/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/egcd3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 22:55:26,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 22:55:26,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 22:55:26,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 22:55:26,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 22:55:26,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 22:55:26,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 22:55:26,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 22:55:26,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 22:55:26,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 22:55:26,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 22:55:26,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 22:55:26,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 22:55:26,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 22:55:26,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 22:55:26,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 22:55:26,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 22:55:26,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 22:55:26,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 22:55:26,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 22:55:26,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 22:55:26,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 22:55:26,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 22:55:26,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 22:55:26,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-14 22:55:26,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-14 22:55:26,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-14 22:55:26,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-14 22:55:26,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-14 22:55:26,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-14 22:55:26,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 22:55:26,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 22:55:26,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 22:55:26,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 22:55:26,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 22:55:26,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 22:55:26,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 22:55:26,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 22:55:26,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 22:55:26,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 22:55:26,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 22:55:26,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 22:55:26,901 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 22:55:26,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 22:55:26,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 22:55:26,903 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 22:55:26,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 22:55:26,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 22:55:26,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 22:55:26,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 22:55:26,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 22:55:26,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 22:55:26,904 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 22:55:26,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 22:55:26,904 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 22:55:26,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 22:55:26,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 22:55:26,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 22:55:26,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 22:55:26,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 22:55:26,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:55:26,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 22:55:26,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 22:55:26,906 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 22:55:26,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 22:55:27,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 22:55:27,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 22:55:27,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 22:55:27,105 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 22:55:27,105 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 22:55:27,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-02-14 22:55:27,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e748b0c03/211956c0084e4e688378278112837d35/FLAGbf61852f0 [2022-02-14 22:55:27,512 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 22:55:27,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-02-14 22:55:27,518 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e748b0c03/211956c0084e4e688378278112837d35/FLAGbf61852f0 [2022-02-14 22:55:27,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e748b0c03/211956c0084e4e688378278112837d35 [2022-02-14 22:55:27,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 22:55:27,932 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 22:55:27,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 22:55:27,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 22:55:27,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 22:55:27,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:55:27" (1/1) ... [2022-02-14 22:55:27,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5549ba59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:27, skipping insertion in model container [2022-02-14 22:55:27,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:55:27" (1/1) ... [2022-02-14 22:55:27,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 22:55:27,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 22:55:28,068 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/egcd3-ll_valuebound10.c[490,503] [2022-02-14 22:55:28,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:55:28,099 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 22:55:28,145 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/egcd3-ll_valuebound10.c[490,503] [2022-02-14 22:55:28,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:55:28,165 INFO L208 MainTranslator]: Completed translation [2022-02-14 22:55:28,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:28 WrapperNode [2022-02-14 22:55:28,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 22:55:28,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 22:55:28,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 22:55:28,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 22:55:28,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:28" (1/1) ... [2022-02-14 22:55:28,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:28" (1/1) ... [2022-02-14 22:55:28,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:28" (1/1) ... [2022-02-14 22:55:28,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:28" (1/1) ... [2022-02-14 22:55:28,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:28" (1/1) ... [2022-02-14 22:55:28,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:28" (1/1) ... [2022-02-14 22:55:28,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:28" (1/1) ... [2022-02-14 22:55:28,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 22:55:28,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 22:55:28,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 22:55:28,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 22:55:28,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:28" (1/1) ... [2022-02-14 22:55:28,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:55:28,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:28,240 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) [2022-02-14 22:55:28,266 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 [2022-02-14 22:55:28,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 22:55:28,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 22:55:28,284 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 22:55:28,284 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 22:55:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 22:55:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 22:55:28,285 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 22:55:28,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 22:55:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 22:55:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 22:55:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 22:55:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 22:55:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 22:55:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 22:55:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 22:55:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 22:55:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 22:55:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 22:55:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 22:55:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 22:55:28,338 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 22:55:28,340 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 22:55:28,513 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 22:55:28,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 22:55:28,519 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-14 22:55:28,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:55:28 BoogieIcfgContainer [2022-02-14 22:55:28,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 22:55:28,521 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 22:55:28,522 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 22:55:28,524 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 22:55:28,527 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:55:28" (1/1) ... [2022-02-14 22:55:28,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:55:28 BasicIcfg [2022-02-14 22:55:28,552 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 22:55:28,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 22:55:28,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 22:55:28,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 22:55:28,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:55:27" (1/4) ... [2022-02-14 22:55:28,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66289a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:55:28, skipping insertion in model container [2022-02-14 22:55:28,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:55:28" (2/4) ... [2022-02-14 22:55:28,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66289a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:55:28, skipping insertion in model container [2022-02-14 22:55:28,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:55:28" (3/4) ... [2022-02-14 22:55:28,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66289a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:55:28, skipping insertion in model container [2022-02-14 22:55:28,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:55:28" (4/4) ... [2022-02-14 22:55:28,559 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.cJordan [2022-02-14 22:55:28,564 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 22:55:28,564 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 22:55:28,600 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 22:55:28,605 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 22:55:28,606 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 22:55:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 22:55:28,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-14 22:55:28,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:28,630 INFO L514 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] [2022-02-14 22:55:28,630 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:28,634 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-02-14 22:55:28,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:28,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790144721] [2022-02-14 22:55:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:28,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:28,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:55:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:28,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:55:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:28,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 22:55:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:28,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 