-06 14:38:22,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-06 14:38:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19730 states. [2021-11-06 14:38:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19730 to 19718. [2021-11-06 14:38:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19718 states, 19717 states have (on average 1.353958512958361) internal successors, (26696), 19717 states have internal predecessors, (26696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:38:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19718 states to 19718 states and 26696 transitions. [2021-11-06 14:38:24,645 INFO L78 Accepts]: Start accepts. Automaton has 19718 states and 26696 transitions. Word has length 180 [2021-11-06 14:38:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:38:24,646 INFO L470 AbstractCegarLoop]: Abstraction has 19718 states and 26696 transitions. [2021-11-06 14:38:24,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.653846153846154) internal successors, (173), 25 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:38:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 19718 states and 26696 transitions. [2021-11-06 14:38:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-06 14:38:24,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:38:24,676 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:38:24,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-06 14:38:24,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:38:24,877 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:38:24,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:38:24,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1109737859, now seen corresponding path program 13 times [2021-11-06 14:38:24,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:38:24,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265461867] [2021-11-06 14:38:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:38:24,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:38:24,903 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:38:24,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598020700] [2021-11-06 14:38:24,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-06 14:38:24,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:38:24,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:38:24,905 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:38:24,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-06 14:38:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:38:26,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1505 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-06 14:38:27,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:38:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:38:27,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:38:27,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265461867] [2021-11-06 14:38:27,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:38:27,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598020700] [2021-11-06 14:38:27,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598020700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:38:27,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:38:27,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-06 14:38:27,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272944962] [2021-11-06 14:38:27,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-06 14:38:27,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:38:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-06 14:38:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-06 14:38:27,930 INFO L87 Difference]: Start difference. First operand 19718 states and 26696 transitions. Second operand has 27 states, 27 states have (on average 6.555555555555555) internal successors, (177), 26 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:38:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:38:31,211 INFO L93 Difference]: Finished difference Result 19751 states and 26733 transitions. [2021-11-06 14:38:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-06 14:38:31,212 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.555555555555555) internal successors, (177), 26 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-06 14:38:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:38:31,238 INFO L225 Difference]: With dead ends: 19751 [2021-11-06 14:38:31,238 INFO L226 Difference]: Without dead ends: 19743 [2021-11-06 14:38:31,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-06 14:38:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19743 states. [2021-11-06 14:38:32,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19743 to 19731. [2021-11-06 14:38:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19731 states, 19730 states have (on average 1.3538266599087683) internal successors, (26711), 19730 states have internal predecessors, (26711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:38:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19731 states to 19731 states and 26711 transitions. [2021-11-06 14:38:33,044 INFO L78 Accepts]: Start accepts. Automaton has 19731 states and 26711 transitions. Word has length 184 [2021-11-06 14:38:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:38:33,045 INFO L470 AbstractCegarLoop]: Abstraction has 19731 states and 26711 transitions. [2021-11-06 14:38:33,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.555555555555555) internal successors, (177), 26 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:38:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 19731 states and 26711 transitions. [2021-11-06 14:38:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-06 14:38:33,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:38:33,071 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:38:33,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-06 14:38:33,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-06 14:38:33,287 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:38:33,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:38:33,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1186597470, now seen corresponding path program 14 times [2021-11-06 14:38:33,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:38:33,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008049472] [2021-11-06 14:38:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:38:33,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:38:33,310 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:38:33,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676330270] [2021-11-06 14:38:33,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:38:33,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:38:33,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:38:33,312 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:38:33,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-06 14:38:35,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:38:35,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:38:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-06 14:38:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:38:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:38:36,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:38:36,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008049472] [2021-11-06 14:38:36,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:38:36,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676330270] [2021-11-06 14:38:36,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676330270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:38:36,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:38:36,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-06 