./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6698dfe763688c38a478c53cfe3bc6bac092e445bf13ef44be53eb6068218c93 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 17:03:40,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 17:03:40,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 17:03:40,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 17:03:40,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 17:03:40,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 17:03:40,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 17:03:40,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 17:03:40,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 17:03:40,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 17:03:40,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 17:03:40,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 17:03:40,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 17:03:40,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 17:03:40,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 17:03:40,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 17:03:40,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 17:03:40,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 17:03:40,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 17:03:40,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 17:03:40,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 17:03:40,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 17:03:40,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 17:03:40,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 17:03:40,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 17:03:40,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 17:03:40,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 17:03:40,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 17:03:40,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 17:03:40,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 17:03:40,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 17:03:40,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 17:03:40,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 17:03:40,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 17:03:40,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 17:03:40,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 17:03:40,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 17:03:40,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 17:03:40,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 17:03:40,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 17:03:40,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 17:03:40,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-18 17:03:40,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 17:03:40,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 17:03:40,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 17:03:40,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 17:03:40,464 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 17:03:40,465 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 17:03:40,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 17:03:40,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 17:03:40,465 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 17:03:40,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 17:03:40,466 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 17:03:40,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 17:03:40,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 17:03:40,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 17:03:40,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 17:03:40,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 17:03:40,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 17:03:40,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 17:03:40,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 17:03:40,467 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 17:03:40,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 17:03:40,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 17:03:40,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 17:03:40,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 17:03:40,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 17:03:40,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 17:03:40,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 17:03:40,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 17:03:40,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 17:03:40,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 17:03:40,470 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 17:03:40,470 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 17:03:40,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 17:03:40,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 17:03:40,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6698dfe763688c38a478c53cfe3bc6bac092e445bf13ef44be53eb6068218c93 [2021-12-18 17:03:40,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 17:03:40,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 17:03:40,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 17:03:40,666 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 17:03:40,667 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 17:03:40,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i [2021-12-18 17:03:40,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb2edd67d/8d239061cf4b49fab24e5fa0142efbd9/FLAG5f9f53a0e [2021-12-18 17:03:41,266 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 17:03:41,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i [2021-12-18 17:03:41,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb2edd67d/8d239061cf4b49fab24e5fa0142efbd9/FLAG5f9f53a0e [2021-12-18 17:03:41,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb2edd67d/8d239061cf4b49fab24e5fa0142efbd9 [2021-12-18 17:03:41,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 17:03:41,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 17:03:41,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 17:03:41,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 17:03:41,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 17:03:41,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 05:03:41" (1/1) ... [2021-12-18 17:03:41,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fd94542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:41, skipping insertion in model container [2021-12-18 17:03:41,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 05:03:41" (1/1) ... [2021-12-18 17:03:41,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 17:03:41,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 17:03:42,095 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[33021,33034] [2021-12-18 17:03:42,268 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[84583,84596] [2021-12-18 17:03:42,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 17:03:42,277 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 17:03:42,306 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[33021,33034] [2021-12-18 17:03:42,417 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[84583,84596] [2021-12-18 17:03:42,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 17:03:42,447 INFO L208 MainTranslator]: Completed translation [2021-12-18 17:03:42,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42 WrapperNode [2021-12-18 17:03:42,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 17:03:42,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 17:03:42,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 17:03:42,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 17:03:42,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42" (1/1) ... [2021-12-18 17:03:42,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42" (1/1) ... [2021-12-18 17:03:42,598 INFO L137 Inliner]: procedures = 177, calls = 730, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2864 [2021-12-18 17:03:42,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 17:03:42,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 17:03:42,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 17:03:42,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 17:03:42,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42" (1/1) ... [2021-12-18 17:03:42,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42" (1/1) ... [2021-12-18 17:03:42,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42" (1/1) ... [2021-12-18 17:03:42,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42" (1/1) ... [2021-12-18 17:03:42,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42" (1/1) ... [2021-12-18 