/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 05:35:12,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 05:35:12,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 05:35:12,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 05:35:12,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 05:35:12,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 05:35:12,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 05:35:12,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 05:35:12,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 05:35:12,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 05:35:12,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 05:35:12,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 05:35:12,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 05:35:12,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 05:35:12,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 05:35:12,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 05:35:12,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 05:35:12,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 05:35:12,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 05:35:12,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 05:35:12,700 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 05:35:12,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 05:35:12,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 05:35:12,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 05:35:12,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 05:35:12,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 05:35:12,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 05:35:12,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 05:35:12,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 05:35:12,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 05:35:12,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 05:35:12,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 05:35:12,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 05:35:12,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 05:35:12,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 05:35:12,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 05:35:12,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 05:35:12,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 05:35:12,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 05:35:12,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 05:35:12,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 05:35:12,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 05:35:12,718 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 05:35:12,728 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 05:35:12,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 05:35:12,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 05:35:12,730 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 05:35:12,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 05:35:12,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 05:35:12,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 05:35:12,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 05:35:12,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 05:35:12,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 05:35:12,732 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 05:35:12,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 05:35:12,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 05:35:12,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 05:35:12,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 05:35:12,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 05:35:12,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 05:35:12,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 05:35:12,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:35:12,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 05:35:12,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 05:35:12,733 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 05:35:12,734 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 05:35:12,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 05:35:12,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 05:35:12,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 05:35:12,966 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 05:35:12,967 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 05:35:12,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2022-03-20 05:35:13,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edbb54b05/287ecc9e159e425c96d80c69fd3b0099/FLAG300f2119f [2022-03-20 05:35:13,398 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 05:35:13,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2022-03-20 05:35:13,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edbb54b05/287ecc9e159e425c96d80c69fd3b0099/FLAG300f2119f [2022-03-20 05:35:13,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edbb54b05/287ecc9e159e425c96d80c69fd3b0099 [2022-03-20 05:35:13,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 05:35:13,431 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 05:35:13,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 05:35:13,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 05:35:13,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 05:35:13,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:35:13" (1/1) ... [2022-03-20 05:35:13,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4291c13b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:35:13, skipping insertion in model container [2022-03-20 05:35:13,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:35:13" (1/1) ... [2022-03-20 05:35:13,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 05:35:13,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 05:35:13,599 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-scaling/egcd2-ll_unwindbound50.c[490,503] [2022-03-20 05:35:13,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:35:13,625 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 05:35:13,633 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-scaling/egcd2-ll_unwindbound50.c[490,503] [2022-03-20 05:35:13,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:35:13,647 INFO L208 MainTranslator]: Completed translation [2022-03-20 05:35:13,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:35:13 WrapperNode [2022-03-20 05:35:13,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 05:35:13,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 05:35:13,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 05:35:13,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 05:35:13,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:35:13" (1/1) ... [2022-03-20 05:35:13,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:35:13" (1/1) ... [2022-03-20 05:35:13,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:35:13" (1/1) ... [2022-03-20 05:35:13,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:35:13" (1/1) ... [2022-03-20 05:35:13,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:35:13" (1/1) ... [2022-03-20 05:35:13,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:35:13" (1/1) ... [2022-03-20 05:35:13,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:35:13" (1/1) ... [2022-03-20 05:35:13,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 05:35:13,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 05:35:13,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 05:35:13,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 05:35:13,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:35:13" (1/1) ... [2022-03-20 05:35:13,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:35:13,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:13,713 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 05:35:13,716 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 05:35:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 05:35:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 05:35:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 05:35:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 05:35:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 05:35:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 05:35:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 05:35:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 05:35:13,795 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 05:35:13,796 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 05:35:13,926 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 05:35:13,930 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 05:35:13,930 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 05:35:13,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:35:13 BoogieIcfgContainer [2022-03-20 05:35:13,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 05:35:13,932 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 05:35:13,932 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 05:35:13,933 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 05:35:13,935 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:35:13" (1/1) ... [2022-03-20 05:35:13,936 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 05:35:13,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:35:13 BasicIcfg [2022-03-20 05:35:13,949 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 05:35:13,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 05:35:13,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 05:35:13,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 05:35:13,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:35:13" (1/4) ... [2022-03-20 05:35:13,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b568edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:35:13, skipping insertion in model container [2022-03-20 05:35:13,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:35:13" (2/4) ... [2022-03-20 05:35:13,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b568edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:35:13, skipping insertion in model container [2022-03-20 05:35:13,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:35:13" (3/4) ... [2022-03-20 05:35:13,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b568edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:35:13, skipping insertion in model container [2022-03-20 05:35:13,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:35:13" (4/4) ... [2022-03-20 05:35:13,954 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.cJordan [2022-03-20 05:35:13,957 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 05:35:13,957 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 05:35:13,987 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 05:35:13,992 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 05:35:13,992 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 05:35:14,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 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 05:35:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 05:35:14,007 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:14,007 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 05:35:14,008 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2022-03-20 05:35:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:14,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153414414] [2022-03-20 05:35:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:14,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:14,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:14,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384206965] [2022-03-20 05:35:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:14,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:14,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:14,130 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 05:35:14,130 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 05:35:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-20 05:35:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:14,301 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 05:35:14,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:35:14,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:14,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153414414] [2022-03-20 05:35:14,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:14,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384206965] [2022-03-20 05:35:14,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384206965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:35:14,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:35:14,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 05:35:14,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133255796] [2022-03-20 05:35:14,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:35:14,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-20 05:35:14,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:14,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-20 05:35:14,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 05:35:14,333 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 05:35:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:14,351 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-03-20 05:35:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-20 05:35:14,353 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 32 [2022-03-20 05:35:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:14,360 INFO L225 Difference]: With dead ends: 39 [2022-03-20 05:35:14,360 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 05:35:14,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 05:35:14,365 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:14,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:35:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 05:35:14,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 05:35:14,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 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 05:35:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-03-20 05:35:14,395 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-03-20 05:35:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:14,397 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-03-20 05:35:14,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 05:35:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-03-20 05:35:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 05:35:14,399 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:14,399 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 05:35:14,422 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 05:35:14,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-20 05:35:14,608 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:14,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:14,608 INFO L85 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2022-03-20 05:35:14,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:14,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757378856] [2022-03-20 05:35:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:14,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:14,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:14,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016429537] [2022-03-20 05:35:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:14,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:14,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:14,626 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 05:35:14,627 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 05:35:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:14,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 05:35:14,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:14,758 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 