./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test1-1.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_FNV_test1-1.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 72c3cbe0b435a963730c7c79c0d825f3c978c53ad7cc61822ef9417e2e6ee67f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 17:05:19,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 17:05:19,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 17:05:19,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 17:05:19,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 17:05:19,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 17:05:19,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 17:05:19,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 17:05:19,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 17:05:19,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 17:05:19,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 17:05:19,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 17:05:19,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 17:05:19,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 17:05:19,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 17:05:19,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 17:05:19,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 17:05:19,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 17:05:19,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 17:05:19,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 17:05:19,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 17:05:19,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 17:05:19,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 17:05:19,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 17:05:19,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 17:05:19,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 17:05:19,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 17:05:19,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 17:05:19,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 17:05:19,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 17:05:19,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 17:05:19,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 17:05:19,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 17:05:19,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 17:05:19,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 17:05:19,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 17:05:19,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 17:05:19,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 17:05:19,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 17:05:19,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 17:05:19,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 17:05:19,398 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-18 17:05:19,417 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 17:05:19,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 17:05:19,419 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 17:05:19,419 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 17:05:19,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 17:05:19,420 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 17:05:19,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 17:05:19,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 17:05:19,421 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 17:05:19,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 17:05:19,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 17:05:19,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 17:05:19,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 17:05:19,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 17:05:19,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 17:05:19,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 17:05:19,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 17:05:19,422 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 17:05:19,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 17:05:19,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 17:05:19,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 17:05:19,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 17:05:19,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 17:05:19,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 17:05:19,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 17:05:19,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 17:05:19,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 17:05:19,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 17:05:19,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 17:05:19,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 17:05:19,424 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 17:05:19,424 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 17:05:19,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 17:05:19,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 17:05:19,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72c3cbe0b435a963730c7c79c0d825f3c978c53ad7cc61822ef9417e2e6ee67f [2021-12-18 17:05:19,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 17:05:19,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 17:05:19,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 17:05:19,609 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 17:05:19,609 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 17:05:19,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test1-1.i [2021-12-18 17:05:19,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19637fb94/0943ccda34814f44ba06f816ad11cea8/FLAG143374b3c [2021-12-18 17:05:20,083 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 17:05:20,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test1-1.i [2021-12-18 17:05:20,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19637fb94/0943ccda34814f44ba06f816ad11cea8/FLAG143374b3c [2021-12-18 17:05:20,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19637fb94/0943ccda34814f44ba06f816ad11cea8 [2021-12-18 17:05:20,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 17:05:20,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 17:05:20,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 17:05:20,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 17:05:20,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 17:05:20,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c7cfd70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20, skipping insertion in model container [2021-12-18 17:05:20,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 17:05:20,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 17:05:20,365 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_FNV_test1-1.i[33021,33034] [2021-12-18 17:05:20,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 17:05:20,426 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 17:05:20,443 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_FNV_test1-1.i[33021,33034] [2021-12-18 17:05:20,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 17:05:20,491 INFO L208 MainTranslator]: Completed translation [2021-12-18 17:05:20,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20 WrapperNode [2021-12-18 17:05:20,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 17:05:20,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 17:05:20,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 17:05:20,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 17:05:20,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,563 INFO L137 Inliner]: procedures = 177, calls = 186, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 621 [2021-12-18 17:05:20,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 17:05:20,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 17:05:20,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 17:05:20,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 17:05:20,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 17:05:20,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 17:05:20,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 17:05:20,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 17:05:20,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20" (1/1) ... [2021-12-18 17:05:20,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 17:05:20,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:05:20,662 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 17:05:20,681 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 17:05:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 17:05:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-18 17:05:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-18 17:05:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 17:05:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-18 17:05:20,693 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-18 17:05:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 17:05:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 17:05:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 17:05:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 17:05:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 17:05:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 17:05:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 17:05:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 17:05:20,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 17:05:20,850 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 17:05:20,851 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 17:05:21,276 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 17:05:21,281 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 17:05:21,282 INFO L301 CfgBuilder]: Removed 31 assume(true) statements. [2021-12-18 17:05:21,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 05:05:21 BoogieIcfgContainer [2021-12-18 17:05:21,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 17:05:21,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 17:05:21,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 17:05:21,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 17:05:21,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 05:05:20" (1/3) ... [2021-12-18 17:05:21,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1760142f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 05:05:21, skipping insertion in model container [2021-12-18 17:05:21,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 05:05:20" (2/3) ... [2021-12-18 17:05:21,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1760142f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 