22:55:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:28,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 22:55:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:55:28,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:28,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790144721] [2022-02-14 22:55:28,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790144721] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:55:28,805 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:55:28,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 22:55:28,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856157466] [2022-02-14 22:55:28,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:55:28,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 22:55:28,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:28,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 22:55:28,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:55:28,832 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:55:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:28,890 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-02-14 22:55:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 22:55:28,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-14 22:55:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:28,898 INFO L225 Difference]: With dead ends: 40 [2022-02-14 22:55:28,899 INFO L226 Difference]: Without dead ends: 35 [2022-02-14 22:55:28,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:55:28,903 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:28,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:55:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-14 22:55:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-14 22:55:28,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 22:55:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-02-14 22:55:28,934 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-02-14 22:55:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:28,935 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-02-14 22:55:28,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:55:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-02-14 22:55:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-14 22:55:28,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:28,937 INFO L514 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] [2022-02-14 22:55:28,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 22:55:28,937 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:28,938 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-02-14 22:55:28,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:28,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133417737] [2022-02-14 22:55:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:28,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:28,977 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:28,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103386263] [2022-02-14 22:55:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:28,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:28,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:28,979 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) [2022-02-14 22:55:28,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 22:55:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:29,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:55:29,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 22:55:29,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:55:29,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:29,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133417737] [2022-02-14 22:55:29,216 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:29,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103386263] [2022-02-14 22:55:29,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103386263] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:55:29,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:55:29,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 22:55:29,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350769488] [2022-02-14 22:55:29,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:55:29,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 22:55:29,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:29,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 22:55:29,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:55:29,220 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:55:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:29,321 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-02-14 22:55:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:55:29,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-02-14 22:55:29,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:29,328 INFO L225 Difference]: With dead ends: 47 [2022-02-14 22:55:29,328 INFO L226 Difference]: Without dead ends: 47 [2022-02-14 22:55:29,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 22:55:29,329 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:29,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:55:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-14 22:55:29,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-02-14 22:55:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 22:55:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-14 22:55:29,337 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-02-14 22:55:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:29,338 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-14 22:55:29,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:55:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-14 22:55:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-14 22:55:29,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:29,341 INFO L514 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, 1] [2022-02-14 22:55:29,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 22:55:29,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:29,556 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-02-14 22:55:29,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:29,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94431171] [2022-02-14 22:55:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:29,574 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:29,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329503371] [2022-02-14 22:55:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:29,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:29,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:29,576 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) [2022-02-14 22:55:29,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 22:55:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:29,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 22:55:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 22:55:29,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:55:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:55:29,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:29,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94431171] [2022-02-14 22:55:29,992 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:29,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329503371] [2022-02-14 22:55:29,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329503371] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 22:55:29,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:55:29,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-14 22:55:29,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449687379] [2022-02-14 22:55:29,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:55:29,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:55:29,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:55:29,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:55:29,995 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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) [2022-02-14 22:55:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:30,031 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-02-14 22:55:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:55:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 37 [2022-02-14 22:55:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:30,033 INFO L225 Difference]: With dead ends: 51 [2022-02-14 22:55:30,033 INFO L226 Difference]: Without dead ends: 51 [2022-02-14 22:55:30,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:55:30,035 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 161 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 [2022-02-14 22:55:30,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:55:30,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-14 22:55:30,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-02-14 22:55:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 22:55:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-02-14 22:55:30,044 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-02-14 22:55:30,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:30,044 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-02-14 22:55:30,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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) [2022-02-14 22:55:30,045 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-02-14 22:55:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-14 22:55:30,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:30,046 INFO L514 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] [2022-02-14 22:55:30,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-14 22:55:30,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-14 22:55:30,247 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:30,247 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-02-14 22:55:30,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:30,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512854709] [2022-02-14 22:55:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:30,264 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:30,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67344958] [2022-02-14 22:55:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:30,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:30,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:30,266 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) [2022-02-14 22:55:30,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 22:55:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:30,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:55:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 22:55:30,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:55:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 22:55:30,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:30,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512854709] [2022-02-14 22:55:30,568 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:30,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67344958] [2022-02-14 22:55:30,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67344958] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:55:30,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:55:30,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-14 22:55:30,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092730465] [2022-02-14 22:55:30,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:55:30,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 22:55:30,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 22:55:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-14 22:55:30,571 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:55:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:30,702 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2022-02-14 22:55:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:55:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-02-14 22:55:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:30,704 INFO L225 Difference]: With dead ends: 96 [2022-02-14 22:55:30,704 INFO L226 Difference]: Without dead ends: 96 [2022-02-14 22:55:30,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:55:30,705 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:30,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 249 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:55:30,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-14 22:55:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-02-14 22:55:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 22:55:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-02-14 