/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:09:04,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:09:04,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:09:04,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 09:09:04,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 09:09:04,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 09:09:04,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 09:09:04,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 09:09:04,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 09:09:04,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 09:09:04,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 09:09:04,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 09:09:04,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:09:04,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:09:04,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:09:04,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:09:04,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:09:04,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:09:04,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:09:04,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:09:04,462 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:09:04,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:09:04,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:09:04,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:09:04,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:09:04,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 09:09:04,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 09:09:04,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 09:09:04,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 09:09:04,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 09:09:04,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 09:09:04,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 09:09:04,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 09:09:04,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 09:09:04,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 09:09:04,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 09:09:04,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 09:09:04,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 09:09:04,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 09:09:04,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:09:04,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:09:04,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:09:04,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 09:09:04,510 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:09:04,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:09:04,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:09:04,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:09:04,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:09:04,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:09:04,514 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:09:04,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:09:04,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:09:04,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:09:04,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:09:04,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:09:04,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:09:04,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:09:04,515 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:09:04,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:09:04,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:09:04,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:09:04,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:09:04,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:09:04,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:09:04,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:09:04,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:09:04,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:09:04,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:09:04,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:09:04,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:09:04,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:09:04,518 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:09:04,519 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:09:04,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:09:04,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:09:04,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:09:04,795 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:09:04,796 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:09:04,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-03-20 09:09:04,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e02ca3cc8/a3effde6407c4b62a88ae48dedafae1b/FLAGc0fc13873 [2022-03-20 09:09:05,290 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:09:05,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-03-20 09:09:05,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e02ca3cc8/a3effde6407c4b62a88ae48dedafae1b/FLAGc0fc13873 [2022-03-20 09:09:05,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e02ca3cc8/a3effde6407c4b62a88ae48dedafae1b [2022-03-20 09:09:05,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:09:05,313 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:09:05,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:09:05,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:09:05,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:09:05,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:09:05" (1/1) ... [2022-03-20 09:09:05,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6405d84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:05, skipping insertion in model container [2022-03-20 09:09:05,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:09:05" (1/1) ... [2022-03-20 09:09:05,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:09:05,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:09:05,486 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c[490,503] [2022-03-20 09:09:05,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:09:05,507 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:09:05,517 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c[490,503] [2022-03-20 09:09:05,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:09:05,535 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:09:05,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:05 WrapperNode [2022-03-20 09:09:05,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:09:05,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:09:05,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:09:05,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:09:05,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:05" (1/1) ... [2022-03-20 09:09:05,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:05" (1/1) ... [2022-03-20 09:09:05,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:05" (1/1) ... [2022-03-20 09:09:05,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:05" (1/1) ... [2022-03-20 09:09:05,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:05" (1/1) ... [2022-03-20 09:09:05,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:05" (1/1) ... [2022-03-20 09:09:05,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:05" (1/1) ... [2022-03-20 09:09:05,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:09:05,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:09:05,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:09:05,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:09:05,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:05" (1/1) ... [2022-03-20 09:09:05,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:09:05,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:05,616 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) [2022-03-20 09:09:05,639 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 [2022-03-20 09:09:05,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:09:05,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:09:05,655 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:09:05,655 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 09:09:05,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:09:05,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:09:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:09:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:09:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:09:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:09:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 09:09:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 09:09:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:09:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:09:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:09:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:09:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:09:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:09:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:09:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:09:05,712 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:09:05,713 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:09:05,895 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:09:05,900 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:09:05,900 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 09:09:05,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:09:05 BoogieIcfgContainer [2022-03-20 09:09:05,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:09:05,902 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:09:05,902 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:09:05,916 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:09:05,919 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:09:05" (1/1) ... [2022-03-20 09:09:05,920 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:09:05,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:09:05 BasicIcfg [2022-03-20 09:09:05,954 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:09:05,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:09:05,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:09:05,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:09:05,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:09:05" (1/4) ... [2022-03-20 09:09:05,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6fd023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:09:05, skipping insertion in model container [2022-03-20 09:09:05,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:05" (2/4) ... [2022-03-20 09:09:05,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6fd023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:09:05, skipping insertion in model container [2022-03-20 09:09:05,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:09:05" (3/4) ... [2022-03-20 09:09:05,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6fd023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:09:05, skipping