05:05:21, skipping insertion in model container [2021-12-18 17:05:21,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 05:05:21" (3/3) ... [2021-12-18 17:05:21,291 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test1-1.i [2021-12-18 17:05:21,295 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 17:05:21,295 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 17:05:21,331 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 17:05:21,335 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 17:05:21,336 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 17:05:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 122 states have internal predecessors, (185), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 17:05:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 17:05:21,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:05:21,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:05:21,352 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:05:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:05:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash -388532060, now seen corresponding path program 1 times [2021-12-18 17:05:21,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:05:21,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765049707] [2021-12-18 17:05:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:05:21,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:05:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:05:21,454 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 17:05:21,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:05:21,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765049707] [2021-12-18 17:05:21,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765049707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:05:21,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:05:21,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 17:05:21,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442509246] [2021-12-18 17:05:21,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:05:21,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 17:05:21,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:05:21,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 17:05:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:05:21,479 INFO L87 Difference]: Start difference. First operand has 128 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 122 states have internal predecessors, (185), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:05:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:05:21,539 INFO L93 Difference]: Finished difference Result 341 states and 579 transitions. [2021-12-18 17:05:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 17:05:21,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 17:05:21,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:05:21,557 INFO L225 Difference]: With dead ends: 341 [2021-12-18 17:05:21,558 INFO L226 Difference]: Without dead ends: 211 [2021-12-18 17:05:21,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:05:21,565 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 107 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 17:05:21,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 345 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:05:21,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-18 17:05:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 125. [2021-12-18 17:05:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 119 states have internal predecessors, (146), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 17:05:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2021-12-18 17:05:21,645 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 10 [2021-12-18 17:05:21,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:05:21,645 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2021-12-18 17:05:21,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:05:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2021-12-18 17:05:21,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 17:05:21,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:05:21,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:05:21,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 17:05:21,651 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:05:21,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:05:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1583744873, now seen corresponding path program 1 times [2021-12-18 17:05:21,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:05:21,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016669464] [2021-12-18 17:05:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:05:21,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:05:21,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:05:21,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458943189] [2021-12-18 17:05:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:05:21,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:05:21,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:05:21,762 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 17:05:21,791 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 17:05:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:05:22,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 17:05:22,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:05:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:05:22,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:05:22,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:05:22,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016669464] [2021-12-18 17:05:22,397 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:05:22,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458943189] [2021-12-18 17:05:22,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458943189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:05:22,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:05:22,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 17:05:22,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304023591] [2021-12-18 17:05:22,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:05:22,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 17:05:22,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:05:22,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 17:05:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 17:05:22,400 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:05:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:05:22,465 INFO L93 Difference]: Finished difference Result 268 states and 372 transitions. [2021-12-18 17:05:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 17:05:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-18 17:05:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:05:22,467 INFO L225 Difference]: With dead ends: 268 [2021-12-18 17:05:22,467 INFO L226 Difference]: Without dead ends: 146 [2021-12-18 17:05:22,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 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 17:05:22,469 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 9 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 287 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 17:05:22,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 287 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:05:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-18 17:05:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-12-18 17:05:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 129 states have (on average 1.2868217054263567) internal successors, (166), 139 states have internal predecessors, (166), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 17:05:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-12-18 17:05:22,477 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 61 [2021-12-18 17:05:22,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:05:22,477 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-12-18 17:05:22,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:05:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-12-18 17:05:22,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 17:05:22,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:05:22,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:05:22,503 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 17:05:22,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:05:22,689 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:05:22,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:05:22,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1230656491, now seen corresponding path program 1 times [2021-12-18 17:05:22,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:05:22,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690871379] [2021-12-18 17:05:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:05:22,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:05:22,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:05:22,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117599121] [2021-12-18 17:05:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:05:22,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:05:22,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:05:22,777 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 17:05:22,779 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 17:05:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:05:23,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 17:05:23,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:05:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:05:23,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:05:23,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:05:23,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690871379] [2021-12-18 17:05:23,324 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:05:23,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117599121] [2021-12-18 17:05:23,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117599121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:05:23,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:05:23,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 17:05:23,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209800537] [2021-12-18 17:05:23,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:05:23,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 17:05:23,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:05:23,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 17:05:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 