05:35:14,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:35:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:14,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757378856] [2022-03-20 05:35:14,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:14,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016429537] [2022-03-20 05:35:14,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016429537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:35:14,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:35:14,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 05:35:14,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326051181] [2022-03-20 05:35:14,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:35:14,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 05:35:14,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:14,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 05:35:14,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 05:35:14,761 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:35:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:14,772 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-03-20 05:35:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 05:35:14,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 05:35:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:14,773 INFO L225 Difference]: With dead ends: 36 [2022-03-20 05:35:14,773 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 05:35:14,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 05:35:14,774 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:14,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:35:14,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 05:35:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-20 05:35:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 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 05:35:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-03-20 05:35:14,803 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-03-20 05:35:14,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:14,803 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-03-20 05:35:14,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:35:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-03-20 05:35:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 05:35:14,804 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:14,804 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 05:35:14,823 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 05:35:15,005 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,SelfDestructingSolverStorable1 [2022-03-20 05:35:15,005 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2022-03-20 05:35:15,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:15,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359122833] [2022-03-20 05:35:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:15,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:15,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:15,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445730850] [2022-03-20 05:35:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:15,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:15,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:15,018 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 05:35:15,020 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 05:35:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:15,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 05:35:15,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:15,120 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 05:35:15,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:15,217 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 05:35:15,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:15,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359122833] [2022-03-20 05:35:15,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:15,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445730850] [2022-03-20 05:35:15,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445730850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:35:15,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:35:15,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 05:35:15,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125005491] [2022-03-20 05:35:15,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:35:15,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 05:35:15,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:15,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 05:35:15,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 05:35:15,227 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 05:35:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:15,285 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2022-03-20 05:35:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 05:35:15,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 34 [2022-03-20 05:35:15,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:15,286 INFO L225 Difference]: With dead ends: 45 [2022-03-20 05:35:15,287 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 05:35:15,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 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 05:35:15,288 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:15,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 127 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:35:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 05:35:15,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-03-20 05:35:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 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 05:35:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-20 05:35:15,293 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-03-20 05:35:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:15,293 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-20 05:35:15,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 05:35:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-20 05:35:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 05:35:15,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:15,294 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, 1, 1] [2022-03-20 05:35:15,311 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 05:35:15,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:15,508 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:15,508 INFO L85 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2022-03-20 05:35:15,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:15,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117787049] [2022-03-20 05:35:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:15,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:15,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:15,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115899654] [2022-03-20 05:35:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:15,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:15,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:15,523 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 05:35:15,524 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 05:35:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:15,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 05:35:15,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:15,668 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 05:35:15,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:15,744 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 05:35:15,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:15,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117787049] [2022-03-20 05:35:15,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:15,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115899654] [2022-03-20 05:35:15,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115899654] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 05:35:15,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:35:15,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 05:35:15,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552712833] [2022-03-20 05:35:15,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:35:15,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:35:15,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:35:15,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:35:15,746 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 05:35:15,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:15,780 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-03-20 05:35:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:35:15,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 36 [2022-03-20 05:35:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:15,783 INFO L225 Difference]: With dead ends: 41 [2022-03-20 05:35:15,783 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 05:35:15,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:35:15,786 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 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 05:35:15,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:35:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 05:35:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-20 05:35:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 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 05:35:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-20 05:35:15,798 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 36 [2022-03-20 05:35:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:15,798 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-20 05:35:15,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 05:35:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-20 05:35:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 05:35:15,799 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:15,799 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 05:35:15,826 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 05:35:15,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:16,000 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:16,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:16,000 INFO L85 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2022-03-20 05:35:16,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:16,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747779753] [2022-03-20 05:35:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:16,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:16,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:16,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028070564] [2022-03-20 05:35:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:16,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:16,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:16,011 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 05:35:16,012 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 05:35:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:16,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 05:35:16,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:16,124 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 05:35:16,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:35:16,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:16,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747779753] [2022-03-20 05:35:16,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:16,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028070564] [2022-03-20 05:35:16,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028070564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:35:16,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:35:16,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:35:16,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981929943] [2022-03-20 05:35:16,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:35:16,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:35:16,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:16,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:35:16,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:35:16,126 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:35:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:16,145 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-03-20 05:35:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:35:16,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 05:35:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:16,146 INFO L225 Difference]: With dead ends: 43 [2022-03-20 05:35:16,146 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 05:35:16,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:35:16,147 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:16,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:35:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 05:35:16,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 05:35:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 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 05:35:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-03-20 05:35:16,151 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2022-03-20 05:35:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:16,151 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-03-20 05:35:16,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:35:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-03-20 05:35:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 05:35:16,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:16,152 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, 1, 1] [2022-03-20 05:35:16,187 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 05:35:16,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:16,380 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:16,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:16,381 INFO L85 PathProgramCache]: Analyzing trace with hash 578094295, now seen corresponding path program 1 times [2022-03-20 05:35:16,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:16,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502144197] [2022-03-20 05:35:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:16,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:16,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:16,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505795546] [2022-03-20 05:35:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:16,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:16,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:16,395 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 05:35:16,396 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 05:35:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:16,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 05:35:16,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 05:35:16,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:16,742 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 05:35:16,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:16,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502144197] [2022-03-20 05:35:16,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:16,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505795546] [2022-03-20 05:35:16,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505795546] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 05:35:16,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:35:16,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 05:35:16,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611765263] [2022-03-20 05:35:16,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:35:16,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:35:16,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:16,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:35:16,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:35:16,744 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 