14:38:36,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92228539] [2021-11-06 14:38:36,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-06 14:38:36,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:38:36,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-06 14:38:36,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-06 14:38:36,299 INFO L87 Difference]: Start difference. First operand 19731 states and 26711 transitions. Second operand has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:38:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:38:39,142 INFO L93 Difference]: Finished difference Result 19764 states and 26748 transitions. [2021-11-06 14:38:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-06 14:38:39,143 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-06 14:38:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:38:39,172 INFO L225 Difference]: With dead ends: 19764 [2021-11-06 14:38:39,172 INFO L226 Difference]: Without dead ends: 19756 [2021-11-06 14:38:39,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-06 14:38:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19756 states. [2021-11-06 14:38:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19756 to 19744. [2021-11-06 14:38:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19744 states, 19743 states have (on average 1.3536949804994176) internal successors, (26726), 19743 states have internal predecessors, (26726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:38:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19744 states to 19744 states and 26726 transitions. [2021-11-06 14:38:41,119 INFO L78 Accepts]: Start accepts. Automaton has 19744 states and 26726 transitions. Word has length 188 [2021-11-06 14:38:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:38:41,119 INFO L470 AbstractCegarLoop]: Abstraction has 19744 states and 26726 transitions. [2021-11-06 14:38:41,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 27 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:38:41,120 INFO L276 IsEmpty]: Start isEmpty. Operand 19744 states and 26726 transitions. [2021-11-06 14:38:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-06 14:38:41,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:38:41,147 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:38:41,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-06 14:38:41,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-06 14:38:41,363 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:38:41,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:38:41,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1969126847, now seen corresponding path program 15 times [2021-11-06 14:38:41,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:38:41,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151866321] [2021-11-06 14:38:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:38:41,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:38:41,417 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:38:41,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700374597] [2021-11-06 14:38:41,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:38:41,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:38:41,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:38:41,419 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:38:41,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-06 14:38:55,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-11-06 14:38:55,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:38:55,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-06 14:38:55,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:38:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:38:56,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:38:56,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151866321] [2021-11-06 14:38:56,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:38:56,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700374597] [2021-11-06 14:38:56,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700374597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:38:56,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:38:56,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-06 14:38:56,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944933687] [2021-11-06 14:38:56,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-06 14:38:56,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:38:56,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-06 14:38:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-06 14:38:56,455 INFO L87 Difference]: Start difference. First operand 19744 states and 26726 transitions. Second operand has 29 states, 29 states have (on average 6.379310344827586) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:38:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:38:59,191 INFO L93 Difference]: Finished difference Result 19777 states and 26763 transitions. [2021-11-06 14:38:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-06 14:38:59,192 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.379310344827586) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-06 14:38:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:38:59,225 INFO L225 Difference]: With dead ends: 19777 [2021-11-06 14:38:59,225 INFO L226 Difference]: Without dead ends: 19769 [2021-11-06 14:38:59,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-06 14:38:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19769 states. [2021-11-06 14:39:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19769 to 19757. [2021-11-06 14:39:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19757 states, 19756 states have (on average 1.3535634743875278) internal successors, (26741), 19756 states have internal predecessors, (26741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:39:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19757 states to 19757 states and 26741 transitions. [2021-11-06 14:39:01,326 INFO L78 Accepts]: Start accepts. Automaton has 19757 states and 26741 transitions. Word has length 192 [2021-11-06 14:39:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:39:01,326 INFO L470 AbstractCegarLoop]: Abstraction has 19757 states and 26741 transitions. [2021-11-06 14:39:01,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.379310344827586) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:39:01,327 INFO L276 IsEmpty]: Start isEmpty. Operand 19757 states and 26741 transitions. [2021-11-06 14:39:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-06 14:39:01,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:39:01,357 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:39:01,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-06 14:39:01,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-06 14:39:01,584 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:39:01,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:39:01,584 INFO L85 PathProgramCache]: Analyzing trace with hash -199776416, now seen corresponding path program 16 times [2021-11-06 14:39:01,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:39:01,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703239427] [2021-11-06 14:39:01,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:39:01,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:39:01,611 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:39:01,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029355883] [2021-11-06 