insertion in model container [2022-03-20 09:09:05,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:09:05" (4/4) ... [2022-03-20 09:09:05,960 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.cqvasr [2022-03-20 09:09:05,964 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:09:05,964 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:09:06,011 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:09:06,034 INFO L340 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=FINITE_AUTOMATA, 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 [2022-03-20 09:09:06,034 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:09:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 09:09:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 09:09:06,063 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:06,064 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:06,064 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:06,069 INFO L85 PathProgramCache]: Analyzing trace with hash -876857705, now seen corresponding path program 1 times [2022-03-20 09:09:06,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:06,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813352685] [2022-03-20 09:09:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:06,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:06,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:09:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:06,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:09:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:06,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 09:09:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:06,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 09:09:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:06,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 09:09:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 09:09:06,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:06,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813352685] [2022-03-20 09:09:06,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813352685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:09:06,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:09:06,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:09:06,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918105883] [2022-03-20 09:09:06,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:09:06,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:09:06,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:06,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:09:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:09:06,402 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:09:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:06,512 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2022-03-20 09:09:06,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:09:06,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 09:09:06,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:06,529 INFO L225 Difference]: With dead ends: 67 [2022-03-20 09:09:06,529 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 09:09:06,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:09:06,545 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:06,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:09:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 09:09:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 09:09:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 09:09:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 09:09:06,591 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 32 [2022-03-20 09:09:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:06,592 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 09:09:06,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:09:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 09:09:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 09:09:06,595 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:06,595 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:06,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:09:06,596 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:06,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1858806609, now seen corresponding path program 1 times [2022-03-20 09:09:06,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:06,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961782529] [2022-03-20 09:09:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:06,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:06,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:06,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574799945] [2022-03-20 09:09:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:06,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:06,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:06,634 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) [2022-03-20 09:09:06,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 09:09:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:06,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 09:09:06,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 09:09:06,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 09:09:06,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:06,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961782529] [2022-03-20 09:09:06,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:06,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574799945] [2022-03-20 09:09:06,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574799945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:06,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:09:06,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 09:09:06,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486440638] [2022-03-20 09:09:06,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:06,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 09:09:06,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:06,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 09:09:06,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 09:09:06,920 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:09:07,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:07,034 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-03-20 09:09:07,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:09:07,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 09:09:07,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:07,036 INFO L225 Difference]: With dead ends: 49 [2022-03-20 09:09:07,036 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 09:09:07,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:09:07,037 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:07,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 173 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:09:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 09:09:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-20 09:09:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 09:09:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-20 09:09:07,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 33 [2022-03-20 09:09:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:07,063 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-20 09:09:07,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:09:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-20 09:09:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 09:09:07,064 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:07,064 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:07,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:07,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:07,265 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1753102734, now seen corresponding path program 1 times [2022-03-20 09:09:07,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:07,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492337057] [2022-03-20 09:09:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:07,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:07,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:07,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67883017] [2022-03-20 09:09:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:07,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:07,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:07,286 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) [2022-03-20 09:09:07,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 09:09:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:07,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 09:09:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 09:09:07,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 09:09:07,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:07,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492337057] [2022-03-20 09:09:07,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:07,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67883017] [2022-03-20 09:09:07,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67883017] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:07,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:09:07,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 09:09:07,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647958255] [2022-03-20 09:09:07,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:09:07,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:09:07,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:07,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:09:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:09:07,580 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 09:09:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:07,633 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-03-20 09:09:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:09:07,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 09:09:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:07,635 INFO L225 Difference]: With dead ends: 40 [2022-03-20 09:09:07,635 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 09:09:07,636 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:09:07,637 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:07,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 126 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:09:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 09:09:07,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 09:09:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 09:09:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-03-20 09:09:07,645 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 34 [2022-03-20 09:09:07,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:07,645 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-03-20 09:09:07,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 09:09:07,646 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-03-20 09:09:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 