05:35:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:16,777 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-03-20 05:35:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:35:16,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 41 [2022-03-20 05:35:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:16,779 INFO L225 Difference]: With dead ends: 55 [2022-03-20 05:35:16,779 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 05:35:16,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:35:16,781 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 169 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 05:35:16,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 169 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:35:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 05:35:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-20 05:35:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 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 05:35:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-03-20 05:35:16,801 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 41 [2022-03-20 05:35:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:16,802 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-03-20 05:35:16,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 05:35:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-03-20 05:35:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 05:35:16,804 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:16,804 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, 1, 1] [2022-03-20 05:35:16,837 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 05:35:17,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:17,016 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1581112078, now seen corresponding path program 1 times [2022-03-20 05:35:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:17,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49237346] [2022-03-20 05:35:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:17,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:17,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:17,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428383692] [2022-03-20 05:35:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:17,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:17,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:17,032 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 05:35:17,046 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 05:35:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:17,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 05:35:17,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 05:35:17,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 05:35:17,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:17,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49237346] [2022-03-20 05:35:17,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:17,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428383692] [2022-03-20 05:35:17,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428383692] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 05:35:17,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:35:17,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 05:35:17,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308231772] [2022-03-20 05:35:17,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:35:17,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:35:17,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:35:17,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:35:17,340 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:35:17,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:17,367 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-03-20 05:35:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:35:17,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-03-20 05:35:17,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:17,368 INFO L225 Difference]: With dead ends: 59 [2022-03-20 05:35:17,368 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 05:35:17,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:35:17,369 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:17,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:35:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 05:35:17,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-20 05:35:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 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 05:35:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-03-20 05:35:17,382 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 46 [2022-03-20 05:35:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:17,382 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-03-20 05:35:17,382 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:35:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-03-20 05:35:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 05:35:17,382 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:17,383 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, 1, 1] [2022-03-20 05:35:17,415 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 05:35:17,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:17,596 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:17,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1942645143, now seen corresponding path program 1 times [2022-03-20 05:35:17,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:17,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392768040] [2022-03-20 05:35:17,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:17,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:17,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:17,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747404028] [2022-03-20 05:35:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:17,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:17,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:17,610 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 05:35:17,611 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 05:35:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 05:35:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 05:35:17,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:17,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:17,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392768040] [2022-03-20 05:35:17,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:17,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747404028] [2022-03-20 05:35:17,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747404028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:35:17,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:35:17,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 05:35:17,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541860321] [2022-03-20 05:35:17,933 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:35:17,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 05:35:17,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:17,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 05:35:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-20 05:35:17,934 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 05:35:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:18,050 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-03-20 05:35:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 05:35:18,051 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-20 05:35:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:18,051 INFO L225 Difference]: With dead ends: 63 [2022-03-20 05:35:18,051 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 05:35:18,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-20 05:35:18,052 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:18,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 190 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:35:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 05:35:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 05:35:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 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 05:35:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-03-20 05:35:18,055 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 51 [2022-03-20 05:35:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:18,055 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-03-20 05:35:18,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 05:35:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-03-20 05:35:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 05:35:18,056 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:18,056 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, 1, 1] [2022-03-20 05:35:18,095 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 05:35:18,273 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,SelfDestructingSolverStorable7 [2022-03-20 05:35:18,274 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1573186588, now seen corresponding path program 1 times [2022-03-20 05:35:18,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:18,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978780557] [2022-03-20 05:35:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:18,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:18,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:18,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968091904] [2022-03-20 05:35:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:18,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:18,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:18,284 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 05:35:18,285 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 05:35:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:18,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 05:35:18,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 05:35:18,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 05:35:18,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:18,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978780557] [2022-03-20 05:35:18,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:18,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968091904] [2022-03-20 05:35:18,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968091904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:35:18,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:35:18,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 05:35:18,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495435288] [2022-03-20 05:35:18,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:35:18,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 05:35:18,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:18,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 05:35:18,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:35:18,529 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 05:35:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:18,662 INFO L93 Difference]: Finished difference Result 207 states and 242 transitions. [2022-03-20 05:35:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 05:35:18,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 60 [2022-03-20 05:35:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:18,664 INFO L225 Difference]: With dead ends: 207 [2022-03-20 05:35:18,664 INFO L226 Difference]: Without dead ends: 207 [2022-03-20 05:35:18,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:35:18,665 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 119 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:18,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 264 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:35:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-20 05:35:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 199. [2022-03-20 05:35:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 130 states have internal predecessors, (150), 46 states have call successors, (46), 27 states have call predecessors, (46), 26 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 05:35:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 237 transitions. [2022-03-20 05:35:18,678 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 237 transitions. Word has length 60 [2022-03-20 05:35:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:18,678 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 237 transitions. [2022-03-20 05:35:18,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 05:35:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 237 transitions. [2022-03-20 05:35:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 05:35:18,679 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:18,679 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:35:18,726 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 05:35:18,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:18,895 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1491020248, now seen corresponding path program 1 times [2022-03-20 05:35:18,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:18,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231039538] [2022-03-20 05:35:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:18,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:18,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:18,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663448616] [2022-03-20 05:35:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:18,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:18,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:18,905 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 05:35:18,915 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 05:35:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:18,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 05:35:18,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 05:35:19,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 05:35:19,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:19,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231039538] [2022-03-20 05:35:19,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:19,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663448616] [2022-03-20 05:35:19,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663448616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:35:19,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:35:19,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 05:35:19,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291432614] [2022-03-20 05:35:19,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:35:19,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 05:35:19,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 05:35:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:35:19,172 INFO L87 Difference]: Start difference. First operand 199 states and 237 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 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 05:35:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:19,316 INFO L93 Difference]: Finished difference Result 263 states and 342 transitions. [2022-03-20 05:35:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 05:35:19,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 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 61 [2022-03-20 05:35:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:19,318 INFO L225 Difference]: With dead ends: 263 [2022-03-20 05:35:19,318 INFO L226 Difference]: Without dead ends: 263 [2022-03-20 05:35:19,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 05:35:19,319 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 62 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:19,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 387 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:35:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-20 