14:39:01,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 14:39:01,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:39:01,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:39:01,613 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:39:01,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-06 14:39:03,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 14:39:03,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:39:03,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1532 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-06 14:39:03,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:39:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:39:04,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:39:04,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703239427] [2021-11-06 14:39:04,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:39:04,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029355883] [2021-11-06 14:39:04,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029355883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:39:04,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:39:04,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-06 14:39:04,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528650898] [2021-11-06 14:39:04,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-06 14:39:04,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:39:04,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-06 14:39:04,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-06 14:39:04,819 INFO L87 Difference]: Start difference. First operand 19757 states and 26741 transitions. Second operand has 30 states, 30 states have (on average 6.3) internal successors, (189), 29 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:39:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:39:07,458 INFO L93 Difference]: Finished difference Result 19790 states and 26778 transitions. [2021-11-06 14:39:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-06 14:39:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.3) internal successors, (189), 29 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-06 14:39:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:39:07,492 INFO L225 Difference]: With dead ends: 19790 [2021-11-06 14:39:07,493 INFO L226 Difference]: Without dead ends: 19782 [2021-11-06 14:39:07,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-06 14:39:07,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19782 states. [2021-11-06 14:39:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19782 to 19770. [2021-11-06 14:39:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19770 states, 19769 states have (on average 1.3534321412312207) internal successors, (26756), 19769 states have internal predecessors, (26756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:39:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19770 states to 19770 states and 26756 transitions. [2021-11-06 14:39:09,514 INFO L78 Accepts]: Start accepts. Automaton has 19770 states and 26756 transitions. Word has length 196 [2021-11-06 14:39:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:39:09,515 INFO L470 AbstractCegarLoop]: Abstraction has 19770 states and 26756 transitions. [2021-11-06 14:39:09,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.3) internal successors, (189), 29 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:39:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 19770 states and 26756 transitions. [2021-11-06 14:39:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-06 14:39:09,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:39:09,546 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:39:09,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-06 14:39:09,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:39:09,771 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:39:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:39:09,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1113053953, now seen corresponding path program 17 times [2021-11-06 14:39:09,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:39:09,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521331805] [2021-11-06 14:39:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:39:09,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:39:09,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:39:09,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260948671] [2021-11-06 14:39:09,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 14:39:09,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:39:09,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:39:09,800 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:39:09,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-06 14:42:20,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-11-06 14:42:20,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:42:20,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-06 14:42:20,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:42:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:42:21,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:42:21,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521331805] [2021-11-06 14:42:21,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:42:21,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260948671] [2021-11-06 14:42:21,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260948671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:42:21,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:42:21,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-06 14:42:21,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339365324] [2021-11-06 14:42:21,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-06 14:42:21,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:42:21,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-06 14:42:21,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-06 14:42:21,161 INFO L87 Difference]: Start difference. First operand 19770 states and 26756 transitions. Second operand has 31 states, 31 states have (on average 6.225806451612903) internal successors, (193), 30 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:42:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:42:24,631 INFO L93 Difference]: Finished difference Result 19803 states and 26793 transitions. [2021-11-06 14:42:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-06 14:42:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.225806451612903) internal successors, (193), 30 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-06 14:42:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:42:24,682 INFO L225 Difference]: With dead ends: 19803 [2021-11-06 14:42:24,682 INFO L226 Difference]: Without dead ends: 19795 [2021-11-06 14:42:24,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-06 14:42:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19795 states. [2021-11-06 14:42:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19795 to 19783. [2021-11-06 14:42:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19783 states, 19782 states have (on average 1.3533009806895158) internal successors, (26771), 19782 states have internal predecessors, (26771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:42:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19783 states to 19783 states and 26771 transitions. [2021-11-06 14:42:26,967 INFO L78 Accepts]: Start accepts. Automaton has 19783 states and 26771 transitions. Word has length 200 [2021-11-06 14:42:26,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:42:26,968 INFO L470 