09:09:07,647 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:07,647 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:07,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:07,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 09:09:07,864 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:07,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:07,864 INFO L85 PathProgramCache]: Analyzing trace with hash -742626026, now seen corresponding path program 1 times [2022-03-20 09:09:07,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:07,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78418706] [2022-03-20 09:09:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:07,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:07,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:07,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729480232] [2022-03-20 09:09:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:07,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:07,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:07,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:09:07,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 09:09:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:07,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 09:09:07,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 09:09:08,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:09:08,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78418706] [2022-03-20 09:09:08,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729480232] [2022-03-20 09:09:08,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729480232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:09:08,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:09:08,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:09:08,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128685236] [2022-03-20 09:09:08,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:09:08,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:09:08,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:09:08,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:09:08,080 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 09:09:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:08,113 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-03-20 09:09:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:09:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-03-20 09:09:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:08,115 INFO L225 Difference]: With dead ends: 51 [2022-03-20 09:09:08,115 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 09:09:08,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:09:08,116 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:08,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 153 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:09:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 09:09:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-03-20 09:09:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 09:09:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-03-20 09:09:08,126 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 39 [2022-03-20 09:09:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:08,126 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-03-20 09:09:08,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 09:09:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-03-20 09:09:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 09:09:08,128 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:08,128 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:08,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:08,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:08,339 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:08,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2010982190, now seen corresponding path program 1 times [2022-03-20 09:09:08,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:08,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546136823] [2022-03-20 09:09:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:08,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:08,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:08,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394570004] [2022-03-20 09:09:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:08,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:08,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:08,354 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) [2022-03-20 09:09:08,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 09:09:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:08,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 09:09:08,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 09:09:08,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:08,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:08,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546136823] [2022-03-20 09:09:08,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:08,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394570004] [2022-03-20 09:09:08,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394570004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:08,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:09:08,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 09:09:08,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492616568] [2022-03-20 09:09:08,703 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:08,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 09:09:08,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:08,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 09:09:08,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:09:08,706 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 09:09:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:08,796 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-03-20 09:09:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 09:09:08,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-20 09:09:08,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:08,798 INFO L225 Difference]: With dead ends: 55 [2022-03-20 09:09:08,798 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 09:09:08,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:09:08,799 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:08,799 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 176 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:09:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 09:09:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-20 09:09:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 09:09:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-20 09:09:08,809 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 44 [2022-03-20 09:09:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:08,810 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-20 09:09:08,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 09:09:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-20 09:09:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 09:09:08,811 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:08,811 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:08,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:09,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:09,016 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:09,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:09,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2061823606, now seen corresponding path program 1 times [2022-03-20 09:09:09,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:09,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495983570] [2022-03-20 09:09:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:09,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:09,027 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:09,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322635056] [2022-03-20 09:09:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:09,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:09,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:09,029 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) [2022-03-20 09:09:09,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 09:09:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:09,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 09:09:09,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 09:09:09,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:09,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:09,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495983570] [2022-03-20 09:09:09,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:09,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322635056] [2022-03-20 09:09:09,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322635056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:09,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:09:09,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 09:09:09,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641404567] [2022-03-20 09:09:09,423 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:09,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 09:09:09,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:09,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 09:09:09,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:09:09,425 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 09:09:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:09,520 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-03-20 09:09:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 09:09:09,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-03-20 09:09:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:09,521 INFO L225 Difference]: With dead ends: 59 [2022-03-20 09:09:09,521 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 09:09:09,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:09:09,522 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:09,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:09:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 09:09:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-03-20 09:09:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 09:09:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-03-20 09:09:09,531 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 49 [2022-03-20 09:09:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:09,531 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-03-20 09:09:09,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 09:09:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-03-20 09:09:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 09:09:09,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:09,533 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:09,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:09,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:09,748 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1928289951, now