17:03:42,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42" (1/1) ... [2021-12-18 17:03:42,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42" (1/1) ... [2021-12-18 17:03:42,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 17:03:42,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 17:03:42,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 17:03:42,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 17:03:42,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42" (1/1) ... [2021-12-18 17:03:42,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 17:03:42,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:03:42,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 17:03:42,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 17:03:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 17:03:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 17:03:42,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 17:03:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 17:03:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-18 17:03:42,776 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-18 17:03:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 17:03:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 17:03:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 17:03:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 17:03:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-18 17:03:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 17:03:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 17:03:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 17:03:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 17:03:42,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 17:03:42,938 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 17:03:42,940 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 17:03:44,464 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 17:03:44,506 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 17:03:44,506 INFO L301 CfgBuilder]: Removed 54 assume(true) statements. [2021-12-18 17:03:44,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 05:03:44 BoogieIcfgContainer [2021-12-18 17:03:44,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 17:03:44,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 17:03:44,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 17:03:44,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 17:03:44,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 05:03:41" (1/3) ... [2021-12-18 17:03:44,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1809bc77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 05:03:44, skipping insertion in model container [2021-12-18 17:03:44,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:03:42" (2/3) ... [2021-12-18 17:03:44,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1809bc77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 05:03:44, skipping insertion in model container [2021-12-18 17:03:44,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 05:03:44" (3/3) ... [2021-12-18 17:03:44,519 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test9-1.i [2021-12-18 17:03:44,523 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 17:03:44,524 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-18 17:03:44,565 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 17:03:44,569 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 17:03:44,570 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-18 17:03:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 1167 states, 659 states have (on average 1.922610015174507) internal successors, (1267), 1161 states have internal predecessors, (1267), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 17:03:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 17:03:44,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:03:44,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:03:44,609 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:03:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:03:44,615 INFO L85 PathProgramCache]: Analyzing trace with hash -858764483, now seen corresponding path program 1 times [2021-12-18 17:03:44,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:03:44,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536074233] [2021-12-18 17:03:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:44,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:03:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:03:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:03:44,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:03:44,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536074233] [2021-12-18 17:03:44,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536074233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:03:44,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:03:44,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 17:03:44,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121257932] [2021-12-18 17:03:44,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:03:44,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 17:03:44,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:03:44,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 17:03:44,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 17:03:44,806 INFO L87 Difference]: Start difference. First operand has 1167 states, 659 states have (on average 1.922610015174507) internal successors, (1267), 1161 states have internal predecessors, (1267), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-12-18 17:03:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:03:44,923 INFO L93 Difference]: Finished difference Result 2332 states and 5044 transitions. [2021-12-18 17:03:44,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 17:03:44,926 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-12-18 17:03:44,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:03:44,952 INFO L225 Difference]: With dead ends: 2332 [2021-12-18 17:03:44,955 INFO L226 Difference]: Without dead ends: 1163 [2021-12-18 17:03:44,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 17:03:44,979 INFO L933 BasicCegarLoop]: 2213 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:03:44,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:03:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-12-18 17:03:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2021-12-18 17:03:45,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 656 states have (on average 1.833841463414634) internal successors, (1203), 1157 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 17:03:45,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2209 transitions. [2021-12-18 17:03:45,323 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2209 transitions. Word has length 9 [2021-12-18 17:03:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:03:45,324 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 2209 transitions. [2021-12-18 17:03:45,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-12-18 17:03:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2209 transitions. [2021-12-18 17:03:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 17:03:45,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:03:45,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:03:45,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 17:03:45,326 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:03:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:03:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash -293931519, now seen corresponding path program 1 times [2021-12-18 17:03:45,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:03:45,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488613890] [2021-12-18 17:03:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:45,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:03:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:03:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:03:45,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:03:45,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488613890] [2021-12-18 17:03:45,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488613890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:03:45,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:03:45,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 17:03:45,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578759376] [2021-12-18 17:03:45,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:03:45,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 17:03:45,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:03:45,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 