22:55:30,716 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-02-14 22:55:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:30,717 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-02-14 22:55:30,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:55:30,717 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-02-14 22:55:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-14 22:55:30,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:30,718 INFO L514 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, 1] [2022-02-14 22:55:30,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 22:55:30,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:30,940 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:30,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:30,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-02-14 22:55:30,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:30,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696040464] [2022-02-14 22:55:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:30,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:30,954 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:30,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482435151] [2022-02-14 22:55:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:30,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:30,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:30,957 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) [2022-02-14 22:55:30,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 22:55:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:30,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 22:55:30,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 22:55:31,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:55:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:55:31,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:31,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696040464] [2022-02-14 22:55:31,473 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:31,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482435151] [2022-02-14 22:55:31,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482435151] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 22:55:31,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:55:31,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-02-14 22:55:31,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238234827] [2022-02-14 22:55:31,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:55:31,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 22:55:31,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 22:55:31,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:55:31,474 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (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) [2022-02-14 22:55:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:31,528 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-02-14 22:55:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 22:55:31,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (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 42 [2022-02-14 22:55:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:31,530 INFO L225 Difference]: With dead ends: 77 [2022-02-14 22:55:31,530 INFO L226 Difference]: Without dead ends: 77 [2022-02-14 22:55:31,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-14 22:55:31,531 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:31,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:55:31,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-14 22:55:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-02-14 22:55:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 22:55:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-02-14 22:55:31,539 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-02-14 22:55:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:31,539 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-02-14 22:55:31,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (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) [2022-02-14 22:55:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-02-14 22:55:31,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-14 22:55:31,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:31,540 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-14 22:55:31,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 22:55:31,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:31,760 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:31,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:31,760 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-02-14 22:55:31,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:31,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261731846] [2022-02-14 22:55:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:31,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:31,772 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:31,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344008558] [2022-02-14 22:55:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:31,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:31,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:31,780 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) [2022-02-14 22:55:31,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 22:55:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:31,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 22:55:31,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 22:55:32,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:55:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:55:32,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:32,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261731846] [2022-02-14 22:55:32,317 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:32,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344008558] [2022-02-14 22:55:32,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344008558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:55:32,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:55:32,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-02-14 22:55:32,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364387998] [2022-02-14 22:55:32,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:55:32,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 22:55:32,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:32,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 22:55:32,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-14 22:55:32,321 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:55:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:32,722 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2022-02-14 22:55:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 22:55:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-02-14 22:55:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:32,724 INFO L225 Difference]: With dead ends: 116 [2022-02-14 22:55:32,724 INFO L226 Difference]: Without dead ends: 116 [2022-02-14 22:55:32,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-02-14 22:55:32,725 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 93 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:32,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 370 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 22:55:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-14 22:55:32,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-02-14 22:55:32,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-14 22:55:32,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-02-14 22:55:32,735 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-02-14 22:55:32,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:32,736 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-02-14 22:55:32,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:55:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-02-14 22:55:32,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-14 22:55:32,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:32,737 INFO L514 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, 1] [2022-02-14 22:55:32,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-14 22:55:32,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:32,960 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:32,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-02-14 22:55:32,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:32,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880953458] [2022-02-14 22:55:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:32,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:32,974 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:32,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147310807] [2022-02-14 22:55:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:32,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:32,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:32,977 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) [2022-02-14 22:55:32,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 22:55:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:33,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:55:33,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 22:55:33,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:55:33,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:33,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880953458] [2022-02-14 22:55:33,095 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:33,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147310807] [2022-02-14 22:55:33,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147310807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:55:33,097 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:55:33,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:55:33,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771709415] [2022-02-14 22:55:33,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:55:33,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:55:33,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:33,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:55:33,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:55:33,100 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-02-14 22:55:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:33,133 INFO L93 Difference]: Finished difference Result 149 states and 211 transitions. [2022-02-14 22:55:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:55:33,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 47 [2022-02-14 22:55:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:33,135 INFO L225 Difference]: With dead ends: 149 [2022-02-14 22:55:33,135 INFO L226 Difference]: Without dead ends: 149 [2022-02-14 22:55:33,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:55:33,139 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:33,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:55:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-14 22:55:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-02-14 22:55:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-14 22:55:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-02-14 22:55:33,161 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-02-14 22:55:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:33,161 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-02-14 22:55:33,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-02-14 22:55:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-02-14 22:55:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-14 22:55:33,162 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:33,162 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:55:33,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 22:55:33,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:33,363 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:33,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:33,363 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-02-14 22:55:33,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:33,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800801409] [2022-02-14 22:55:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:33,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:33,374 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:33,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654869070] [2022-02-14 22:55:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:33,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:33,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:33,375 