seen corresponding path program 1 times [2022-03-20 09:09:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:09,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928889923] [2022-03-20 09:09:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:09,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:09,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446077901] [2022-03-20 09:09:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:09,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:09,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:09,763 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) [2022-03-20 09:09:09,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 09:09:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 09:09:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 09:09:09,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 09:09:10,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:10,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928889923] [2022-03-20 09:09:10,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:10,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446077901] [2022-03-20 09:09:10,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446077901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:10,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:09:10,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 09:09:10,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200568666] [2022-03-20 09:09:10,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:10,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 09:09:10,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 09:09:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:09:10,089 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 09:09:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:10,232 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2022-03-20 09:09:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 09:09:10,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2022-03-20 09:09:10,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:10,237 INFO L225 Difference]: With dead ends: 103 [2022-03-20 09:09:10,237 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 09:09:10,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 09:09:10,241 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:10,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 367 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:09:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 09:09:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2022-03-20 09:09:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 09:09:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 117 transitions. [2022-03-20 09:09:10,262 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 117 transitions. Word has length 58 [2022-03-20 09:09:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:10,263 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 117 transitions. [2022-03-20 09:09:10,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 09:09:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 117 transitions. [2022-03-20 09:09:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 09:09:10,264 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:10,264 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:10,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:10,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:10,480 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:10,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:10,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1649820922, now seen corresponding path program 1 times [2022-03-20 09:09:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:10,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860747724] [2022-03-20 09:09:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:10,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:10,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:10,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745844928] [2022-03-20 09:09:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:10,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:10,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:10,491 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) [2022-03-20 09:09:10,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 09:09:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:10,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 09:09:10,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 09:09:10,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 09:09:10,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:10,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860747724] [2022-03-20 09:09:10,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:10,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745844928] [2022-03-20 09:09:10,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745844928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:10,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:09:10,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 09:09:10,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269580745] [2022-03-20 09:09:10,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:10,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 09:09:10,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 09:09:10,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:09:10,955 INFO L87 Difference]: Start difference. First operand 86 states and 117 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 09:09:11,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:11,223 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2022-03-20 09:09:11,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 09:09:11,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 64 [2022-03-20 09:09:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:11,226 INFO L225 Difference]: With dead ends: 129 [2022-03-20 09:09:11,226 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 09:09:11,226 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-20 09:09:11,227 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 38 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:11,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 241 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:09:11,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 09:09:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2022-03-20 09:09:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 09:09:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2022-03-20 09:09:11,245 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 64 [2022-03-20 09:09:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:11,245 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2022-03-20 09:09:11,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 09:09:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2022-03-20 09:09:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 09:09:11,246 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:11,246 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:11,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:11,457 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:11,458 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:11,458 INFO L85 PathProgramCache]: Analyzing trace with hash -385302302, now seen corresponding path program 2 times [2022-03-20 09:09:11,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:11,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989035692] [2022-03-20 09:09:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:11,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:11,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:11,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831676868] [2022-03-20 09:09:11,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:09:11,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:11,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:11,469 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) [2022-03-20 09:09:11,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 09:09:11,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:09:11,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:09:11,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 09:09:11,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-03-20 09:09:12,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 09:09:12,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:12,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989035692] [2022-03-20 09:09:12,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:12,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831676868] [2022-03-20 09:09:12,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831676868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:12,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:09:12,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-03-20 09:09:12,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805885745] [2022-03-20 09:09:12,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:12,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 09:09:12,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:12,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 09:09:12,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-20 09:09:12,285 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 09:09:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:15,252 INFO L93 Difference]: Finished difference Result 229 states and 335 transitions. [2022-03-20 09:09:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 09:09:15,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 69 [2022-03-20 09:09:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:15,255 INFO L225 Difference]: With dead ends: 229 [2022-03-20 09:09:15,255 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 09:09:15,256 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2022-03-20 09:09:15,256 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 91 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:15,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 433 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 09:09:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 09:09:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2022-03-20 09:09:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 100 states have internal predecessors, (118), 69 states have call successors, (69), 12 states have call predecessors, (69), 11 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-20 09:09:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 254 transitions. [2022-03-20 09:09:15,292 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 254 transitions. Word has length 69 [2022-03-20 09:09:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:15,293 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 254 transitions. [2022-03-20 09:09:15,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 09:09:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 