17:03:45,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 17:03:45,432 INFO L87 Difference]: Start difference. First operand 1163 states and 2209 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-12-18 17:03:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:03:46,301 INFO L93 Difference]: Finished difference Result 3333 states and 6429 transitions. [2021-12-18 17:03:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 17:03:46,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2021-12-18 17:03:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:03:46,313 INFO L225 Difference]: With dead ends: 3333 [2021-12-18 17:03:46,314 INFO L226 Difference]: Without dead ends: 2264 [2021-12-18 17:03:46,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 17:03:46,319 INFO L933 BasicCegarLoop]: 2673 mSDtfsCounter, 1128 mSDsluCounter, 4315 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 6988 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 17:03:46,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1628 Valid, 6988 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 17:03:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-12-18 17:03:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1165. [2021-12-18 17:03:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 658 states have (on average 1.831306990881459) internal successors, (1205), 1159 states have internal predecessors, (1205), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 17:03:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2211 transitions. [2021-12-18 17:03:46,620 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2211 transitions. Word has length 44 [2021-12-18 17:03:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:03:46,621 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2211 transitions. [2021-12-18 17:03:46,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-12-18 17:03:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2211 transitions. [2021-12-18 17:03:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 17:03:46,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:03:46,624 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:03:46,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 17:03:46,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:03:46,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:03:46,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1509497837, now seen corresponding path program 1 times [2021-12-18 17:03:46,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:03:46,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158942846] [2021-12-18 17:03:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:46,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:03:46,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:03:46,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602761601] [2021-12-18 17:03:46,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:46,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:46,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:03:46,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:03:46,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 17:03:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:03:47,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 17:03:47,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:03:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:03:47,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:03:47,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:03:47,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158942846] [2021-12-18 17:03:47,326 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:03:47,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602761601] [2021-12-18 17:03:47,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602761601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:03:47,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:03:47,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 17:03:47,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384578854] [2021-12-18 17:03:47,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:03:47,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 17:03:47,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:03:47,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 17:03:47,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:03:47,327 INFO L87 Difference]: Start difference. First operand 1165 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-12-18 17:03:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:03:47,395 INFO L93 Difference]: Finished difference Result 2347 states and 4449 transitions. [2021-12-18 17:03:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 17:03:47,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2021-12-18 17:03:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:03:47,401 INFO L225 Difference]: With dead ends: 2347 [2021-12-18 17:03:47,401 INFO L226 Difference]: Without dead ends: 1186 [2021-12-18 17:03:47,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:03:47,408 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 9 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4363 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:03:47,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 4363 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:03:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-12-18 17:03:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1185. [2021-12-18 17:03:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 678 states have (on average 1.8067846607669618) internal successors, (1225), 1179 states have internal predecessors, (1225), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 17:03:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 2231 transitions. [2021-12-18 17:03:47,550 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 2231 transitions. Word has length 96 [2021-12-18 17:03:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:03:47,550 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 2231 transitions. [2021-12-18 17:03:47,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-12-18 17:03:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 2231 transitions. [2021-12-18 17:03:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 17:03:47,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:03:47,552 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:03:47,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 17:03:47,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:47,775 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:03:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:03:47,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1482432235, now seen corresponding path program 1 times [2021-12-18 17:03:47,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:03:47,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462825352] [2021-12-18 17:03:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:47,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:03:47,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:03:47,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882854027] [2021-12-18 17:03:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:47,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:03:47,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:03:47,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 17:03:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:03:48,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 17:03:48,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:03:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 17:03:48,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:03:48,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:03:48,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462825352] [2021-12-18 17:03:48,438 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:03:48,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882854027] [2021-12-18 17:03:48,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882854027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:03:48,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:03:48,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 17:03:48,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516718308] [2021-12-18 17:03:48,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:03:48,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 17:03:48,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:03:48,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 17:03:48,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:03:48,444 INFO L87 Difference]: Start