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) [2022-02-14 22:55:33,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 22:55:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:33,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-14 22:55:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 22:55:33,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:55:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:55:33,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:33,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800801409] [2022-02-14 22:55:33,956 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:33,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654869070] [2022-02-14 22:55:33,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654869070] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:55:33,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:55:33,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-02-14 22:55:33,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652097967] [2022-02-14 22:55:33,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:55:33,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-14 22:55:33,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:33,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-14 22:55:33,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-14 22:55:33,959 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-14 22:55:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:37,134 INFO L93 Difference]: Finished difference Result 188 states and 263 transitions. [2022-02-14 22:55:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-14 22:55:37,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-02-14 22:55:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:37,137 INFO L225 Difference]: With dead ends: 188 [2022-02-14 22:55:37,137 INFO L226 Difference]: Without dead ends: 188 [2022-02-14 22:55:37,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-02-14 22:55:37,139 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:37,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 344 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-14 22:55:37,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-14 22:55:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-02-14 22:55:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 118 states have internal predecessors, (142), 56 states have call successors, (56), 10 states have call predecessors, (56), 9 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-02-14 22:55:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 252 transitions. [2022-02-14 22:55:37,151 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 252 transitions. Word has length 47 [2022-02-14 22:55:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:37,151 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 252 transitions. [2022-02-14 22:55:37,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-14 22:55:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 252 transitions. [2022-02-14 22:55:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-14 22:55:37,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:37,153 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:55:37,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 22:55:37,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:37,368 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:37,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-02-14 22:55:37,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:37,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357701055] [2022-02-14 22:55:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:37,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:37,383 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:37,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195587167] [2022-02-14 22:55:37,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:55:37,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:37,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:37,393 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) [2022-02-14 22:55:37,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 22:55:37,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:55:37,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:55:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 22:55:37,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:55:37,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:55:37,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:37,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357701055] [2022-02-14 22:55:37,514 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:37,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195587167] [2022-02-14 22:55:37,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195587167] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:55:37,514 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:55:37,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:55:37,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489316287] [2022-02-14 22:55:37,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:55:37,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:55:37,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:55:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:55:37,516 INFO L87 Difference]: Start difference. First operand 179 states and 252 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-02-14 22:55:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:37,577 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2022-02-14 22:55:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:55:37,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 47 [2022-02-14 22:55:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:37,579 INFO L225 Difference]: With dead ends: 144 [2022-02-14 22:55:37,579 INFO L226 Difference]: Without dead ends: 144 [2022-02-14 22:55:37,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-14 22:55:37,580 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:37,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:55:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-14 22:55:37,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-02-14 22:55:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 38 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-14 22:55:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-02-14 22:55:37,588 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 47 [2022-02-14 22:55:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:37,588 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-02-14 22:55:37,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-02-14 22:55:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-02-14 22:55:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-14 22:55:37,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:37,589 INFO L514 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, 1] [2022-02-14 22:55:37,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 22:55:37,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-14 22:55:37,808 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-02-14 22:55:37,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:37,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639104964] [2022-02-14 22:55:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:37,817 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:37,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003359125] [2022-02-14 22:55:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:37,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:37,826 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) [2022-02-14 22:55:37,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 22:55:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:37,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:55:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 22:55:37,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:55:37,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:37,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639104964] [2022-02-14 22:55:37,958 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:37,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003359125] [2022-02-14 22:55:37,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003359125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:55:37,958 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:55:37,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:55:37,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069920825] [2022-02-14 22:55:37,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:55:37,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:55:37,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:37,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:55:37,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:55:37,960 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-14 22:55:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:37,999 INFO L93 Difference]: Finished difference Result 165 states and 231 transitions. [2022-02-14 22:55:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:55:37,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-02-14 22:55:38,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:38,001 INFO L225 Difference]: With dead ends: 165 [2022-02-14 22:55:38,001 INFO L226 Difference]: Without dead ends: 165 [2022-02-14 22:55:38,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:55:38,002 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:38,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:55:38,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-14 22:55:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-02-14 22:55:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-02-14 22:55:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-02-14 22:55:38,009 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-02-14 22:55:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:38,009 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-02-14 22:55:38,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-14 22:55:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-02-14 22:55:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-14 22:55:38,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:38,011 INFO L514 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, 1, 1, 1] [2022-02-14 22:55:38,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-14 22:55:38,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-14 22:55:38,212 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-02-14 22:55:38,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:38,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386794047] [2022-02-14 22:55:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:38,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:38,229 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:38,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521579223] [2022-02-14 22:55:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:38,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:38,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:38,231 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) [2022-02-14 22:55:38,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 22:55:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:38,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-14 22:55:38,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-02-14 22:55:38,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:55:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-02-14 22:55:39,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:39,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386794047] [2022-02-14 22:55:39,286 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:39,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521579223] [2022-02-14 22:55:39,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521579223] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:55:39,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:55:39,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-02-14 22:55:39,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796583467] [2022-02-14 22:55:39,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:55:39,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 22:55:39,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 22:55:39,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-14 22:55:39,288 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-14 