254 transitions. [2022-03-20 09:09:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 09:09:15,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:15,294 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:15,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:15,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 09:09:15,504 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash -524447642, now seen corresponding path program 3 times [2022-03-20 09:09:15,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:15,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292171104] [2022-03-20 09:09:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:15,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:15,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:15,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042877953] [2022-03-20 09:09:15,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:09:15,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:15,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:15,519 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) [2022-03-20 09:09:15,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 09:09:15,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 09:09:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:09:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 09:09:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-20 09:09:16,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:16,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:16,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292171104] [2022-03-20 09:09:16,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:16,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042877953] [2022-03-20 09:09:16,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042877953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:09:16,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:09:16,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 09:09:16,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057061606] [2022-03-20 09:09:16,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:16,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 09:09:16,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:16,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 09:09:16,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:09:16,155 INFO L87 Difference]: Start difference. First operand 178 states and 254 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 09:09:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:16,427 INFO L93 Difference]: Finished difference Result 210 states and 293 transitions. [2022-03-20 09:09:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 09:09:16,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-03-20 09:09:16,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:16,431 INFO L225 Difference]: With dead ends: 210 [2022-03-20 09:09:16,431 INFO L226 Difference]: Without dead ends: 208 [2022-03-20 09:09:16,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-20 09:09:16,433 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:16,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 252 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:09:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-20 09:09:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2022-03-20 09:09:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 116 states have internal predecessors, (136), 77 states have call successors, (77), 15 states have call predecessors, (77), 14 states have return successors, (75), 73 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-20 09:09:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 288 transitions. [2022-03-20 09:09:16,478 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 288 transitions. Word has length 74 [2022-03-20 09:09:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:16,479 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 288 transitions. [2022-03-20 09:09:16,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 09:09:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 288 transitions. [2022-03-20 09:09:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 09:09:16,483 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:16,483 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:09:16,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 09:09:16,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 09:09:16,703 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1568721063, now seen corresponding path program 1 times [2022-03-20 09:09:16,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:16,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428199888] [2022-03-20 09:09:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:16,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:16,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:16,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605456801] [2022-03-20 09:09:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:16,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:16,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:16,724 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) [2022-03-20 09:09:16,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 09:09:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:16,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 09:09:16,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-20 09:09:17,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-20 09:09:17,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:17,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428199888] [2022-03-20 09:09:17,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:17,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605456801] [2022-03-20 09:09:17,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605456801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:17,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:09:17,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-20 09:09:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905433629] [2022-03-20 09:09:17,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:17,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 09:09:17,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 09:09:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-20 09:09:17,957 INFO L87 Difference]: Start difference. First operand 205 states and 288 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 09:09:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:09:20,468 INFO L93 Difference]: Finished difference Result 307 states and 440 transitions. [2022-03-20 09:09:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 09:09:20,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 80 [2022-03-20 09:09:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:09:20,474 INFO L225 Difference]: With dead ends: 307 [2022-03-20 09:09:20,475 INFO L226 Difference]: Without dead ends: 298 [2022-03-20 09:09:20,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 09:09:20,476 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 09:09:20,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 442 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 09:09:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-20 09:09:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2022-03-20 09:09:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 164 states have (on average 1.2073170731707317) internal successors, (198), 167 states have internal predecessors, (198), 113 states have call successors, (113), 18 states have call predecessors, (113), 17 states have return successors, (111), 109 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-20 09:09:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 422 transitions. [2022-03-20 09:09:20,540 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 422 transitions. Word has length 80 [2022-03-20 09:09:20,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:09:20,540 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 422 transitions. [2022-03-20 09:09:20,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-20 09:09:20,540 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 422 transitions. [2022-03-20 09:09:20,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 09:09:20,541 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:09:20,542 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-03-20 09:09:20,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-20 09:09:20,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 09:09:20,752 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:09:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:09:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 17347872, now seen corresponding path program 1 times [2022-03-20 09:09:20,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:09:20,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266013654] [2022-03-20 09:09:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:20,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:09:20,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:09:20,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168101578] [2022-03-20 09:09:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:09:20,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:09:20,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:09:20,768 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) [2022-03-20 09:09:20,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 09:09:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:09:20,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 09:09:20,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:09:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 55 proven. 57 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 09:09:21,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:09:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 55 proven. 