05:35:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 239. [2022-03-20 05:35:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.2222222222222223) internal successors, (187), 156 states have internal predecessors, (187), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-20 05:35:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 303 transitions. [2022-03-20 05:35:19,329 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 303 transitions. Word has length 61 [2022-03-20 05:35:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:19,329 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 303 transitions. [2022-03-20 05:35:19,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 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 05:35:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 303 transitions. [2022-03-20 05:35:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 05:35:19,330 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:19,330 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:35:19,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 05:35:19,552 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,SelfDestructingSolverStorable9 [2022-03-20 05:35:19,552 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:19,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash 317217743, now seen corresponding path program 1 times [2022-03-20 05:35:19,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:19,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950753728] [2022-03-20 05:35:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:19,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:19,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:19,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997117011] [2022-03-20 05:35:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:19,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:19,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:19,561 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 05:35:19,562 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 05:35:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:19,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 05:35:19,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 05:35:19,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 05:35:19,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:19,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950753728] [2022-03-20 05:35:19,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:19,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997117011] [2022-03-20 05:35:19,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997117011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:35:19,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:35:19,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 05:35:19,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672670527] [2022-03-20 05:35:19,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:35:19,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 05:35:19,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 05:35:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:35:19,812 INFO L87 Difference]: Start difference. First operand 239 states and 303 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 05:35:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:19,917 INFO L93 Difference]: Finished difference Result 252 states and 308 transitions. [2022-03-20 05:35:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 05:35:19,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 63 [2022-03-20 05:35:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:19,919 INFO L225 Difference]: With dead ends: 252 [2022-03-20 05:35:19,919 INFO L226 Difference]: Without dead ends: 252 [2022-03-20 05:35:19,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:35:19,920 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 83 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:19,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 266 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:35:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-20 05:35:19,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2022-03-20 05:35:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 165 states have internal predecessors, (190), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-20 05:35:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 306 transitions. [2022-03-20 05:35:19,927 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 306 transitions. Word has length 63 [2022-03-20 05:35:19,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:19,927 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 306 transitions. [2022-03-20 05:35:19,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 05:35:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 306 transitions. [2022-03-20 05:35:19,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 05:35:19,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:19,928 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1] [2022-03-20 05:35:19,949 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 05:35:20,143 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,SelfDestructingSolverStorable10 [2022-03-20 05:35:20,143 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash 918639692, now seen corresponding path program 1 times [2022-03-20 05:35:20,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:20,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757649614] [2022-03-20 05:35:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:20,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:20,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:20,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132101227] [2022-03-20 05:35:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:20,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:20,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:20,156 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 05:35:20,177 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 05:35:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:20,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 05:35:20,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 05:35:20,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 05:35:20,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:20,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757649614] [2022-03-20 05:35:20,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:20,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132101227] [2022-03-20 05:35:20,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132101227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:35:20,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:35:20,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 05:35:20,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331324590] [2022-03-20 05:35:20,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:35:20,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 05:35:20,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:20,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 05:35:20,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-20 05:35:20,584 INFO L87 Difference]: Start difference. First operand 248 states and 306 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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 05:35:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:20,823 INFO L93 Difference]: Finished difference Result 332 states and 429 transitions. [2022-03-20 05:35:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 05:35:20,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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 68 [2022-03-20 05:35:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:20,826 INFO L225 Difference]: With dead ends: 332 [2022-03-20 05:35:20,826 INFO L226 Difference]: Without dead ends: 328 [2022-03-20 05:35:20,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 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 05:35:20,827 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 44 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:20,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 395 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 05:35:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-20 05:35:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2022-03-20 05:35:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 204 states have internal predecessors, (233), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2022-03-20 05:35:20,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 370 transitions. [2022-03-20 05:35:20,836 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 370 transitions. Word has length 68 [2022-03-20 05:35:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:20,836 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 370 transitions. [2022-03-20 05:35:20,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 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 05:35:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 370 transitions. [2022-03-20 05:35:20,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 05:35:20,837 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:20,837 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-03-20 05:35:20,881 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 05:35:21,058 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,SelfDestructingSolverStorable11 [2022-03-20 05:35:21,059 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:21,059 INFO L85 PathProgramCache]: Analyzing trace with hash -210356579, now seen corresponding path program 2 times [2022-03-20 05:35:21,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:21,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734648570] [2022-03-20 05:35:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:21,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:21,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:21,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284388429] [2022-03-20 05:35:21,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:35:21,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:21,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:21,068 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 05:35:21,068 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 05:35:21,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:35:21,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:35:21,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 05:35:21,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 05:35:21,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 05:35:21,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:21,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734648570] [2022-03-20 05:35:21,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:21,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284388429] [2022-03-20 05:35:21,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284388429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:35:21,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:35:21,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-03-20 05:35:21,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857007947] [2022-03-20 05:35:21,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:35:21,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 05:35:21,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 05:35:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-20 05:35:21,788 INFO L87 Difference]: Start difference. First operand 295 states and 370 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 05:35:24,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:35:24,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:24,280 INFO L93 Difference]: Finished difference Result 317 states and 395 transitions. [2022-03-20 05:35:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 05:35:24,281 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 73 [2022-03-20 05:35:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:24,282 INFO L225 Difference]: With dead ends: 317 [2022-03-20 05:35:24,282 INFO L226 Difference]: Without dead ends: 316 [2022-03-20 05:35:24,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-20 05:35:24,283 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 51 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:24,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 351 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 05:35:24,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-03-20 05:35:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 305. [2022-03-20 05:35:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 204 states have (on average 1.1862745098039216) internal successors, (242), 212 states have internal predecessors, (242), 69 states have call successors, (69), 32 states have call predecessors, (69), 31 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-20 05:35:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 376 transitions. [2022-03-20 05:35:24,293 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 376 transitions. Word has length 73 [2022-03-20 05:35:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:24,293 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 376 transitions. [2022-03-20 05:35:24,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 05:35:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 376 transitions. [2022-03-20 05:35:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 05:35:24,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:24,294 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:35:24,315 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 05:35:24,514 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,SelfDestructingSolverStorable12 [2022-03-20 05:35:24,514 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:24,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:24,514 INFO L85 PathProgramCache]: Analyzing trace with hash 952478412, now seen corresponding path program 3 times [2022-03-20 05:35:24,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:24,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250554192] [2022-03-20 05:35:24,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:24,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:24,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:24,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169355837] [2022-03-20 05:35:24,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 05:35:24,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:24,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:24,523 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 05:35:24,524 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 05:35:24,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 05:35:24,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:35:24,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 05:35:24,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-20 05:35:24,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:25,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:25,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250554192] [2022-03-20 05:35:25,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169355837] [2022-03-20 05:35:25,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169355837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:35:25,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:35:25,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 05:35:25,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301571253] [2022-03-20 05:35:25,077 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:35:25,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 05:35:25,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:25,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 