22:55:44,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:55:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:48,245 INFO L93 Difference]: Finished difference Result 292 states and 424 transitions. [2022-02-14 22:55:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-14 22:55:48,246 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 64 [2022-02-14 22:55:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:48,248 INFO L225 Difference]: With dead ends: 292 [2022-02-14 22:55:48,248 INFO L226 Difference]: Without dead ends: 290 [2022-02-14 22:55:48,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-02-14 22:55:48,249 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 136 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:48,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 424 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-02-14 22:55:48,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-14 22:55:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2022-02-14 22:55:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 151 states have internal predecessors, (170), 85 states have call successors, (85), 15 states have call predecessors, (85), 14 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-14 22:55:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 338 transitions. [2022-02-14 22:55:48,261 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 338 transitions. Word has length 64 [2022-02-14 22:55:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:48,262 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 338 transitions. [2022-02-14 22:55:48,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-14 22:55:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 338 transitions. [2022-02-14 22:55:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-14 22:55:48,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:48,263 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-02-14 22:55:48,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-14 22:55:48,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-14 22:55:48,486 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:48,487 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-02-14 22:55:48,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:48,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663587620] [2022-02-14 22:55:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:48,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:48,497 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:48,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125368539] [2022-02-14 22:55:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:48,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:48,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:48,504 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) [2022-02-14 22:55:48,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 22:55:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 22:55:48,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-02-14 22:55:48,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:55:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-02-14 22:55:48,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:48,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663587620] [2022-02-14 22:55:48,907 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:48,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125368539] [2022-02-14 22:55:48,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125368539] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:55:48,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:55:48,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-02-14 22:55:48,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503260888] [2022-02-14 22:55:48,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:55:48,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 22:55:48,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:48,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 22:55:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:55:48,908 INFO L87 Difference]: Start difference. First operand 243 states and 338 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-14 22:55:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:49,077 INFO L93 Difference]: Finished difference Result 345 states and 500 transitions. [2022-02-14 22:55:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:55:49,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 74 [2022-02-14 22:55:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:49,082 INFO L225 Difference]: With dead ends: 345 [2022-02-14 22:55:49,082 INFO L226 Difference]: Without dead ends: 345 [2022-02-14 22:55:49,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:55:49,083 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 26 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:49,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 244 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:55:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-14 22:55:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-02-14 22:55:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 154 states have internal predecessors, (173), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-14 22:55:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 341 transitions. [2022-02-14 22:55:49,095 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 341 transitions. Word has length 74 [2022-02-14 22:55:49,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:49,096 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 341 transitions. [2022-02-14 22:55:49,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-14 22:55:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 341 transitions. [2022-02-14 22:55:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-14 22:55:49,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:49,097 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:55:49,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 22:55:49,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-14 22:55:49,320 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-02-14 22:55:49,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:49,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943838539] [2022-02-14 22:55:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:49,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:49,329 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:49,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180634656] [2022-02-14 22:55:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:49,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:49,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:49,337 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) [2022-02-14 22:55:49,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 22:55:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:55:49,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 22:55:49,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-02-14 22:55:49,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:55:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-02-14 22:55:49,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:49,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943838539] [2022-02-14 22:55:49,836 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:49,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180634656] [2022-02-14 22:55:49,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180634656] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:55:49,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:55:49,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-02-14 22:55:49,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400584276] [2022-02-14 22:55:49,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:55:49,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 22:55:49,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:49,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 22:55:49,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-14 22:55:49,838 INFO L87 Difference]: Start difference. First operand 247 states and 341 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-14 22:55:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:50,173 INFO L93 Difference]: Finished difference Result 321 states and 451 transitions. [2022-02-14 22:55:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 22:55:50,173 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-02-14 22:55:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:50,175 INFO L225 Difference]: With dead ends: 321 [2022-02-14 22:55:50,175 INFO L226 Difference]: Without dead ends: 321 [2022-02-14 22:55:50,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-14 22:55:50,176 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 70 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:50,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 302 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 22:55:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-14 22:55:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 259. [2022-02-14 22:55:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 163 states have internal predecessors, (182), 85 states have call successors, (85), 19 states have call predecessors, (85), 18 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-14 22:55:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 350 transitions. [2022-02-14 22:55:50,202 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 350 transitions. Word has length 72 [2022-02-14 22:55:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:50,202 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 350 transitions. [2022-02-14 22:55:50,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-14 22:55:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 350 transitions. [2022-02-14 22:55:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-14 22:55:50,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:50,204 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:55:50,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-14 22:55:50,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 22:55:50,430 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-02-14 22:55:50,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:50,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328871830] [2022-02-14 22:55:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:50,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:50,442 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:50,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472845824] [2022-02-14 22:55:50,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:55:50,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:50,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:50,444 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) [2022-02-14 22:55:50,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-14 22:55:50,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:55:50,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:55:50,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 22:55:50,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 22:55:50,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:55:50,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:50,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328871830] [2022-02-14 22:55:50,582 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:50,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472845824] [2022-02-14 22:55:50,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472845824] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:55:50,582 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:55:50,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:55:50,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273815505] [2022-02-14 22:55:50,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:55:50,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:55:50,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:50,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:55:50,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:55:50,583 INFO L87 Difference]: Start difference. First operand 259 states and 350 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-14 22:55:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:55:50,631 INFO L93 Difference]: Finished difference Result 264 states and 348 transitions. [2022-02-14 22:55:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:55:50,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-02-14 