AbstractCegarLoop]: Abstraction has 19783 states and 26771 transitions. [2021-11-06 14:42:26,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.225806451612903) internal successors, (193), 30 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:42:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 19783 states and 26771 transitions. [2021-11-06 14:42:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-06 14:42:26,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:42:26,998 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:42:27,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-06 14:42:27,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:42:27,219 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:42:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:42:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash 695384862, now seen corresponding path program 18 times [2021-11-06 14:42:27,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:42:27,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716761392] [2021-11-06 14:42:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:42:27,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:42:27,268 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:42:27,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374354831] [2021-11-06 14:42:27,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-06 14:42:27,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:42:27,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:42:27,289 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:42:27,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-06 14:43:01,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-06 14:43:01,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:43:01,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-06 14:43:01,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:43:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1553 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:43:02,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:02,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716761392] [2021-11-06 14:43:02,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:43:02,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374354831] [2021-11-06 14:43:02,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374354831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:43:02,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:43:02,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-06 14:43:02,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64010388] [2021-11-06 14:43:02,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-06 14:43:02,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:02,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-06 14:43:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-06 14:43:02,734 INFO L87 Difference]: Start difference. First operand 19783 states and 26771 transitions. Second operand has 32 states, 32 states have (on average 6.15625) internal successors, (197), 31 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:06,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:06,156 INFO L93 Difference]: Finished difference Result 19816 states and 26808 transitions. [2021-11-06 14:43:06,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-06 14:43:06,157 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.15625) internal successors, (197), 31 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-06 14:43:06,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:06,191 INFO L225 Difference]: With dead ends: 19816 [2021-11-06 14:43:06,191 INFO L226 Difference]: Without dead ends: 19808 [2021-11-06 14:43:06,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-06 14:43:06,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19808 states. [2021-11-06 14:43:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19808 to 19796. [2021-11-06 14:43:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19796 states, 19795 states have (on average 1.3531699924223288) internal successors, (26786), 19795 states have internal predecessors, (26786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19796 states to 19796 states and 26786 transitions. [2021-11-06 14:43:08,102 INFO L78 Accepts]: Start accepts. Automaton has 19796 states and 26786 transitions. Word has length 204 [2021-11-06 14:43:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:08,102 INFO L470 AbstractCegarLoop]: Abstraction has 19796 states and 26786 transitions. [2021-11-06 14:43:08,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.15625) internal successors, (197), 31 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 19796 states and 26786 transitions. [2021-11-06 14:43:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-06 14:43:08,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:08,131 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:43:08,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-06 14:43:08,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-06 14:43:08,337 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:08,337 INFO L85 PathProgramCache]: Analyzing trace with hash -474535491, now seen corresponding path program 19 times [2021-11-06 14:43:08,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:08,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471623423] [2021-11-06 14:43:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:08,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:08,362 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:43:08,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793066231] [2021-11-06 14:43:08,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-06 14:43:08,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:43:08,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:43:08,364 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:43:08,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-06 14:43:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:10,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-06 14:43:10,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:43:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1666 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:43:12,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:12,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471623423] [2021-11-06 14:43:12,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:43:12,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793066231] [2021-11-06 14:43:12,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793066231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:43:12,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:43:12,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-06 14:43:12,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173493994] [2021-11-06 14:43:12,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-06 14:43:12,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:12,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-06 14:43:12,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-06 14:43:12,094 INFO L87 Difference]: Start difference. First operand 19796 states and 26786 transitions. Second operand has 33 states, 33 states have (on average 6.090909090909091) internal successors, (201), 32 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:15,823 INFO L93 Difference]: Finished difference Result 19829 states and 26823 transitions. [2021-11-06 14:43:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-06 14:43:15,824 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.090909090909091) internal