57 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 09:09:29,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:09:29,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266013654] [2022-03-20 09:09:29,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:09:29,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168101578] [2022-03-20 09:09:29,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168101578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:09:29,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:09:29,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2022-03-20 09:09:29,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046372664] [2022-03-20 09:09:29,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:09:29,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 09:09:29,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:09:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 09:09:29,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-03-20 09:09:29,457 INFO L87 Difference]: Start difference. First operand 295 states and 422 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 13 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2022-03-20 09:09:35,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:09:38,609 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:09:48,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:09:50,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:09:53,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:09:55,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:09:57,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:09:59,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:10:01,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:10:03,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:10:06,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:10:09,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:10:11,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:10:14,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:10:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:19,811 INFO L93 Difference]: Finished difference Result 343 states and 495 transitions. [2022-03-20 09:10:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 09:10:19,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 13 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) Word has length 96 [2022-03-20 09:10:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:19,814 INFO L225 Difference]: With dead ends: 343 [2022-03-20 09:10:19,814 INFO L226 Difference]: Without dead ends: 341 [2022-03-20 09:10:19,815 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=227, Invalid=699, Unknown=4, NotChecked=0, Total=930 [2022-03-20 09:10:19,816 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 74 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 127 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:19,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 314 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 423 Invalid, 13 Unknown, 0 Unchecked, 34.2s Time] [2022-03-20 09:10:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-03-20 09:10:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 336. [2022-03-20 09:10:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 183 states have (on average 1.2131147540983607) internal successors, (222), 189 states have internal predecessors, (222), 134 states have call successors, (134), 19 states have call predecessors, (134), 18 states have return successors, (132), 127 states have call predecessors, (132), 132 states have call successors, (132) [2022-03-20 09:10:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 488 transitions. [2022-03-20 09:10:19,898 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 488 transitions. Word has length 96 [2022-03-20 09:10:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:19,898 INFO L478 AbstractCegarLoop]: Abstraction has 336 states and 488 transitions. [2022-03-20 09:10:19,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 13 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2022-03-20 09:10:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 488 transitions. [2022-03-20 09:10:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 09:10:19,899 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:19,900 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:19,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 09:10:20,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 09:10:20,124 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:20,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:20,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1494614922, now seen corresponding path program 4 times [2022-03-20 09:10:20,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:20,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279482729] [2022-03-20 09:10:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:20,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:20,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:10:20,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497626099] [2022-03-20 09:10:20,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:10:20,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:20,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:20,138 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) [2022-03-20 09:10:20,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 09:10:20,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:10:20,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:10:20,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 09:10:20,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-20 09:10:20,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:10:20,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:10:20,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279482729] [2022-03-20 09:10:20,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:10:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497626099] [2022-03-20 09:10:20,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497626099] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:10:20,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:10:20,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:10:20,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920356508] [2022-03-20 09:10:20,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:10:20,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:10:20,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:20,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:10:20,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:10:20,347 INFO L87 Difference]: Start difference. First operand 336 states and 488 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-20 09:10:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:20,441 INFO L93 Difference]: Finished difference Result 410 states and 590 transitions. [2022-03-20 09:10:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:10:20,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2022-03-20 09:10:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:20,443 INFO L225 Difference]: With dead ends: 410 [2022-03-20 09:10:20,443 INFO L226 Difference]: Without dead ends: 239 [2022-03-20 09:10:20,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 09:10:20,447 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:20,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:10:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-20 09:10:20,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 215. [2022-03-20 09:10:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 119 states have internal predecessors, (133), 79 states have call successors, (79), 19 states have call predecessors, (79), 18 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 09:10:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 289 transitions. [2022-03-20 09:10:20,526 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 289 transitions. Word has length 99 [2022-03-20 09:10:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:20,526 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 289 transitions. [2022-03-20 09:10:20,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-20 09:10:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 289 transitions. [2022-03-20 09:10:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 09:10:20,528 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:20,529 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:20,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 09:10:20,752 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 09:10:20,752 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash -527743528, now seen corresponding path program 2 times [2022-03-20 09:10:20,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:20,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917811368] [2022-03-20 09:10:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:20,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:10:20,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408730990] [2022-03-20 09:10:20,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:10:20,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:20,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:20,763 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:10:20,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 09:10:20,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:10:20,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:10:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 09:10:20,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-20 09:10:21,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:10:22,012 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:10:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 120 proven. 32 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-20 09:10:22,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:10:22,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917811368] [2022-03-20 09:10:22,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:10:22,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408730990] [2022-03-20 09:10:22,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408730990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:10:22,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:10:22,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-03-20 09:10:22,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569741311] [2022-03-20 09:10:22,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:10:22,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 09:10:22,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:22,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 09:10:22,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-20 09:10:22,287 INFO L87 Difference]: Start difference. First operand 215 states and 289 transitions. Second operand has 21 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 14 states have call successors, (31) [2022-03-20 09:10:23,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:23,987 INFO L93 Difference]: Finished difference Result 246 states and 326 transitions. [2022-03-20 09:10:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 09:10:23,988 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 14 states have call successors, (31) Word has length 116 [2022-03-20 09:10:23,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:23,989 INFO L225 Difference]: With dead ends: 246 [2022-03-20 09:10:23,989 INFO L226 Difference]: Without dead ends: 244 [2022-03-20 09:10:23,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-03-20 09:10:23,990 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 42 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:23,991 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 568 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 09:10:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-20 09:10:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2022-03-20 09:10:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 126 states have (on average 1.126984126984127) internal successors, (142), 128 states have internal predecessors, (142), 