05:35:25,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:35:25,078 INFO L87 Difference]: Start difference. First operand 305 states and 376 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 05:35:25,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:25,317 INFO L93 Difference]: Finished difference Result 335 states and 407 transitions. [2022-03-20 05:35:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 05:35:25,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2022-03-20 05:35:25,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:25,319 INFO L225 Difference]: With dead ends: 335 [2022-03-20 05:35:25,319 INFO L226 Difference]: Without dead ends: 333 [2022-03-20 05:35:25,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:35:25,320 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 24 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:25,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 249 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 05:35:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-03-20 05:35:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 330. [2022-03-20 05:35:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 221 states have (on average 1.1764705882352942) internal successors, (260), 228 states have internal predecessors, (260), 73 states have call successors, (73), 37 states have call predecessors, (73), 35 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-20 05:35:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 402 transitions. [2022-03-20 05:35:25,328 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 402 transitions. Word has length 78 [2022-03-20 05:35:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:25,328 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 402 transitions. [2022-03-20 05:35:25,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 05:35:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 402 transitions. [2022-03-20 05:35:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 05:35:25,329 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:25,329 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:35:25,346 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 05:35:25,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:25,546 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:25,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash 900405455, now seen corresponding path program 1 times [2022-03-20 05:35:25,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:25,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396022234] [2022-03-20 05:35:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:25,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:25,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:25,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531035138] [2022-03-20 05:35:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:25,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:25,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:25,571 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 05:35:25,573 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 05:35:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:25,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 05:35:25,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-20 05:35:26,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-03-20 05:35:26,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:26,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396022234] [2022-03-20 05:35:26,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:26,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531035138] [2022-03-20 05:35:26,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531035138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:35:26,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:35:26,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-20 05:35:26,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408886369] [2022-03-20 05:35:26,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:35:26,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 05:35:26,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 05:35:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-20 05:35:26,502 INFO L87 Difference]: Start difference. First operand 330 states and 402 transitions. Second operand has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 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 05:35:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:29,059 INFO L93 Difference]: Finished difference Result 390 states and 484 transitions. [2022-03-20 05:35:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 05:35:29,060 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 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 84 [2022-03-20 05:35:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:29,061 INFO L225 Difference]: With dead ends: 390 [2022-03-20 05:35:29,061 INFO L226 Difference]: Without dead ends: 377 [2022-03-20 05:35:29,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 05:35:29,062 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 87 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:29,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 521 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 05:35:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-20 05:35:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 368. [2022-03-20 05:35:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 247 states have (on average 1.1902834008097165) internal successors, (294), 252 states have internal predecessors, (294), 84 states have call successors, (84), 37 states have call predecessors, (84), 36 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 05:35:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 460 transitions. [2022-03-20 05:35:29,070 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 460 transitions. Word has length 84 [2022-03-20 05:35:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:29,070 INFO L478 AbstractCegarLoop]: Abstraction has 368 states and 460 transitions. [2022-03-20 05:35:29,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 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 05:35:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 460 transitions. [2022-03-20 05:35:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 05:35:29,071 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:29,071 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 05:35:29,090 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 05:35:29,287 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,SelfDestructingSolverStorable14 [2022-03-20 05:35:29,287 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:29,288 INFO L85 PathProgramCache]: Analyzing trace with hash 653404933, now seen corresponding path program 1 times [2022-03-20 05:35:29,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:29,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689840976] [2022-03-20 05:35:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:29,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:29,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:29,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255675007] [2022-03-20 05:35:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:29,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:29,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:29,296 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 05:35:29,297 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 05:35:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:29,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 05:35:29,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-03-20 05:35:30,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:30,368 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:35:31,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:31,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689840976] [2022-03-20 05:35:31,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:31,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255675007] [2022-03-20 05:35:31,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255675007] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 05:35:31,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:35:31,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 05:35:31,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577608041] [2022-03-20 05:35:31,653 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 05:35:31,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 05:35:31,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:31,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 05:35:31,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-20 05:35:31,654 INFO L87 Difference]: Start difference. First operand 368 states and 460 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 05:35:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:32,169 INFO L93 Difference]: Finished difference Result 375 states and 465 transitions. [2022-03-20 05:35:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 05:35:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2022-03-20 05:35:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:32,171 INFO L225 Difference]: With dead ends: 375 [2022-03-20 05:35:32,171 INFO L226 Difference]: Without dead ends: 375 [2022-03-20 05:35:32,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-20 05:35:32,172 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 33 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:32,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 361 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 05:35:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-03-20 05:35:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 372. [2022-03-20 05:35:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 250 states have (on average 1.184) internal successors, (296), 255 states have internal predecessors, (296), 84 states have call successors, (84), 38 states have call predecessors, (84), 37 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 05:35:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 462 transitions. [2022-03-20 05:35:32,180 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 462 transitions. Word has length 101 [2022-03-20 05:35:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:32,180 INFO L478 AbstractCegarLoop]: Abstraction has 372 states and 462 transitions. [2022-03-20 05:35:32,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 05:35:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 462 transitions. [2022-03-20 05:35:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 05:35:32,181 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:32,181 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 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 05:35:32,204 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 05:35:32,398 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,SelfDestructingSolverStorable15 [2022-03-20 05:35:32,398 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:32,399 INFO L85 PathProgramCache]: Analyzing trace with hash 487608439, now seen corresponding path program 4 times [2022-03-20 05:35:32,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:32,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476529967] [2022-03-20 05:35:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:32,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:32,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:32,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597078885] [2022-03-20 05:35:32,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 05:35:32,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:32,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:32,412 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 05:35:32,412 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 05:35:32,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 05:35:32,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:35:32,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 05:35:32,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-20 05:35:32,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:35:32,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:32,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476529967] [2022-03-20 05:35:32,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:32,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597078885] [2022-03-20 05:35:32,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597078885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:35:32,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:35:32,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:35:32,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492311675] [2022-03-20 05:35:32,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:35:32,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:35:32,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:35:32,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:35:32,576 INFO L87 Difference]: Start difference. First operand 372 states and 462 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 05:35:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:32,616 INFO L93 Difference]: Finished difference Result 417 states and 535 transitions. [2022-03-20 05:35:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 05:35:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 105 [2022-03-20 05:35:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:32,618 INFO L225 Difference]: With dead ends: 417 [2022-03-20 05:35:32,618 INFO L226 Difference]: Without dead ends: 417 [2022-03-20 05:35:32,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 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 05:35:32,618 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 12 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:32,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 194 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:35:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-03-20 05:35:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 387. [2022-03-20 05:35:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 259 states have (on average 1.193050193050193) internal successors, (309), 263 states have internal predecessors, (309), 90 states have call successors, (90), 38 states have call predecessors, (90), 37 states have return successors, (88), 85 states have call predecessors, (88), 88 states have call successors, (88) [2022-03-20 05:35:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 487 transitions. [2022-03-20 05:35:32,627 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 487 transitions. Word has length 105 [2022-03-20 05:35:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:32,628 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 487 transitions. [2022-03-20 05:35:32,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 05:35:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 487 transitions. [2022-03-20 05:35:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 05:35:32,629 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:32,629 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:35:32,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 05:35:32,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 05:35:32,849 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:32,849 INFO L85 PathProgramCache]: Analyzing trace with hash 791718745, now seen corresponding path program 1 times [2022-03-20 05:35:32,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:32,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439484504] [2022-03-20 05:35:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:32,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:32,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:32,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795655320] [2022-03-20 