difference. First operand 1185 states and 2231 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-12-18 17:03:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:03:48,524 INFO L93 Difference]: Finished difference Result 2274 states and 4348 transitions. [2021-12-18 17:03:48,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 17:03:48,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 96 [2021-12-18 17:03:48,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:03:48,531 INFO L225 Difference]: With dead ends: 2274 [2021-12-18 17:03:48,532 INFO L226 Difference]: Without dead ends: 1206 [2021-12-18 17:03:48,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:03:48,538 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 8 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4365 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:03:48,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 4365 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:03:48,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-12-18 17:03:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1205. [2021-12-18 17:03:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 698 states have (on average 1.7836676217765044) internal successors, (1245), 1199 states have internal predecessors, (1245), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 17:03:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 2251 transitions. [2021-12-18 17:03:48,688 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 2251 transitions. Word has length 96 [2021-12-18 17:03:48,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:03:48,688 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 2251 transitions. [2021-12-18 17:03:48,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2021-12-18 17:03:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 2251 transitions. [2021-12-18 17:03:48,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 17:03:48,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:03:48,690 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:03:48,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 17:03:48,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-18 17:03:48,904 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:03:48,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:03:48,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1801417811, now seen corresponding path program 1 times [2021-12-18 17:03:48,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:03:48,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489405155] [2021-12-18 17:03:48,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:48,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:03:48,957 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:03:48,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820293244] [2021-12-18 17:03:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:48,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:48,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:03:48,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:03:48,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 17:03:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:03:49,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 17:03:49,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:03:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:03:49,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:03:49,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:03:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489405155] [2021-12-18 17:03:49,635 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:03:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820293244] [2021-12-18 17:03:49,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820293244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:03:49,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:03:49,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 17:03:49,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146051232] [2021-12-18 17:03:49,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:03:49,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 17:03:49,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:03:49,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 17:03:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 17:03:49,637 INFO L87 Difference]: Start difference. First operand 1205 states and 2251 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-12-18 17:03:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:03:49,714 INFO L93 Difference]: Finished difference Result 2398 states and 4490 transitions. [2021-12-18 17:03:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 17:03:49,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 96 [2021-12-18 17:03:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:03:49,720 INFO L225 Difference]: With dead ends: 2398 [2021-12-18 17:03:49,720 INFO L226 Difference]: Without dead ends: 1197 [2021-12-18 17:03:49,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 17:03:49,725 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 1182 mSDsluCounter, 2697 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 4886 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:03:49,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1685 Valid, 4886 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:03:49,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-12-18 17:03:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1191. [2021-12-18 17:03:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 684 states have (on average 1.7894736842105263) internal successors, (1224), 1185 states have internal predecessors, (1224), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 17:03:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2230 transitions. [2021-12-18 17:03:49,859 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2230 transitions. Word has length 96 [2021-12-18 17:03:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:03:49,860 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 2230 transitions. [2021-12-18 17:03:49,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-12-18 17:03:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2230 transitions. [2021-12-18 17:03:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 17:03:49,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:03:49,862 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:03:49,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 17:03:50,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:50,080 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:03:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:03:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash 432450363, now seen corresponding path program 1 times [2021-12-18 17:03:50,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:03:50,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397845161] [2021-12-18 17:03:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:50,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:03:50,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:03:50,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75988099] [2021-12-18 17:03:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:50,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:50,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:03:50,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:03:50,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 17:03:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:03:50,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 17:03:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:03:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 17:03:50,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:03:50,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:03:50,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397845161] [2021-12-18 17:03:50,886 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:03:50,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75988099] [2021-12-18 17:03:50,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75988099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:03:50,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:03:50,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 17:03:50,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801372226] [2021-12-18 17:03:50,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:03:50,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 17:03:50,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:03:50,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 17:03:50,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 