successors, (201), 32 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-06 14:43:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:15,856 INFO L225 Difference]: With dead ends: 19829 [2021-11-06 14:43:15,856 INFO L226 Difference]: Without dead ends: 19821 [2021-11-06 14:43:15,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-06 14:43:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19821 states. [2021-11-06 14:43:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19821 to 19809. [2021-11-06 14:43:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19809 states, 19808 states have (on average 1.3530391760904685) internal successors, (26801), 19808 states have internal predecessors, (26801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19809 states to 19809 states and 26801 transitions. [2021-11-06 14:43:17,809 INFO L78 Accepts]: Start accepts. Automaton has 19809 states and 26801 transitions. Word has length 208 [2021-11-06 14:43:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:17,809 INFO L470 AbstractCegarLoop]: Abstraction has 19809 states and 26801 transitions. [2021-11-06 14:43:17,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.090909090909091) internal successors, (201), 32 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:17,809 INFO L276 IsEmpty]: Start isEmpty. Operand 19809 states and 26801 transitions. [2021-11-06 14:43:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-06 14:43:17,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:17,833 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:43:17,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-06 14:43:18,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-06 14:43:18,047 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:18,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:18,048 INFO L85 PathProgramCache]: Analyzing trace with hash -220909348, now seen corresponding path program 20 times [2021-11-06 14:43:18,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:18,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838454815] [2021-11-06 14:43:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:18,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:18,072 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:43:18,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958631165] [2021-11-06 14:43:18,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:43:18,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:43:18,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:43:18,074 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:43:18,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-06 14:43:20,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:43:20,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:43:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-06 14:43:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:43:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1783 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:43:21,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:21,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838454815] [2021-11-06 14:43:21,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:43:21,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958631165] [2021-11-06 14:43:21,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958631165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:43:21,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:43:21,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-06 14:43:21,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698603473] [2021-11-06 14:43:21,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-06 14:43:21,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:21,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-06 14:43:21,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-06 14:43:21,868 INFO L87 Difference]: Start difference. First operand 19809 states and 26801 transitions. Second operand has 34 states, 34 states have (on average 6.029411764705882) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:24,499 INFO L93 Difference]: Finished difference Result 19842 states and 26838 transitions. [2021-11-06 14:43:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-06 14:43:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.029411764705882) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2021-11-06 14:43:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:24,529 INFO L225 Difference]: With dead ends: 19842 [2021-11-06 14:43:24,530 INFO L226 Difference]: Without dead ends: 19834 [2021-11-06 14:43:24,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-06 14:43:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19834 states. [2021-11-06 14:43:26,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19834 to 19822. [2021-11-06 14:43:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19822 states, 19821 states have (on average 1.3529085313556328) internal successors, (26816), 19821 states have internal predecessors, (26816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19822 states to 19822 states and 26816 transitions. [2021-11-06 14:43:26,377 INFO L78 Accepts]: Start accepts. Automaton has 19822 states and 26816 transitions. Word has length 212 [2021-11-06 14:43:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:26,377 INFO L470 AbstractCegarLoop]: Abstraction has 19822 states and 26816 transitions. [2021-11-06 14:43:26,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.029411764705882) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 19822 states and 26816 transitions. [2021-11-06 14:43:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-06 14:43:26,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:26,404 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:43:26,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-06 14:43:26,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-06 14:43:26,620 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:26,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1488154501, now seen corresponding path program 21 times [2021-11-06 14:43:26,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:26,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375749148] [2021-11-06 14:43:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:26,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:26,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:43:26,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511407162] [2021-11-06 14:43:26,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:43:26,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:43:26,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:43:26,654 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:43:26,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-06 14:43:41,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-11-06 14:43:41,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:43:41,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-06 14:43:41,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:43:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1904 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:43:42,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:42,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375749148] [2021-11-06 14:43:42,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:43:42,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511407162] [2021-11-06 14:43:42,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511407162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:43:42,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:43:42,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-06 