05:35:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:32,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:32,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:32,859 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:35:32,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 05:35:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:35:32,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 05:35:32,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-20 05:35:33,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 05:35:33,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:35:33,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439484504] [2022-03-20 05:35:33,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:35:33,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795655320] [2022-03-20 05:35:33,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795655320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:35:33,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:35:33,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 05:35:33,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200382415] [2022-03-20 05:35:33,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:35:33,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 05:35:33,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:35:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 05:35:33,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 05:35:33,321 INFO L87 Difference]: Start difference. First operand 387 states and 487 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-03-20 05:35:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:35:33,678 INFO L93 Difference]: Finished difference Result 1260 states and 1555 transitions. [2022-03-20 05:35:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 05:35:33,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) Word has length 116 [2022-03-20 05:35:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:35:33,682 INFO L225 Difference]: With dead ends: 1260 [2022-03-20 05:35:33,682 INFO L226 Difference]: Without dead ends: 1260 [2022-03-20 05:35:33,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2022-03-20 05:35:33,683 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 296 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 05:35:33,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 458 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 05:35:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-03-20 05:35:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1202. [2022-03-20 05:35:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 771 states have (on average 1.1595330739299612) internal successors, (894), 782 states have internal predecessors, (894), 305 states have call successors, (305), 126 states have call predecessors, (305), 125 states have return successors, (296), 293 states have call predecessors, (296), 296 states have call successors, (296) [2022-03-20 05:35:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1495 transitions. [2022-03-20 05:35:33,707 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1495 transitions. Word has length 116 [2022-03-20 05:35:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:35:33,709 INFO L478 AbstractCegarLoop]: Abstraction has 1202 states and 1495 transitions. [2022-03-20 05:35:33,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-03-20 05:35:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1495 transitions. [2022-03-20 05:35:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 05:35:33,710 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:35:33,710 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 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 05:35:33,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 05:35:33,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 05:35:33,923 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:35:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:35:33,924 INFO L85 PathProgramCache]: Analyzing trace with hash -351372628, now seen corresponding path program 2 times [2022-03-20 05:35:33,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:35:33,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604200598] [2022-03-20 05:35:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:35:33,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:35:33,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:35:33,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128118705] [2022-03-20 05:35:33,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:35:33,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:35:33,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:35:33,933 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:35:33,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 05:35:33,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:35:33,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:35:33,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 05:35:34,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:35:37,557 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:35:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 139 proven. 92 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-03-20 05:35:39,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:35:42,835 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:35:54,962 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 05:36:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 136 proven. 86 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-03-20 05:36:05,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:36:05,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604200598] [2022-03-20 05:36:05,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:36:05,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128118705] [2022-03-20 05:36:05,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128118705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:36:05,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:36:05,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-20 05:36:05,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466848916] [2022-03-20 05:36:05,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:36:05,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 05:36:05,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:36:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 05:36:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=637, Unknown=4, NotChecked=0, Total=812 [2022-03-20 05:36:05,890 INFO L87 Difference]: Start difference. First operand 1202 states and 1495 transitions. Second operand has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) [2022-03-20 05:36:08,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:36:12,241 WARN L534 Checker$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 05:36:24,076 WARN L232 SmtUtils]: Spent 9.00s on a formula simplification. DAG size of input: 127 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:36:31,673 WARN L232 SmtUtils]: Spent 6.92s 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 05:36:36,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:36:38,676 WARN L534 Checker$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 05:36:40,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:36:53,175 WARN L534 Checker$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 05:37:01,214 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:37:10,763 WARN L534 Checker$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 05:37:12,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:37:14,773 WARN L534 Checker$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 05:37:21,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:37:23,536 WARN L534 Checker$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 05:37:25,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:37:30,865 WARN L534 Checker$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 05:37:32,869 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:37:40,761 WARN L534 Checker$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 05:37:49,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:37:58,609 WARN L534 Checker$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 05:38:00,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:38:08,373 WARN L534 Checker$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 05:38:10,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:38:16,374 WARN L534 Checker$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 05:38:18,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:39:09,048 WARN L232 SmtUtils]: Spent 48.56s on a formula simplification. DAG size of input: 147 DAG size of output: 145 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:39:14,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:39:17,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:39:29,057 WARN L232 SmtUtils]: Spent 8.64s on a formula simplification. DAG size of input: 128 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:39:36,132 WARN L232 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 87 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:39:57,741 WARN L232 SmtUtils]: Spent 13.49s on a formula simplification. DAG size of input: 110 DAG size of output: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:39:59,749 WARN L534 Checker$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 05:40:01,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:40:03,770 WARN L534 Checker$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 05:40:12,111 WARN L232 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 146 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:40:14,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:40:16,180 WARN L534 Checker$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 05:40:18,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:40:20,188 WARN L534 Checker$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 05:40:22,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:40:23,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:40:32,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:40:40,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:40:42,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:40:44,617 WARN L534 Checker$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 05:40:46,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:40:48,639 WARN L534 Checker$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 05:42:10,613 WARN L232 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 88 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:42:13,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:42:16,735 WARN L534 Checker$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 05:42:18,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:42:20,780 WARN L534 Checker$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 05:42:29,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:42:31,626 WARN L534 Checker$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 05:42:33,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:42:43,333 WARN L534 Checker$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 05:42:45,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:42:47,338 WARN L534 Checker$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 05:43:04,388 WARN L232 SmtUtils]: Spent 13.73s on a formula simplification. DAG size of input: 108 DAG size of output: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:43:06,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:43:08,521 WARN L534 Checker$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 05:43:11,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:43:13,060 WARN L534 Checker$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 05:43:15,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:43:17,219 WARN L534 Checker$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 05:43:19,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:43:21,232 WARN L534 Checker$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 05:43:23,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:43:25,239 WARN L534 Checker$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 05:43:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:25,240 INFO L93 Difference]: Finished difference Result 1591 states and 2042 transitions. [2022-03-20 05:43:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 05:43:25,242 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) Word has length 124 [2022-03-20 05:43:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:25,247 INFO L225 Difference]: With dead ends: 1591 [2022-03-20 05:43:25,247 INFO L226 Difference]: Without dead ends: 1591 [2022-03-20 05:43:25,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 218 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 320.2s TimeCoverageRelationStatistics Valid=800, Invalid=2719, Unknown=21, NotChecked=0, Total=3540 [2022-03-20 05:43:25,248 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 254 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 368 mSolverCounterUnsat, 57 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 57 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.9s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:25,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 655 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 948 Invalid, 57 Unknown, 0 Unchecked, 142.9s Time] [2022-03-20 05:43:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2022-03-20 05:43:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1545. [2022-03-20 05:43:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 972 states have (on average 1.1779835390946503) internal successors, (1145), 988 states have internal predecessors, (1145), 430 states have call successors, (430), 143 states have call predecessors, (430), 142 states have return successors, (421), 413 states have call predecessors, (421), 421 states have call successors, (421) [2022-03-20 05:43:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 1996 transitions. [2022-03-20 05:43:25,292 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 1996 transitions. Word has length 124 [2022-03-20 05:43:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:25,292 INFO L478 AbstractCegarLoop]: Abstraction has 1545 states and 1996 transitions. [2022-03-20 05:43:25,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) [2022-03-20 05:43:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 1996 transitions. [2022-03-20 05:43:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 05:43:25,295 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:25,296 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 05:43:25,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 05:43:25,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:25,507 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:25,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1703433466, now seen corresponding path program 3 times [2022-03-20 05:43:25,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:25,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271683231] [2022-03-20 05:43:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:25,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:25,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:25,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771820105] [2022-03-20 05:43:25,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 05:43:25,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:25,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:25,517 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:43:25,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 05:43:25,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 05:43:25,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:43:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 05:43:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 100 proven. 