17:05:23,326 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:05:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:05:23,379 INFO L93 Difference]: Finished difference Result 279 states and 373 transitions. [2021-12-18 17:05:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 17:05:23,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-18 17:05:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:05:23,380 INFO L225 Difference]: With dead ends: 279 [2021-12-18 17:05:23,381 INFO L226 Difference]: Without dead ends: 137 [2021-12-18 17:05:23,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 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 17:05:23,382 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 124 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 317 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 17:05:23,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 317 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:05:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-18 17:05:23,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2021-12-18 17:05:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 115 states have (on average 1.2608695652173914) internal successors, (145), 125 states have internal predecessors, (145), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-18 17:05:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 171 transitions. [2021-12-18 17:05:23,397 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 171 transitions. Word has length 61 [2021-12-18 17:05:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:05:23,398 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 171 transitions. [2021-12-18 17:05:23,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:05:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 171 transitions. [2021-12-18 17:05:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 17:05:23,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:05:23,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:05:23,421 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 17:05:23,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-18 17:05:23,616 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:05:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:05:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash -758509789, now seen corresponding path program 1 times [2021-12-18 17:05:23,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:05:23,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591072221] [2021-12-18 17:05:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:05:23,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:05:23,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:05:23,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768333326] [2021-12-18 17:05:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:05:23,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:05:23,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:05:23,677 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 17:05:23,678 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 17:05:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:05:24,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 17:05:24,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:05:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:05:24,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 17:05:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 17:05:24,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:05:24,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591072221] [2021-12-18 17:05:24,335 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:05:24,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768333326] [2021-12-18 17:05:24,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768333326] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 17:05:24,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 17:05:24,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-18 17:05:24,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125490998] [2021-12-18 17:05:24,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 17:05:24,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 17:05:24,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:05:24,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 17:05:24,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-18 17:05:24,338 INFO L87 Difference]: Start difference. First operand 131 states and 171 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:05:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:05:24,402 INFO L93 Difference]: Finished difference Result 441 states and 563 transitions. [2021-12-18 17:05:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 17:05:24,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-18 17:05:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:05:24,404 INFO L225 Difference]: With dead ends: 441 [2021-12-18 17:05:24,404 INFO L226 Difference]: Without dead ends: 410 [2021-12-18 17:05:24,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-18 17:05:24,405 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 468 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 17:05:24,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 612 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 17:05:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-12-18 17:05:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-12-18 17:05:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 385 states have (on average 1.2103896103896103) internal successors, (466), 395 states have internal predecessors, (466), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-18 17:05:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 510 transitions. [2021-12-18 17:05:24,416 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 510 transitions. Word has length 61 [2021-12-18 17:05:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:05:24,417 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 510 transitions. [2021-12-18 17:05:24,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:05:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 510 transitions. [2021-12-18 17:05:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-18 17:05:24,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:05:24,420 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:05:24,445 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 17:05:24,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:05:24,627 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:05:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:05:24,628 INFO L85 PathProgramCache]: Analyzing trace with hash -188814364, now seen corresponding path program 2 times [2021-12-18 17:05:24,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:05:24,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032586177] [2021-12-18 17:05:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:05:24,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:05:24,785 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:05:24,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415958445] [2021-12-18 17:05:24,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 17:05:24,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:05:24,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:05:24,787 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 17:05:24,797 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 17:05:25,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 17:05:25,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 17:05:25,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 17:05:25,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:05:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-12-18 17:05:26,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:05:26,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:05:26,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032586177] [2021-12-18 17:05:26,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:05:26,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415958445] [2021-12-18 17:05:26,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415958445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:05:26,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:05:26,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 17:05:26,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489702202] [2021-12-18 17:05:26,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:05:26,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 17:05:26,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:05:26,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 17:05:26,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 17:05:26,212 INFO L87 Difference]: Start difference. First operand 410 states and 510 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:05:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:05:26,344 INFO L93 Difference]: Finished difference Result 762 states and 954 transitions. [2021-12-18 17:05:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 17:05:26,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-12-18 17:05:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:05:26,346 INFO L225 Difference]: With dead ends: 762 [2021-12-18 17:05:26,346 INFO L226 Difference]: Without dead ends: 408 [2021-12-18 17:05:26,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 17:05:26,347 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 15 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 17:05:26,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 442 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 17:05:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-18 17:05:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2021-12-18 17:05:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 383 states have (on average 1.2088772845953002) internal successors, (463), 393 states have internal predecessors, (463), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-18 17:05:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 507 transitions. [2021-12-18 17:05:26,355 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 507 transitions. Word has length 214 [2021-12-18 17:05:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:05:26,356 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 507 transitions. [2021-12-18 17:05:26,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 17:05:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 507 transitions. [2021-12-18 17:05:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-18 