22:55:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:55:50,633 INFO L225 Difference]: With dead ends: 264 [2022-02-14 22:55:50,633 INFO L226 Difference]: Without dead ends: 264 [2022-02-14 22:55:50,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:55:50,634 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:55:50,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:55:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-14 22:55:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 255. [2022-02-14 22:55:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 160 states have (on average 1.16875) internal successors, (187), 162 states have internal predecessors, (187), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-02-14 22:55:50,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 339 transitions. [2022-02-14 22:55:50,643 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 339 transitions. Word has length 77 [2022-02-14 22:55:50,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:55:50,643 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 339 transitions. [2022-02-14 22:55:50,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-14 22:55:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 339 transitions. [2022-02-14 22:55:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-14 22:55:50,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:55:50,645 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:55:50,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-14 22:55:50,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-14 22:55:50,874 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:55:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:55:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-02-14 22:55:50,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:55:50,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72315949] [2022-02-14 22:55:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:55:50,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:55:50,882 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:55:50,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077418134] [2022-02-14 22:55:50,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:55:50,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:55:50,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:55:50,885 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) [2022-02-14 22:55:50,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-14 22:55:50,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-14 22:55:50,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:55:50,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 73 conjunts are in the unsatisfiable core [2022-02-14 22:55:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:55:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-02-14 22:55:51,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:55:52,742 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 22:55:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-14 22:55:59,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:55:59,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72315949] [2022-02-14 22:55:59,152 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:55:59,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077418134] [2022-02-14 22:55:59,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077418134] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:55:59,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:55:59,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-02-14 22:55:59,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570887721] [2022-02-14 22:55:59,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:55:59,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-14 22:55:59,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:55:59,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-14 22:55:59,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=748, Unknown=1, NotChecked=0, Total=870 [2022-02-14 22:55:59,154 INFO L87 Difference]: Start difference. First operand 255 states and 339 transitions. Second operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-14 22:56:02,955 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 [] [2022-02-14 22:56:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:15,075 INFO L93 Difference]: Finished difference Result 313 states and 414 transitions. [2022-02-14 22:56:15,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-14 22:56:15,076 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 77 [2022-02-14 22:56:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:15,077 INFO L225 Difference]: With dead ends: 313 [2022-02-14 22:56:15,077 INFO L226 Difference]: Without dead ends: 313 [2022-02-14 22:56:15,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=449, Invalid=2520, Unknown=1, NotChecked=0, Total=2970 [2022-02-14 22:56:15,078 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 112 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:15,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 494 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 447 Invalid, 1 Unknown, 95 Unchecked, 3.3s Time] [2022-02-14 22:56:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-14 22:56:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 299. [2022-02-14 22:56:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 192 states have (on average 1.15625) internal successors, (222), 194 states have internal predecessors, (222), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (83), 82 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-14 22:56:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 390 transitions. [2022-02-14 22:56:15,087 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 390 transitions. Word has length 77 [2022-02-14 22:56:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:15,088 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 390 transitions. [2022-02-14 22:56:15,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-14 22:56:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 390 transitions. [2022-02-14 22:56:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-14 22:56:15,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:15,089 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 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, 1] [2022-02-14 22:56:15,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:15,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:15,290 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:15,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:15,290 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-02-14 22:56:15,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:15,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371713951] [2022-02-14 22:56:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:15,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:15,298 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:15,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250347690] [2022-02-14 22:56:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:15,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:15,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:15,299 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) [2022-02-14 22:56:15,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-14 22:56:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 89 conjunts are in the unsatisfiable core [2022-02-14 22:56:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-14 22:56:16,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:56:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-02-14 22:56:17,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:17,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371713951] [2022-02-14 22:56:17,354 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:17,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250347690] [2022-02-14 22:56:17,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250347690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:56:17,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:56:17,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-02-14 22:56:17,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222680207] [2022-02-14 22:56:17,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:56:17,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-14 22:56:17,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-14 22:56:17,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-14 22:56:17,356 INFO L87 Difference]: Start difference. First operand 299 states and 390 transitions. Second operand has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-14 22:56:22,168 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 [] [2022-02-14 22:56:24,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:29,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:32,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:35,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:36,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:41,819 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:43,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:46,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:50,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:55,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:56:57,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:00,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:02,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:05,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:07,391 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 [] [2022-02-14 22:57:07,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:07,543 INFO L93 Difference]: Finished difference Result 515 states and 724 transitions. [2022-02-14 22:57:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-14 22:57:07,543 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2022-02-14 22:57:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:07,546 INFO L225 Difference]: With dead ends: 515 [2022-02-14 22:57:07,546 INFO L226 Difference]: Without dead ends: 513 [2022-02-14 22:57:07,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=849, Invalid=3707, Unknown=0, NotChecked=0, Total=4556 [2022-02-14 22:57:07,548 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 190 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 508 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:07,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 632 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 1554 Invalid, 14 Unknown, 0 Unchecked, 44.1s Time] [2022-02-14 22:57:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-02-14 22:57:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 454. [2022-02-14 22:57:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 265 states have (on average 1.2) internal successors, (318), 267 states have internal predecessors, (318), 161 states have call successors, (161), 28 states have call predecessors, (161), 27 states have return successors, (159), 158 states have call predecessors, (159), 159 states have call successors, (159) [2022-02-14 22:57:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 638 transitions. [2022-02-14 22:57:07,563 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 638 transitions. Word has length 91 [2022-02-14 22:57:07,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:07,564 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 638 transitions. [2022-02-14 22:57:07,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-14 22:57:07,564 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 638 transitions. [2022-02-14 22:57:07,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-14 22:57:07,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:07,565 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-02-14 22:57:07,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-14 22:57:07,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-14 22:57:07,779 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:07,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-02-14 22:57:07,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:07,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537609944] [2022-02-14 22:57:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:07,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:07,787 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:07,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007664267] [2022-02-14 