17:03:50,888 INFO L87 Difference]: Start difference. First operand 1191 states and 2230 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2021-12-18 17:03:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:03:50,987 INFO L93 Difference]: Finished difference Result 2271 states and 4328 transitions. [2021-12-18 17:03:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 17:03:50,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 96 [2021-12-18 17:03:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:03:50,994 INFO L225 Difference]: With dead ends: 2271 [2021-12-18 17:03:50,994 INFO L226 Difference]: Without dead ends: 1183 [2021-12-18 17:03:50,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 17:03:50,999 INFO L933 BasicCegarLoop]: 2180 mSDtfsCounter, 1076 mSDsluCounter, 2793 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 4973 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:03:50,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1576 Valid, 4973 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:03:51,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-12-18 17:03:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1177. [2021-12-18 17:03:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 670 states have (on average 1.7955223880597015) internal successors, (1203), 1171 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 17:03:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2209 transitions. [2021-12-18 17:03:51,156 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2209 transitions. Word has length 96 [2021-12-18 17:03:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:03:51,156 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 2209 transitions. [2021-12-18 17:03:51,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2021-12-18 17:03:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2209 transitions. [2021-12-18 17:03:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 17:03:51,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:03:51,157 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:03:51,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 17:03:51,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:51,371 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:03:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:03:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash -725158097, now seen corresponding path program 1 times [2021-12-18 17:03:51,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:03:51,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932578465] [2021-12-18 17:03:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:51,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:03:51,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:03:51,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279726392] [2021-12-18 17:03:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:51,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:03:51,436 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:03:51,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 17:03:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:03:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 17:03:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:03:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:03:52,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:03:52,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:03:52,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932578465] [2021-12-18 17:03:52,255 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:03:52,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279726392] [2021-12-18 17:03:52,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279726392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:03:52,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:03:52,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 17:03:52,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330654554] [2021-12-18 17:03:52,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:03:52,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 17:03:52,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:03:52,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 17:03:52,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:03:52,257 INFO L87 Difference]: Start difference. First operand 1177 states and 2209 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-12-18 17:03:52,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:03:52,396 INFO L93 Difference]: Finished difference Result 3446 states and 6522 transitions. [2021-12-18 17:03:52,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 17:03:52,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2021-12-18 17:03:52,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:03:52,409 INFO L225 Difference]: With dead ends: 3446 [2021-12-18 17:03:52,410 INFO L226 Difference]: Without dead ends: 2273 [2021-12-18 17:03:52,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:03:52,416 INFO L933 BasicCegarLoop]: 2736 mSDtfsCounter, 1065 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 4911 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 17:03:52,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 4911 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 17:03:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-12-18 17:03:52,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2271. [2021-12-18 17:03:52,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 1264 states have (on average 1.8259493670886076) internal successors, (2308), 2265 states have internal predecessors, (2308), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-12-18 17:03:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 4314 transitions. [2021-12-18 17:03:52,696 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 4314 transitions. Word has length 96 [2021-12-18 17:03:52,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:03:52,696 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 4314 transitions. [2021-12-18 17:03:52,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-12-18 17:03:52,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 4314 transitions. [2021-12-18 17:03:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-18 17:03:52,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:03:52,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:03:52,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 17:03:52,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:52,914 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:03:52,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:03:52,914 INFO L85 PathProgramCache]: Analyzing trace with hash 372571869, now seen corresponding path program 1 times [2021-12-18 17:03:52,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:03:52,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843053522] [2021-12-18 17:03:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:52,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:03:52,957 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:03:52,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847211100] [2021-12-18 17:03:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:52,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:52,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:03:52,972 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:03:52,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 17:03:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:03:53,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 17:03:53,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:03:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 17:03:53,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:03:53,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:03:53,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843053522] [2021-12-18 17:03:53,664 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:03:53,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847211100] [2021-12-18 17:03:53,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847211100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:03:53,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:03:53,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 17:03:53,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225787301] [2021-12-18 17:03:53,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:03:53,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 17:03:53,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:03:53,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 17:03:53,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 17:03:53,666 INFO L87 