17:05:26,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:05:26,358 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 17:05:26,379 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 17:05:26,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:05:26,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:05:26,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:05:26,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1697940859, now seen corresponding path program 1 times [2021-12-18 17:05:26,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:05:26,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753663844] [2021-12-18 17:05:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:05:26,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:05:26,748 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:05:26,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423619959] [2021-12-18 17:05:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:05:26,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:05:26,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:05:26,752 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 17:05:26,752 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 17:05:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 17:05:28,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 5059 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 17:05:28,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:05:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 17:05:28,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 17:05:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 17:05:28,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:05:28,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753663844] [2021-12-18 17:05:28,886 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:05:28,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423619959] [2021-12-18 17:05:28,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423619959] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 17:05:28,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 17:05:28,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-18 17:05:28,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533746251] [2021-12-18 17:05:28,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 17:05:28,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 17:05:28,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:05:28,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 17:05:28,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-18 17:05:28,889 INFO L87 Difference]: Start difference. First operand 408 states and 507 transitions. Second operand has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 17:05:29,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:05:29,038 INFO L93 Difference]: Finished difference Result 997 states and 1241 transitions. [2021-12-18 17:05:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 17:05:29,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 229 [2021-12-18 17:05:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:05:29,044 INFO L225 Difference]: With dead ends: 997 [2021-12-18 17:05:29,044 INFO L226 Difference]: Without dead ends: 966 [2021-12-18 17:05:29,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-18 17:05:29,055 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 1477 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 17:05:29,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 1467 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 17:05:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-12-18 17:05:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 966. [2021-12-18 17:05:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 923 states have (on average 1.1971830985915493) internal successors, (1105), 933 states have internal predecessors, (1105), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-18 17:05:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1185 transitions. [2021-12-18 17:05:29,078 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1185 transitions. Word has length 229 [2021-12-18 17:05:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:05:29,079 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1185 transitions. [2021-12-18 17:05:29,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-18 17:05:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1185 transitions. [2021-12-18 17:05:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2021-12-18 17:05:29,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:05:29,087 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 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] [2021-12-18 17:05:29,117 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 17:05:29,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:05:29,303 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:05:29,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:05:29,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1369564891, now seen corresponding path program 2 times [2021-12-18 17:05:29,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:05:29,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209826473] [2021-12-18 17:05:29,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:05:29,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:05:29,772 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:05:29,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140719933] [2021-12-18 17:05:29,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 17:05:29,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:05:29,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:05:29,780 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 17:05:29,781 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 17:10:13,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 17:10:13,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 17:10:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 13849 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 17:10:14,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 17:10:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-12-18 17:10:14,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 17:10:14,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 17:10:14,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209826473] [2021-12-18 17:10:14,695 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-18 17:10:14,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140719933] [2021-12-18 17:10:14,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140719933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 17:10:14,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 17:10:14,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 17:10:14,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119387678] [2021-12-18 17:10:14,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 17:10:14,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 17:10:14,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 17:10:14,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 17:10:14,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 17:10:14,700 INFO L87 Difference]: Start difference. First operand 966 states and 1185 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 17:10:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 17:10:14,734 INFO L93 Difference]: Finished difference Result 1885 states and 2347 transitions. [2021-12-18 17:10:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 17:10:14,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 535 [2021-12-18 17:10:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 17:10:14,739 INFO L225 Difference]: With dead ends: 1885 [2021-12-18 17:10:14,739 INFO L226 Difference]: Without dead ends: 969 [2021-12-18 17:10:14,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 532 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 17:10:14,741 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 2 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 479 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 17:10:14,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 479 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 17:10:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-12-18 17:10:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 969. [2021-12-18 17:10:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 925 states have (on average 1.1978378378378378) internal successors, (1108), 936 states have internal predecessors, (1108), 40 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2021-12-18 17:10:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1198 transitions. [2021-12-18 17:10:14,761 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1198 transitions. Word has length 535 [2021-12-18 17:10:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 17:10:14,761 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1198 transitions. [2021-12-18 17:10:14,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 17:10:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1198 transitions. [2021-12-18 17:10:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-12-18 17:10:14,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 17:10:14,768 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 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] [2021-12-18 17:10:14,983 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forcibly destroying the process [2021-12-18 17:10:15,015 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 17:10:15,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:10:15,016 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 17:10:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 17:10:15,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1859396857, now seen corresponding path program 1 times [2021-12-18 17:10:15,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 17:10:15,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641057568] [2021-12-18 17:10:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:10:15,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 17:10:15,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-18 17:10:15,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596052842] [2021-12-18 17:10:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 17:10:15,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 17:10:15,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 17:10:15,487 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 17:10:15,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Killed by 15