22:57:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:07,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:07,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:07,789 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) [2022-02-14 22:57:07,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-14 22:57:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:07,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-14 22:57:07,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-02-14 22:57:08,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-02-14 22:57:09,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:09,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537609944] [2022-02-14 22:57:09,035 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:09,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007664267] [2022-02-14 22:57:09,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007664267] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:57:09,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:57:09,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-14 22:57:09,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643002544] [2022-02-14 22:57:09,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:57:09,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 22:57:09,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:09,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 22:57:09,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-14 22:57:09,036 INFO L87 Difference]: Start difference. First operand 454 states and 638 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-14 22:57:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:10,674 INFO L93 Difference]: Finished difference Result 939 states and 1423 transitions. [2022-02-14 22:57:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-14 22:57:10,675 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-02-14 22:57:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:10,679 INFO L225 Difference]: With dead ends: 939 [2022-02-14 22:57:10,679 INFO L226 Difference]: Without dead ends: 939 [2022-02-14 22:57:10,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-02-14 22:57:10,680 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 106 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:10,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 388 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-14 22:57:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-02-14 22:57:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 849. [2022-02-14 22:57:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 427 states have (on average 1.2833723653395785) internal successors, (548), 429 states have internal predecessors, (548), 389 states have call successors, (389), 33 states have call predecessors, (389), 32 states have return successors, (387), 386 states have call predecessors, (387), 387 states have call successors, (387) [2022-02-14 22:57:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1324 transitions. [2022-02-14 22:57:10,711 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1324 transitions. Word has length 94 [2022-02-14 22:57:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:10,711 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1324 transitions. [2022-02-14 22:57:10,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-14 22:57:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1324 transitions. [2022-02-14 22:57:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-14 22:57:10,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:10,712 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-02-14 22:57:10,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:10,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-14 22:57:10,927 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:10,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-02-14 22:57:10,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:10,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402933099] [2022-02-14 22:57:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:10,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:10,935 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:10,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683436562] [2022-02-14 22:57:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:10,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:10,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:10,945 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) [2022-02-14 22:57:10,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-14 22:57:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:57:11,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-14 22:57:11,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-02-14 22:57:11,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-02-14 22:57:12,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:12,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402933099] [2022-02-14 22:57:12,541 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:12,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683436562] [2022-02-14 22:57:12,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683436562] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:57:12,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:57:12,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-02-14 22:57:12,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019185595] [2022-02-14 22:57:12,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:57:12,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 22:57:12,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 22:57:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-14 22:57:12,542 INFO L87 Difference]: Start difference. First operand 849 states and 1324 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-02-14 22:57:27,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:43,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:43,098 INFO L93 Difference]: Finished difference Result 1284 states and 2032 transitions. [2022-02-14 22:57:43,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-14 22:57:43,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 94 [2022-02-14 22:57:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:43,105 INFO L225 Difference]: With dead ends: 1284 [2022-02-14 22:57:43,105 INFO L226 Difference]: Without dead ends: 1284 [2022-02-14 22:57:43,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=676, Invalid=2403, Unknown=1, NotChecked=0, Total=3080 [2022-02-14 22:57:43,106 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 143 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:43,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 660 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2022-02-14 22:57:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-02-14 22:57:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1130. [2022-02-14 22:57:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 559 states have (on average 1.29695885509839) internal successors, (725), 561 states have internal predecessors, (725), 533 states have call successors, (533), 38 states have call predecessors, (533), 37 states have return successors, (531), 530 states have call predecessors, (531), 531 states have call successors, (531) [2022-02-14 22:57:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1789 transitions. [2022-02-14 22:57:43,147 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1789 transitions. Word has length 94 [2022-02-14 22:57:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:43,148 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 1789 transitions. [2022-02-14 22:57:43,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-02-14 22:57:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1789 transitions. [2022-02-14 22:57:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-14 22:57:43,149 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:43,149 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-02-14 22:57:43,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:43,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-14 22:57:43,363 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:43,363 INFO L85 PathProgramCache]: Analyzing trace with hash -464781530, now seen corresponding path program 2 times [2022-02-14 22:57:43,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:43,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812051916] [2022-02-14 22:57:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:43,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:43,370 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:43,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732677516] [2022-02-14 22:57:43,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:57:43,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:43,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:43,371 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) [2022-02-14 22:57:43,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-14 22:57:43,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:57:43,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:57:43,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 22:57:43,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-02-14 22:57:43,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-02-14 22:57:43,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:43,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812051916] [2022-02-14 22:57:43,742 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:43,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732677516] [2022-02-14 22:57:43,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732677516] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:57:43,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:57:43,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-02-14 22:57:43,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026205014] [2022-02-14 22:57:43,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:57:43,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 22:57:43,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:43,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 22:57:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:57:43,744 INFO L87 Difference]: Start difference. First operand 1130 states and 1789 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-14 22:57:44,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:44,211 INFO L93 Difference]: Finished difference Result 1296 states and 2048 transitions. [2022-02-14 22:57:44,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-14 22:57:44,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-02-14 22:57:44,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:44,217 INFO L225 Difference]: With dead ends: 1296 [2022-02-14 22:57:44,217 INFO L226 Difference]: Without dead ends: 1296 [2022-02-14 22:57:44,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-02-14 22:57:44,218 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 61 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:44,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 545 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 22:57:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-02-14 22:57:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1099. [2022-02-14 22:57:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 536 states have (on average 1.3022388059701493) internal successors, (698), 538 states have internal predecessors, (698), 525 states have call successors, (525), 38 states have call predecessors, (525), 37 states have return successors, (523), 522 states have call predecessors, (523), 523 states have call successors, (523) [2022-02-14 22:57:44,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1746 transitions. [2022-02-14 22:57:44,257 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1746 transitions. Word has length 99 [2022-02-14 22:57:44,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:44,258 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 1746 transitions. [2022-02-14 22:57:44,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-14 22:57:44,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1746 transitions. [2022-02-14 22:57:44,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-14 22:57:44,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:44,259 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-02-14 22:57:44,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:44,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:44,474 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1063397065, now seen corresponding path program 4 times [2022-02-14 22:57:44,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:44,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055615741] [2022-02-14 22:57:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:44,481 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:44,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382263177] [2022-02-14 22:57:44,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 22:57:44,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:44,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:44,486 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) [2022-02-14 22:57:44,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-14 22:57:44,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 22:57:44,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:57:44,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 85 conjunts are in the unsatisfiable core [2022-02-14 22:57:44,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 56 proven. 