Difference]: Start difference. First operand 2271 states and 4314 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 17:03:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:03:54,708 INFO L93 Difference]: Finished difference Result 3444 states and 6519 transitions. [2021-12-18 17:03:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 17:03:54,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-12-18 17:03:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:03:54,714 INFO L225 Difference]: With dead ends: 3444 [2021-12-18 17:03:54,714 INFO L226 Difference]: Without dead ends: 1221 [2021-12-18 17:03:54,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 17:03:54,722 INFO L933 BasicCegarLoop]: 2201 mSDtfsCounter, 2254 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2254 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 17:03:54,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2254 Valid, 3272 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 17:03:54,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-12-18 17:03:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2021-12-18 17:03:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 714 states have (on average 1.7507002801120448) internal successors, (1250), 1215 states have internal predecessors, (1250), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-18 17:03:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2256 transitions. [2021-12-18 17:03:54,885 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2256 transitions. Word has length 111 [2021-12-18 17:03:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:03:54,887 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 2256 transitions. [2021-12-18 17:03:54,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 17:03:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2256 transitions. [2021-12-18 17:03:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-18 17:03:54,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:03:54,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:03:54,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 17:03:55,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:55,108 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:03:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:03:55,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2029466899, now seen corresponding path program 1 times [2021-12-18 17:03:55,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:03:55,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251624624] [2021-12-18 17:03:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:55,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:03:55,143 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:03:55,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404270884] [2021-12-18 17:03:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:03:55,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:03:55,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:03:55,145 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:03:55,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 17:04:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:04:02,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 17:04:02,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:04:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 17:04:02,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:04:02,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:04:02,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251624624] [2021-12-18 17:04:02,556 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:04:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404270884] [2021-12-18 17:04:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404270884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:04:02,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:04:02,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 17:04:02,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686306717] [2021-12-18 17:04:02,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:04:02,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 17:04:02,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:04:02,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 17:04:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 17:04:02,559 INFO L87 Difference]: Start difference. First operand 1221 states and 2256 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 17:04:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:04:02,623 INFO L93 Difference]: Finished difference Result 2394 states and 4461 transitions. [2021-12-18 17:04:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 17:04:02,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2021-12-18 17:04:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:04:02,629 INFO L225 Difference]: With dead ends: 2394 [2021-12-18 17:04:02,630 INFO L226 Difference]: Without dead ends: 1224 [2021-12-18 17:04:02,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 17:04:02,635 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 2 mSDsluCounter, 4378 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6569 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:04:02,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6569 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:04:02,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-12-18 17:04:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1224. [2021-12-18 17:04:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 716 states have (on average 1.75) internal successors, (1253), 1218 states have internal predecessors, (1253), 503 states have call successors, (503), 2 states have call predecessors, (503), 3 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-18 17:04:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2260 transitions. [2021-12-18 17:04:02,748 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2260 transitions. Word has length 118 [2021-12-18 17:04:02,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:04:02,748 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 2260 transitions. [2021-12-18 17:04:02,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 17:04:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2260 transitions. [2021-12-18 17:04:02,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 17:04:02,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:04:02,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:04:02,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 17:04:02,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:04:02,963 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:04:02,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:04:02,964 INFO L85 PathProgramCache]: Analyzing trace with hash -629194827, now seen corresponding path program 1 times [2021-12-18 17:04:02,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:04:02,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003622427] [2021-12-18 17:04:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:04:02,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:04:02,994 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:04:02,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120320475] [2021-12-18 17:04:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:04:02,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:04:02,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:04:02,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:04:02,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 17:04:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:04:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 17:04:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:04:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 17:04:03,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 17:04:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 17:04:03,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:04:03,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003622427] [2021-12-18 17:04:03,976 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:04:03,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120320475] [2021-12-18 17:04:03,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120320475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 17:04:03,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 17:04:03,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-18 17:04:03,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037712827] [2021-12-18 17:04:03,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 17:04:03,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 