79 states have call successors, (79), 22 states have call predecessors, (79), 21 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 09:10:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 298 transitions. [2022-03-20 09:10:24,054 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 298 transitions. Word has length 116 [2022-03-20 09:10:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:24,055 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 298 transitions. [2022-03-20 09:10:24,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 14 states have call successors, (31) [2022-03-20 09:10:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 298 transitions. [2022-03-20 09:10:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 09:10:24,056 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:24,056 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:24,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 09:10:24,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 09:10:24,271 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1136073891, now seen corresponding path program 2 times [2022-03-20 09:10:24,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:24,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407173751] [2022-03-20 09:10:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:24,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:24,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:10:24,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522975096] [2022-03-20 09:10:24,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:10:24,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:24,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:24,280 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:10:24,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 09:10:24,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:10:24,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:10:24,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 09:10:24,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:25,517 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:10:25,521 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:10:25,553 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:10:25,557 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:10:25,560 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:10:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 133 proven. 86 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 09:10:25,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:10:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2022-03-20 09:10:28,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:10:28,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407173751] [2022-03-20 09:10:28,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:10:28,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522975096] [2022-03-20 09:10:28,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522975096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:10:28,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:10:28,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-20 09:10:28,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3658650] [2022-03-20 09:10:28,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:10:28,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 09:10:28,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:28,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 09:10:28,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-20 09:10:28,143 INFO L87 Difference]: Start difference. First operand 227 states and 298 transitions. Second operand has 26 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-20 09:10:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:37,115 INFO L93 Difference]: Finished difference Result 278 states and 365 transitions. [2022-03-20 09:10:37,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 09:10:37,115 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 127 [2022-03-20 09:10:37,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:37,117 INFO L225 Difference]: With dead ends: 278 [2022-03-20 09:10:37,117 INFO L226 Difference]: Without dead ends: 270 [2022-03-20 09:10:37,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 09:10:37,118 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:37,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 579 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-20 09:10:37,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-20 09:10:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 235. [2022-03-20 09:10:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 132 states have (on average 1.0909090909090908) internal successors, (144), 133 states have internal predecessors, (144), 78 states have call successors, (78), 25 states have call predecessors, (78), 24 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 09:10:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2022-03-20 09:10:37,188 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 127 [2022-03-20 09:10:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:37,189 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2022-03-20 09:10:37,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-03-20 09:10:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2022-03-20 09:10:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-20 09:10:37,191 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:37,191 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:37,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 09:10:37,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:37,415 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1033581786, now seen corresponding path program 3 times [2022-03-20 09:10:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:37,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297270934] [2022-03-20 09:10:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:37,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:10:37,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840014730] [2022-03-20 09:10:37,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:10:37,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:37,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:37,426 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:10:37,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 09:10:38,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 09:10:38,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:10:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 09:10:38,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 168 proven. 35 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2022-03-20 09:10:44,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:10:45,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:10:45,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297270934] [2022-03-20 09:10:45,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:10:45,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840014730] [2022-03-20 09:10:45,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840014730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:10:45,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:10:45,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 09:10:45,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130946235] [2022-03-20 09:10:45,862 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:10:45,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 09:10:45,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:10:45,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 09:10:45,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-20 09:10:45,863 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 09:10:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:10:53,253 INFO L93 Difference]: Finished difference Result 331 states and 450 transitions. [2022-03-20 09:10:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 09:10:53,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 168 [2022-03-20 09:10:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:10:53,256 INFO L225 Difference]: With dead ends: 331 [2022-03-20 09:10:53,256 INFO L226 Difference]: Without dead ends: 329 [2022-03-20 09:10:53,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 09:10:53,257 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 39 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 09:10:53,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 327 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 574 Invalid, 0 Unknown, 76 Unchecked, 2.4s Time] [2022-03-20 09:10:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-20 09:10:53,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 323. [2022-03-20 09:10:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 172 states have internal predecessors, (191), 126 states have call successors, (126), 27 states have call predecessors, (126), 26 states have return successors, (125), 123 states have call predecessors, (125), 125 states have call successors, (125) [2022-03-20 09:10:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 442 transitions. [2022-03-20 09:10:53,365 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 442 transitions. Word has length 168 [2022-03-20 09:10:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:10:53,366 INFO L478 AbstractCegarLoop]: Abstraction has 323 states and 442 transitions. [2022-03-20 09:10:53,366 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 09:10:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 442 transitions. [2022-03-20 09:10:53,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-03-20 09:10:53,368 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:10:53,369 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:10:53,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 09:10:53,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 09:10:53,576 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:10:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:10:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash -44343328, now seen corresponding path program 4 times [2022-03-20 09:10:53,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:10:53,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64227951] [2022-03-20 09:10:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:10:53,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:10:53,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:10:53,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160668797] [2022-03-20 09:10:53,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:10:53,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:10:53,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:10:53,598 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:10:53,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 09:10:54,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:10:54,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:10:54,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 09:10:54,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:10:56,531 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:11:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 303 proven. 