57 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 05:43:26,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:44:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 05:44:01,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:44:01,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271683231] [2022-03-20 05:44:01,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:44:01,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771820105] [2022-03-20 05:44:01,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771820105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:44:01,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:44:01,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-20 05:44:01,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442129213] [2022-03-20 05:44:01,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:44:01,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 05:44:01,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:44:01,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 05:44:01,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-03-20 05:44:01,984 INFO L87 Difference]: Start difference. First operand 1545 states and 1996 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) [2022-03-20 05:44:04,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:19,311 WARN L232 SmtUtils]: Spent 13.04s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:44:25,750 WARN L534 Checker$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 05:44:35,762 WARN L232 SmtUtils]: Spent 9.72s on a formula simplification. DAG size of input: 82 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 05:44:37,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:40,590 WARN L534 Checker$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 05:44:42,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:44,599 WARN L534 Checker$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 05:44:46,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:48,951 WARN L534 Checker$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 05:44:52,239 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:53,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:57,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:59,485 WARN L534 Checker$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 05:45:01,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:02,899 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:05,300 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:07,306 WARN L534 Checker$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 05:45:09,555 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:15,686 WARN L534 Checker$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 05:45:17,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:19,706 WARN L534 Checker$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 05:45:21,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:45:23,737 WARN L534 Checker$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 05:45:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:45:24,758 INFO L93 Difference]: Finished difference Result 1860 states and 2429 transitions. [2022-03-20 05:45:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 05:45:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) Word has length 128 [2022-03-20 05:45:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:45:24,765 INFO L225 Difference]: With dead ends: 1860 [2022-03-20 05:45:24,765 INFO L226 Difference]: Without dead ends: 1846 [2022-03-20 05:45:24,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 233 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 05:45:24,767 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 181 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 234 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:45:24,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 592 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 691 Invalid, 19 Unknown, 0 Unchecked, 49.1s Time] [2022-03-20 05:45:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2022-03-20 05:45:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1756. [2022-03-20 05:45:24,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1118 states have (on average 1.1914132379248659) internal successors, (1332), 1130 states have internal predecessors, (1332), 482 states have call successors, (482), 157 states have call predecessors, (482), 155 states have return successors, (479), 468 states have call predecessors, (479), 479 states have call successors, (479) [2022-03-20 05:45:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2293 transitions. [2022-03-20 05:45:24,811 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2293 transitions. Word has length 128 [2022-03-20 05:45:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:45:24,811 INFO L478 AbstractCegarLoop]: Abstraction has 1756 states and 2293 transitions. [2022-03-20 05:45:24,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) [2022-03-20 05:45:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2293 transitions. [2022-03-20 05:45:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 05:45:24,813 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:45:24,813 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 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 05:45:24,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 05:45:25,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:25,032 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:45:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:45:25,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1569660177, now seen corresponding path program 1 times [2022-03-20 05:45:25,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:45:25,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192835723] [2022-03-20 05:45:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:45:25,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:45:25,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:45:25,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432310942] [2022-03-20 05:45:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:45:25,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:25,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:45:25,045 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:45:25,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 05:45:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:45:25,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 05:45:25,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:45:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-20 05:45:25,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:45:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-20 05:45:25,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:45:25,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192835723] [2022-03-20 05:45:25,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:45:25,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432310942] [2022-03-20 05:45:25,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432310942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:45:25,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:45:25,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 05:45:25,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909150377] [2022-03-20 05:45:25,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:45:25,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 05:45:25,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:45:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 05:45:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 05:45:25,563 INFO L87 Difference]: Start difference. First operand 1756 states and 2293 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-20 05:45:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:45:26,007 INFO L93 Difference]: Finished difference Result 1809 states and 2308 transitions. [2022-03-20 05:45:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 05:45:26,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) Word has length 133 [2022-03-20 05:45:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:45:26,014 INFO L225 Difference]: With dead ends: 1809 [2022-03-20 05:45:26,014 INFO L226 Difference]: Without dead ends: 1809 [2022-03-20 05:45:26,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-03-20 05:45:26,015 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 317 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 05:45:26,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 336 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 05:45:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-03-20 05:45:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1777. [2022-03-20 05:45:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1139 states have (on average 1.160667251975417) internal successors, (1322), 1151 states have internal predecessors, (1322), 482 states have call successors, (482), 157 states have call predecessors, (482), 155 states have return successors, (479), 468 states have call predecessors, (479), 479 states have call successors, (479) [2022-03-20 05:45:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2283 transitions. [2022-03-20 05:45:26,052 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2283 transitions. Word has length 133 [2022-03-20 05:45:26,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:45:26,052 INFO L478 AbstractCegarLoop]: Abstraction has 1777 states and 2283 transitions. [2022-03-20 05:45:26,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-20 05:45:26,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2283 transitions. [2022-03-20 05:45:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 05:45:26,053 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:45:26,054 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 05:45:26,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 05:45:26,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:26,271 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:45:26,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:45:26,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1381701507, now seen corresponding path program 2 times [2022-03-20 05:45:26,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:45:26,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278284393] [2022-03-20 05:45:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:45:26,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:45:26,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:45:26,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332636220] [2022-03-20 05:45:26,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:45:26,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:45:26,279 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:45:26,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 05:45:26,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:45:26,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:45:26,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 05:45:26,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:45:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 123 proven. 126 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-20 05:45:28,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:45:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 05:45:29,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:45:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278284393] [2022-03-20 05:45:29,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:45:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332636220] [2022-03-20 05:45:29,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332636220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:45:29,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:45:29,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-20 05:45:29,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813549873] [2022-03-20 05:45:29,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:45:29,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 05:45:29,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:45:29,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 05:45:29,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-20 05:45:29,448 INFO L87 Difference]: Start difference. First operand 1777 states and 2283 transitions. Second operand has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 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 05:45:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:45:34,876 INFO L93 Difference]: Finished difference Result 1897 states and 2418 transitions. [2022-03-20 05:45:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 05:45:34,876 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 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 134 [2022-03-20 05:45:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:45:34,881 INFO L225 Difference]: With dead ends: 1897 [2022-03-20 05:45:34,881 INFO L226 Difference]: Without dead ends: 1888 [2022-03-20 05:45:34,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 05:45:34,882 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 127 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 05:45:34,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 725 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 05:45:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2022-03-20 05:45:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1729. [2022-03-20 05:45:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1098 states have (on average 1.138433515482696) internal successors, (1250), 1113 states have internal predecessors, (1250), 461 states have call successors, (461), 170 states have call predecessors, (461), 169 states have return successors, (459), 445 states have call predecessors, (459), 459 states have call successors, (459) [2022-03-20 05:45:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2170 transitions. [2022-03-20 05:45:34,907 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2170 transitions. Word has length 134 [2022-03-20 05:45:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:45:34,907 INFO L478 AbstractCegarLoop]: Abstraction has 1729 states and 2170 transitions. [2022-03-20 05:45:34,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 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 05:45:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2170 transitions. [2022-03-20 05:45:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-03-20 05:45:34,911 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:45:34,911 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:45:34,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 05:45:35,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:35,127 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:45:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:45:35,128 INFO L85 PathProgramCache]: Analyzing trace with hash -42185316, now seen corresponding path program 2 times [2022-03-20 05:45:35,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:45:35,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901393584] [2022-03-20 05:45:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:45:35,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:45:35,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:45:35,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762011598] [2022-03-20 05:45:35,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:45:35,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:35,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:45:35,137 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:45:35,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 05:45:35,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:45:35,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:45:35,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 05:45:35,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:45:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 72 proven. 