17:04:03,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:04:03,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 17:04:03,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 17:04:03,977 INFO L87 Difference]: Start difference. First operand 1224 states and 2260 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 17:04:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:04:04,125 INFO L93 Difference]: Finished difference Result 2408 states and 4482 transitions. [2021-12-18 17:04:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 17:04:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2021-12-18 17:04:04,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:04:04,133 INFO L225 Difference]: With dead ends: 2408 [2021-12-18 17:04:04,134 INFO L226 Difference]: Without dead ends: 1235 [2021-12-18 17:04:04,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-18 17:04:04,140 INFO L933 BasicCegarLoop]: 2192 mSDtfsCounter, 12 mSDsluCounter, 8754 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10946 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:04:04,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 10946 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:04:04,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-12-18 17:04:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1233. [2021-12-18 17:04:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 724 states have (on average 1.75) internal successors, (1267), 1226 states have internal predecessors, (1267), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-18 17:04:04,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2274 transitions. [2021-12-18 17:04:04,264 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2274 transitions. Word has length 120 [2021-12-18 17:04:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:04:04,264 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 2274 transitions. [2021-12-18 17:04:04,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 17:04:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2274 transitions. [2021-12-18 17:04:04,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-18 17:04:04,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:04:04,266 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:04:04,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 17:04:04,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-18 17:04:04,488 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:04:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:04:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2085572205, now seen corresponding path program 2 times [2021-12-18 17:04:04,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:04:04,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110232393] [2021-12-18 17:04:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:04:04,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:04:04,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:04:04,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46207804] [2021-12-18 17:04:04,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 17:04:04,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:04:04,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:04:04,522 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:04:04,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 17:04:05,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 17:04:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 17:04:05,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 17:04:05,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:04:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 17:04:05,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 17:04:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 17:04:05,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:04:05,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110232393] [2021-12-18 17:04:05,739 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:04:05,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46207804] [2021-12-18 17:04:05,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46207804] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 17:04:05,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 17:04:05,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-12-18 17:04:05,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274626194] [2021-12-18 17:04:05,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 17:04:05,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 17:04:05,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:04:05,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 17:04:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-12-18 17:04:05,742 INFO L87 Difference]: Start difference. First operand 1233 states and 2274 transitions. Second operand has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 17:04:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:04:06,540 INFO L93 Difference]: Finished difference Result 2428 states and 4512 transitions. [2021-12-18 17:04:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 17:04:06,541 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2021-12-18 17:04:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:04:06,547 INFO L225 Difference]: With dead ends: 2428 [2021-12-18 17:04:06,547 INFO L226 Difference]: Without dead ends: 1246 [2021-12-18 17:04:06,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-12-18 17:04:06,552 INFO L933 BasicCegarLoop]: 2193 mSDtfsCounter, 65 mSDsluCounter, 17492 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 19685 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 17:04:06,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 19685 Invalid, 292 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [45 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 17:04:06,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-12-18 17:04:06,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1242. [2021-12-18 17:04:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 733 states have (on average 1.7407912687585265) internal successors, (1276), 1235 states have internal predecessors, (1276), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-18 17:04:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 2283 transitions. [2021-12-18 17:04:06,677 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 2283 transitions. Word has length 124 [2021-12-18 17:04:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:04:06,678 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 2283 transitions. [2021-12-18 17:04:06,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 17:04:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 2283 transitions. [2021-12-18 17:04:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-18 17:04:06,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:04:06,679 INFO L514 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:04:06,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 17:04:06,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:04:06,895 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:04:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:04:06,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1787625005, now seen corresponding path program 3 times [2021-12-18 17:04:06,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:04:06,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869977079] [2021-12-18 17:04:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:04:06,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:04:06,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:04:06,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684404392] [2021-12-18 17:04:06,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 17:04:06,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:04:06,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:04:06,953 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:04:06,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 17:04:50,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 17:04:50,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 17:04:50,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-18 17:04:50,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:04:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-18 17:04:50,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 17:04:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-18 17:04:50,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:04:50,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869977079] [2021-12-18 17:04:50,466 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:04:50,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684404392] [2021-12-18 