14:43:42,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220378754] [2021-11-06 14:43:42,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-06 14:43:42,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:42,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-06 14:43:42,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-06 14:43:42,259 INFO L87 Difference]: Start difference. First operand 19822 states and 26816 transitions. Second operand has 35 states, 35 states have (on average 5.9714285714285715) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:45,202 INFO L93 Difference]: Finished difference Result 19855 states and 26853 transitions. [2021-11-06 14:43:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-06 14:43:45,203 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.9714285714285715) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-06 14:43:45,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:45,238 INFO L225 Difference]: With dead ends: 19855 [2021-11-06 14:43:45,238 INFO L226 Difference]: Without dead ends: 19847 [2021-11-06 14:43:45,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-06 14:43:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19847 states. [2021-11-06 14:43:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19847 to 19835. [2021-11-06 14:43:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19835 states, 19834 states have (on average 1.3527780578804074) internal successors, (26831), 19834 states have internal predecessors, (26831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19835 states to 19835 states and 26831 transitions. [2021-11-06 14:43:47,296 INFO L78 Accepts]: Start accepts. Automaton has 19835 states and 26831 transitions. Word has length 216 [2021-11-06 14:43:47,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:47,297 INFO L470 AbstractCegarLoop]: Abstraction has 19835 states and 26831 transitions. [2021-11-06 14:43:47,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.9714285714285715) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 19835 states and 26831 transitions. [2021-11-06 14:43:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-06 14:43:47,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:47,326 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:43:47,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-06 14:43:47,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:43:47,530 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:47,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:47,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1950545766, now seen corresponding path program 22 times [2021-11-06 14:43:47,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:47,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570868674] [2021-11-06 14:43:47,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:47,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:47,564 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:43:47,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329957135] [2021-11-06 14:43:47,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 14:43:47,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:43:47,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:43:47,566 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:43:47,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-06 14:43:50,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 14:43:50,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:43:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-06 14:43:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:43:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:43:51,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:51,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570868674] [2021-11-06 14:43:51,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:43:51,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329957135] [2021-11-06 14:43:51,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329957135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:43:51,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:43:51,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-06 14:43:51,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730616574] [2021-11-06 14:43:51,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-06 14:43:51,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:51,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-06 14:43:51,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-06 14:43:51,878 INFO L87 Difference]: Start difference. First operand 19835 states and 26831 transitions. Second operand has 36 states, 36 states have (on average 5.916666666666667) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:55,765 INFO L93 Difference]: Finished difference Result 19868 states and 26868 transitions. [2021-11-06 14:43:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-06 14:43:55,767 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.916666666666667) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-11-06 14:43:55,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:55,835 INFO L225 Difference]: With dead ends: 19868 [2021-11-06 14:43:55,835 INFO L226 Difference]: Without dead ends: 19860 [2021-11-06 14:43:55,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-06 14:43:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19860 states. [2021-11-06 14:43:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19860 to 19848. [2021-11-06 14:43:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19848 states, 19847 states have (on average 1.3526477553282612) internal successors, (26846), 19847 states have internal predecessors, (26846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19848 states to 19848 states and 26846 transitions. [2021-11-06 14:43:57,810 INFO L78 Accepts]: Start accepts. Automaton has 19848 states and 26846 transitions. Word has length 220 [2021-11-06 14:43:57,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:57,810 INFO L470 AbstractCegarLoop]: Abstraction has 19848 states and 26846 transitions. [2021-11-06 14:43:57,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.916666666666667) internal successors, (213), 35 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 19848 states and 26846 transitions. [2021-11-06 14:43:57,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-06 14:43:57,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:57,837 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:43:57,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-06 14:43:58,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:43:58,051 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:58,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1424382265, now seen corresponding path program 23 times [2021-11-06 14:43:58,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:58,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323408091] [2021-11-06 14:43:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:58,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:58,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:43:58,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376698305] [2021-11-06 14:43:58,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 14:43:58,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:43:58,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:43:58,097 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:43:58,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process Killed by 15