264 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2022-03-20 09:11:19,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:11:28,478 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:11:28,486 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:12:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 356 proven. 91 refuted. 0 times theorem prover too weak. 1170 trivial. 0 not checked. [2022-03-20 09:12:39,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:12:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64227951] [2022-03-20 09:12:39,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:12:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160668797] [2022-03-20 09:12:39,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160668797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:12:39,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:12:39,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-20 09:12:39,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941500444] [2022-03-20 09:12:39,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:12:39,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 09:12:39,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:12:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 09:12:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=855, Unknown=6, NotChecked=0, Total=1122 [2022-03-20 09:12:39,683 INFO L87 Difference]: Start difference. First operand 323 states and 442 transitions. Second operand has 34 states, 32 states have (on average 1.96875) internal successors, (63), 28 states have internal predecessors, (63), 17 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (54), 18 states have call predecessors, (54), 16 states have call successors, (54) [2022-03-20 09:12:42,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:12:52,480 WARN L232 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:13:22,829 WARN L232 SmtUtils]: Spent 30.16s on a formula simplification. DAG size of input: 87 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:13:28,994 WARN L232 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:14:02,145 WARN L232 SmtUtils]: Spent 32.61s on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:14:36,708 WARN L232 SmtUtils]: Spent 26.43s on a formula simplification. DAG size of input: 110 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:14:37,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:14:53,732 WARN L232 SmtUtils]: Spent 15.16s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:15:06,024 WARN L232 SmtUtils]: Spent 9.77s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:15:24,951 WARN L232 SmtUtils]: Spent 18.29s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:15:27,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:15:28,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:15:30,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:15:32,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:15:35,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:15:37,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:15:46,233 WARN L232 SmtUtils]: Spent 7.94s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:16:34,734 WARN L232 SmtUtils]: Spent 46.27s on a formula simplification. DAG size of input: 130 DAG size of output: 129 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:16:37,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:16:42,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:16:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:43,216 INFO L93 Difference]: Finished difference Result 529 states and 746 transitions. [2022-03-20 09:16:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 09:16:43,216 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.96875) internal successors, (63), 28 states have internal predecessors, (63), 17 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (54), 18 states have call predecessors, (54), 16 states have call successors, (54) Word has length 190 [2022-03-20 09:16:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:43,219 INFO L225 Difference]: With dead ends: 529 [2022-03-20 09:16:43,219 INFO L226 Difference]: Without dead ends: 527 [2022-03-20 09:16:43,220 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 347 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 256.5s TimeCoverageRelationStatistics Valid=883, Invalid=2532, Unknown=7, NotChecked=0, Total=3422 [2022-03-20 09:16:43,221 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 223 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 465 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:43,221 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 540 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 1094 Invalid, 7 Unknown, 16 Unchecked, 26.2s Time] [2022-03-20 09:16:43,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-20 09:16:43,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 473. [2022-03-20 09:16:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 243 states have (on average 1.1358024691358024) internal successors, (276), 248 states have internal predecessors, (276), 194 states have call successors, (194), 36 states have call predecessors, (194), 35 states have return successors, (193), 188 states have call predecessors, (193), 193 states have call successors, (193) [2022-03-20 09:16:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 663 transitions. [2022-03-20 09:16:43,426 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 663 transitions. Word has length 190 [2022-03-20 09:16:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:43,427 INFO L478 AbstractCegarLoop]: Abstraction has 473 states and 663 transitions. [2022-03-20 09:16:43,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.96875) internal successors, (63), 28 states have internal predecessors, (63), 17 states have call successors, (56), 2 states have call predecessors, (56), 2 states have return successors, (54), 18 states have call predecessors, (54), 16 states have call successors, (54) [2022-03-20 09:16:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 663 transitions. [2022-03-20 09:16:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-03-20 09:16:43,431 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:43,431 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 8, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:43,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 09:16:43,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 09:16:43,639 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:43,639 INFO L85 PathProgramCache]: Analyzing trace with hash -690284640, now seen corresponding path program 5 times [2022-03-20 09:16:43,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:43,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013023110] [2022-03-20 09:16:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:43,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:43,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:43,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566509297] [2022-03-20 09:16:43,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 09:16:43,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:43,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:43,660 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:16:43,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 09:16:44,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-20 09:16:44,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:16:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 114 conjunts are in the unsatisfiable core [2022-03-20 09:16:44,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2697 backedges. 299 proven. 444 refuted. 0 times theorem prover too weak. 1954 trivial. 0 not checked. [2022-03-20 09:16:47,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:17:01,292 WARN L232 SmtUtils]: Spent 7.35s on a formula simplification that was a NOOP. DAG size: 20 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-20 09:18:05,928 WARN L232 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:18:38,932 WARN L232 SmtUtils]: Spent 12.22s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 09:19:21,046 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse18 (+ c_main_~k~0 1))) (let ((.cse16 (* (- 1) c_main_~q~0 .cse18)) (.cse17 (* c_main_~s~0 .cse18))) (let ((.cse10 (+ (* (- 3) c_main_~r~0) (* .cse17 3) c_main_~s~0)) (.cse9 (+ (* c_main_~p~0 (- 3)) c_main_~q~0 (* .cse16 (- 3)))) (.cse13 (+ (* (- 1) .cse17) c_main_~r~0)) (.cse12 (+ .cse16 c_main_~p~0))) (let ((.cse11 (* .cse12 c_main_~x~0)) (.cse14 (* .cse13 c_main_~y~0)) (.cse6 (* .cse9 c_main_~x~0)) (.cse7 (* .cse10 c_main_~y~0))) (let ((.cse0 (* c_main_~p~0 c_main_~x~0)) (.cse1 (* c_main_~r~0 c_main_~y~0)) (.cse4 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse5 (* c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse2 (* c_main_~q~0 c_main_~x~0)) (.cse3 (* c_main_~s~0 c_main_~y~0)) (.cse8 (+ .cse6 .cse7)) (.cse15 (+ .cse11 .cse14))) (or (<= (+ (* .cse0 4) (* .cse1 4)) (+ (* 5 .cse2) (* 5 .cse3) (* .cse4 4) (* .cse5 4))) (not (<= (+ (* 3 .cse0) (* 3 .cse1)) (+ (* .cse3 4) (* .cse4 3) (* .cse2 4) (* 3 .cse5)))) (= (+ .cse6 .cse7 (* .cse8 c_main_~y~0)) (+ (* c_main_~xy~0 .cse9) .cse6 .cse7 (* c_main_~yy~0 .cse10))) (not (= (+ .cse11 (* .cse12 c_main_~xy~0) (* c_main_~yy~0 .cse13) .cse14) (+ (* .cse15 c_main_~y~0) .cse11 .cse14))) (not (= c_main_~b~0 (+ .cse2 .cse3))) (= .cse8 0) (not (= .cse15 (+ (* (- 1) c_main_~b~0) c_main_~c~0))))))))) is different from true [2022-03-20 09:20:57,992 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse18 (+ 2 c_main_~k~0))) (let ((.cse16 (* c_main_~s~0 .cse18)) (.cse17 (* (- 1) c_main_~q~0 .cse18))) (let ((.cse0 (+ c_main_~p~0 .cse17)) (.cse2 (+ (* (- 1) .cse16) c_main_~r~0)) (.cse14 (+ (* c_main_~p~0 (- 3)) c_main_~q~0 (* (- 3) .cse17))) (.cse15 (+ (* (- 3) c_main_~r~0) (* .cse16 3) c_main_~s~0))) (let ((.cse12 (* .cse15 c_main_~y~0)) (.cse13 (* .cse14 c_main_~x~0)) (.cse1 (* .cse2 c_main_~y~0)) (.cse3 (* .cse0 c_main_~x~0))) (let ((.cse4 (+ .cse1 .cse3)) (.cse5 (* c_main_~p~0 c_main_~x~0)) (.cse6 (* c_main_~r~0 c_main_~y~0)) (.cse9 (* c_main_~s~0 c_main_~y~0)) (.cse7 (* c_main_~q~0 c_main_~x~0)) (.cse8 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse10 (* c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse11 (+ .cse12 .cse13))) (or (not (= (+ (* .cse0 c_main_~xy~0) .cse1 (* c_main_~yy~0 .cse2) .cse3) (+ (* .cse4 c_main_~y~0) .cse1 .cse3))) (not (= (+ c_main_~c~0 (* (- 2) c_main_~b~0)) .cse4)) (<= (+ (* .cse5 4) (* .cse6 4)) (+ (* .cse7 9) (* .cse8 4) (* 9 .cse9) (* .cse10 4))) (not (= c_main_~b~0 (+ .cse7 .cse9))) (= .cse11 0) (not (<= (+ (* 3 .cse5) (* 3 .cse6)) (+ (* 7 .cse9) (* 7 .cse7) (* .cse8 3) (* 3 .cse10)))) (= (+ (* .cse11 c_main_~y~0) .cse12 .cse13) (+ (* c_main_~xy~0 .cse14) (* c_main_~yy~0 .cse15) .cse12 .cse13)))))))) is different from true [2022-03-20 09:23:31,380 WARN L232 SmtUtils]: Spent 13.90s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)