17:04:50,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684404392] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 17:04:50,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 17:04:50,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-18 17:04:50,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643655693] [2021-12-18 17:04:50,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 17:04:50,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 17:04:50,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:04:50,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 17:04:50,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-18 17:04:50,468 INFO L87 Difference]: Start difference. First operand 1242 states and 2283 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 17:04:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:04:50,777 INFO L93 Difference]: Finished difference Result 2423 states and 4498 transitions. [2021-12-18 17:04:50,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 17:04:50,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 130 [2021-12-18 17:04:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:04:50,783 INFO L225 Difference]: With dead ends: 2423 [2021-12-18 17:04:50,783 INFO L226 Difference]: Without dead ends: 1247 [2021-12-18 17:04:50,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-12-18 17:04:50,789 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 29 mSDsluCounter, 13118 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 15309 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 17:04:50,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 15309 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 17:04:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-12-18 17:04:50,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1243. [2021-12-18 17:04:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 734 states have (on average 1.7384196185286103) internal successors, (1276), 1236 states have internal predecessors, (1276), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-18 17:04:50,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 2283 transitions. [2021-12-18 17:04:50,931 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 2283 transitions. Word has length 130 [2021-12-18 17:04:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:04:50,931 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 2283 transitions. [2021-12-18 17:04:50,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 17:04:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 2283 transitions. [2021-12-18 17:04:50,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-18 17:04:50,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:04:50,933 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:04:50,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 17:04:51,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-18 17:04:51,147 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:04:51,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:04:51,148 INFO L85 PathProgramCache]: Analyzing trace with hash 761434067, now seen corresponding path program 4 times [2021-12-18 17:04:51,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:04:51,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780419060] [2021-12-18 17:04:51,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:04:51,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:04:51,186 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:04:51,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154684315] [2021-12-18 17:04:51,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 17:04:51,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:04:51,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:04:51,188 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:04:51,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 17:04:52,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 17:04:52,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 17:04:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 17:04:52,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:04:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 81 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-18 17:04:52,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 17:04:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 81 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-18 17:04:52,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:04:52,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780419060] [2021-12-18 17:04:52,904 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:04:52,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154684315] [2021-12-18 17:04:52,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154684315] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 17:04:52,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 17:04:52,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-12-18 17:04:52,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745911081] [2021-12-18 17:04:52,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 17:04:52,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 17:04:52,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:04:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 17:04:52,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-12-18 17:04:52,907 INFO L87 Difference]: Start difference. First operand 1243 states and 2283 transitions. Second operand has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 17:04:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:04:56,452 INFO L93 Difference]: Finished difference Result 2475 states and 4559 transitions. [2021-12-18 17:04:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 17:04:56,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 134 [2021-12-18 17:04:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:04:56,458 INFO L225 Difference]: With dead ends: 2475 [2021-12-18 17:04:56,458 INFO L226 Difference]: Without dead ends: 1237 [2021-12-18 17:04:56,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=399, Invalid=1007, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 17:04:56,462 INFO L933 BasicCegarLoop]: 2168 mSDtfsCounter, 1248 mSDsluCounter, 18986 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 21154 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:04:56,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1754 Valid, 21154 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 17:04:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-12-18 17:04:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1233. [2021-12-18 17:04:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 724 states have (on average 1.7430939226519337) internal successors, (1262), 1226 states have internal predecessors, (1262), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-18 17:04:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2269 transitions. [2021-12-18 17:04:56,567 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2269 transitions. Word has length 134 [2021-12-18 17:04:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:04:56,568 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 2269 transitions. [2021-12-18 17:04:56,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 17:04:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2269 transitions. [2021-12-18 17:04:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-18 17:04:56,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:04:56,569 INFO L514 BasicCegarLoop]: trace histogram [24, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:04:56,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 17:04:56,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-18 17:04:56,786 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:04:56,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:04:56,787 INFO L85 PathProgramCache]: Analyzing trace with hash 895265747, now seen corresponding path program 5 times [2021-12-18 17:04:56,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:04:56,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817699486] [2021-12-18 17:04:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:04:56,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:04:56,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:04:56,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493652936] [2021-12-18 17:04:56,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 17:04:56,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:04:56,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:04:56,829 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 17:04:56,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process Killed by 15