2606 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 05:45:35,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:45:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 72 proven. 302 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-20 05:45:36,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:45:36,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901393584] [2022-03-20 05:45:36,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:45:36,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762011598] [2022-03-20 05:45:36,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762011598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:45:36,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:45:36,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 05:45:36,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650658343] [2022-03-20 05:45:36,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:45:36,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 05:45:36,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:45:36,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 05:45:36,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 05:45:36,371 INFO L87 Difference]: Start difference. First operand 1729 states and 2170 transitions. Second operand has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-20 05:45:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:45:37,494 INFO L93 Difference]: Finished difference Result 6927 states and 9405 transitions. [2022-03-20 05:45:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 05:45:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) Word has length 260 [2022-03-20 05:45:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:45:37,516 INFO L225 Difference]: With dead ends: 6927 [2022-03-20 05:45:37,517 INFO L226 Difference]: Without dead ends: 6925 [2022-03-20 05:45:37,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1384, Invalid=2398, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 05:45:37,518 INFO L913 BasicCegarLoop]: 152 mSDtfsCounter, 811 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 05:45:37,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 644 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 05:45:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2022-03-20 05:45:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 6797. [2022-03-20 05:45:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6797 states, 4391 states have (on average 1.223183785014803) internal successors, (5371), 4532 states have internal predecessors, (5371), 1967 states have call successors, (1967), 440 states have call predecessors, (1967), 438 states have return successors, (1951), 1824 states have call predecessors, (1951), 1951 states have call successors, (1951) [2022-03-20 05:45:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6797 states to 6797 states and 9289 transitions. [2022-03-20 05:45:37,687 INFO L78 Accepts]: Start accepts. Automaton has 6797 states and 9289 transitions. Word has length 260 [2022-03-20 05:45:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:45:37,687 INFO L478 AbstractCegarLoop]: Abstraction has 6797 states and 9289 transitions. [2022-03-20 05:45:37,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-20 05:45:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 6797 states and 9289 transitions. [2022-03-20 05:45:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-03-20 05:45:37,692 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:45:37,692 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 5, 5, 4, 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 05:45:37,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 05:45:37,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:37,910 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:45:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:45:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2118395671, now seen corresponding path program 1 times [2022-03-20 05:45:37,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:45:37,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316222110] [2022-03-20 05:45:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:45:37,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:45:37,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:45:37,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565134987] [2022-03-20 05:45:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:45:37,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:37,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:45:37,925 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:45:37,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 05:45:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:45:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 05:45:38,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:45:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2941 backedges. 91 proven. 2610 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-20 05:45:38,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:45:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2941 backedges. 91 proven. 306 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-03-20 05:45:39,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:45:39,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316222110] [2022-03-20 05:45:39,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:45:39,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565134987] [2022-03-20 05:45:39,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565134987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:45:39,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:45:39,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 05:45:39,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166906110] [2022-03-20 05:45:39,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:45:39,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 05:45:39,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:45:39,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 05:45:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 05:45:39,149 INFO L87 Difference]: Start difference. First operand 6797 states and 9289 transitions. Second operand has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-20 05:45:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:45:40,117 INFO L93 Difference]: Finished difference Result 4561 states and 5658 transitions. [2022-03-20 05:45:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 05:45:40,117 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) Word has length 263 [2022-03-20 05:45:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:45:40,129 INFO L225 Difference]: With dead ends: 4561 [2022-03-20 05:45:40,129 INFO L226 Difference]: Without dead ends: 4561 [2022-03-20 05:45:40,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1383, Invalid=2399, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 05:45:40,130 INFO L913 BasicCegarLoop]: 152 mSDtfsCounter, 634 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 05:45:40,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 774 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 05:45:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2022-03-20 05:45:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 4273. [2022-03-20 05:45:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 2618 states have (on average 1.1130634071810543) internal successors, (2914), 2649 states have internal predecessors, (2914), 1229 states have call successors, (1229), 426 states have call predecessors, (1229), 425 states have return successors, (1227), 1197 states have call predecessors, (1227), 1227 states have call successors, (1227) [2022-03-20 05:45:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 5370 transitions. [2022-03-20 05:45:40,189 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 5370 transitions. Word has length 263 [2022-03-20 05:45:40,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:45:40,189 INFO L478 AbstractCegarLoop]: Abstraction has 4273 states and 5370 transitions. [2022-03-20 05:45:40,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-03-20 05:45:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 5370 transitions. [2022-03-20 05:45:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-03-20 05:45:40,200 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:45:40,200 INFO L499 BasicCegarLoop]: trace histogram [77, 76, 76, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 11, 11, 11, 10, 9, 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 05:45:40,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 05:45:40,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:40,426 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:45:40,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:45:40,426 INFO L85 PathProgramCache]: Analyzing trace with hash 678663881, now seen corresponding path program 2 times [2022-03-20 05:45:40,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:45:40,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401162065] [2022-03-20 05:45:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:45:40,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:45:40,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:45:40,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39912825] [2022-03-20 05:45:40,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:45:40,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:40,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:45:40,439 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:45:40,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 05:45:40,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:45:40,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:45:40,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 05:45:40,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:45:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13053 backedges. 184 proven. 12389 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 05:45:41,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:45:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13053 backedges. 184 proven. 1445 refuted. 0 times theorem prover too weak. 11424 trivial. 0 not checked. [2022-03-20 05:45:43,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:45:43,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401162065] [2022-03-20 05:45:43,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:45:43,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39912825] [2022-03-20 05:45:43,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39912825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:45:43,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:45:43,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 54 [2022-03-20 05:45:43,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979785928] [2022-03-20 05:45:43,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:45:43,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 05:45:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:45:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 05:45:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 05:45:43,013 INFO L87 Difference]: Start difference. First operand 4273 states and 5370 transitions. Second operand has 54 states, 54 states have (on average 5.148148148148148) internal successors, (278), 54 states have internal predecessors, (278), 38 states have call successors, (164), 22 states have call predecessors, (164), 21 states have return successors, (162), 36 states have call predecessors, (162), 37 states have call successors, (162) [2022-03-20 05:45:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:45:45,361 INFO L93 Difference]: Finished difference Result 7940 states and 9952 transitions. [2022-03-20 05:45:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-20 05:45:45,361 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.148148148148148) internal successors, (278), 54 states have internal predecessors, (278), 38 states have call successors, (164), 22 states have call predecessors, (164), 21 states have return successors, (162), 36 states have call predecessors, (162), 37 states have call successors, (162) Word has length 516 [2022-03-20 05:45:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:45:45,382 INFO L225 Difference]: With dead ends: 7940 [2022-03-20 05:45:45,383 INFO L226 Difference]: Without dead ends: 7902 [2022-03-20 05:45:45,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1079 GetRequests, 978 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3809, Invalid=6493, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 05:45:45,385 INFO L913 BasicCegarLoop]: 232 mSDtfsCounter, 1498 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 1389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1389 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 05:45:45,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1009 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1389 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 05:45:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7902 states. [2022-03-20 05:45:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7902 to 7438. [2022-03-20 05:45:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 4502 states have (on average 1.1183918258551755) internal successors, (5035), 4553 states have internal predecessors, (5035), 2190 states have call successors, (2190), 747 states have call predecessors, (2190), 745 states have return successors, (2187), 2137 states have call predecessors, (2187), 2187 states have call successors, (2187) [2022-03-20 05:45:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 9412 transitions. [2022-03-20 05:45:45,489 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 9412 transitions. Word has length 516 [2022-03-20 05:45:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:45:45,490 INFO L478 AbstractCegarLoop]: Abstraction has 7438 states and 9412 transitions. [2022-03-20 05:45:45,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.148148148148148) internal successors, (278), 54 states have internal predecessors, (278), 38 states have call successors, (164), 22 states have call predecessors, (164), 21 states have return successors, (162), 36 states have call predecessors, (162), 37 states have call successors, (162) [2022-03-20 05:45:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 9412 transitions. [2022-03-20 05:45:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-03-20 05:45:45,503 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:45:45,503 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 80, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 11, 10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:45:45,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 05:45:45,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 05:45:45,711 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:45:45,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:45:45,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2865793, now seen corresponding path program 3 times [2022-03-20 05:45:45,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:45:45,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932016087] [2022-03-20 05:45:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:45:45,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:45:45,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:45:45,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630571757] [2022-03-20 05:45:45,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 05:45:45,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:45:45,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:45:45,735 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:45:45,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process