62 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-02-14 22:57:45,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:57:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 78 proven. 18 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-02-14 22:57:45,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:57:45,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055615741] [2022-02-14 22:57:45,995 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:57:45,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382263177] [2022-02-14 22:57:45,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382263177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:57:45,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:57:45,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-02-14 22:57:45,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956098011] [2022-02-14 22:57:45,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:57:45,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-14 22:57:45,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:57:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-14 22:57:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-14 22:57:45,997 INFO L87 Difference]: Start difference. First operand 1099 states and 1746 transitions. Second operand has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-02-14 22:57:49,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:56,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:57:58,150 INFO L93 Difference]: Finished difference Result 1260 states and 1991 transitions. [2022-02-14 22:57:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-14 22:57:58,155 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 102 [2022-02-14 22:57:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:57:58,161 INFO L225 Difference]: With dead ends: 1260 [2022-02-14 22:57:58,161 INFO L226 Difference]: Without dead ends: 1260 [2022-02-14 22:57:58,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2022-02-14 22:57:58,163 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 107 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 229 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:57:58,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 484 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 797 Invalid, 2 Unknown, 0 Unchecked, 11.2s Time] [2022-02-14 22:57:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-02-14 22:57:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1241. [2022-02-14 22:57:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 605 states have (on average 1.3024793388429752) internal successors, (788), 607 states have internal predecessors, (788), 593 states have call successors, (593), 43 states have call predecessors, (593), 42 states have return successors, (591), 590 states have call predecessors, (591), 591 states have call successors, (591) [2022-02-14 22:57:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1972 transitions. [2022-02-14 22:57:58,208 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1972 transitions. Word has length 102 [2022-02-14 22:57:58,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:57:58,208 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 1972 transitions. [2022-02-14 22:57:58,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-02-14 22:57:58,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1972 transitions. [2022-02-14 22:57:58,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-14 22:57:58,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:57:58,211 INFO L514 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:57:58,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-14 22:57:58,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:58,428 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:57:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:57:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash -439137229, now seen corresponding path program 2 times [2022-02-14 22:57:58,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:57:58,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022890985] [2022-02-14 22:57:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:57:58,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:57:58,436 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:57:58,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310942453] [2022-02-14 22:57:58,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:57:58,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:57:58,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:57:58,440 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) [2022-02-14 22:57:58,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-14 22:57:58,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:57:58,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:57:58,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 104 conjunts are in the unsatisfiable core [2022-02-14 22:57:58,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:57:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 126 proven. 127 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-02-14 22:57:59,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 160 proven. 41 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-02-14 22:58:03,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:03,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022890985] [2022-02-14 22:58:03,396 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:03,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310942453] [2022-02-14 22:58:03,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310942453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:03,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:03,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-02-14 22:58:03,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591755169] [2022-02-14 22:58:03,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:03,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-14 22:58:03,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:03,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-14 22:58:03,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-02-14 22:58:03,398 INFO L87 Difference]: Start difference. First operand 1241 states and 1972 transitions. Second operand has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2022-02-14 22:58:11,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:58:16,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:58:21,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:58:23,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:58:31,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:58:33,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:58:39,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:58:45,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:58:49,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:02,438 WARN L228 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 94 DAG size of output: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 22:59:04,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:10,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:13,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:15,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:20,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:28,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:34,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:36,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:38,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:41,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:43,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:46,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:47,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:49,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:52,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:59:54,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:00,609 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:04,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:11,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:13,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:16,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.68s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:20,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:22,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:24,935 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:40,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:44,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:45,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:46,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:50,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:51,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:56,589 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:00:59,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:01,837 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:08,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:10,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:14,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:16,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:18,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:21,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:23,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:26,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:27,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:42,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:45,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:47,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:49,061 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:53,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:55,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:01:57,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:01:57,723 INFO L93 Difference]: Finished difference Result 2609 states and 4324 transitions. [2022-02-14 23:01:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-14 23:01:57,724 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 138 [2022-02-14 23:01:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:01:57,735 INFO L225 Difference]: With dead ends: 2609 [2022-02-14 23:01:57,735 INFO L226 Difference]: Without dead ends: 2603 [2022-02-14 23:01:57,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 262 SyntacticMatches, 8 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5358 ImplicationChecksByTransitivity, 78.2s TimeCoverageRelationStatistics Valid=2200, Invalid=12806, Unknown=0, NotChecked=0, Total=15006 [2022-02-14 23:01:57,739 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 204 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 2834 mSolverCounterSat, 794 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 3668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 2834 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:01:57,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1389 Invalid, 3668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 2834 Invalid, 40 Unknown, 0 Unchecked, 159.1s Time] [2022-02-14 23:01:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2022-02-14 23:01:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2077. [2022-02-14 23:01:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 924 states have (on average 1.3474025974025974) internal successors, (1245), 926 states have internal predecessors, (1245), 1101 states have call successors, (1101), 52 states have call predecessors, (1101), 51 states have return successors, (1099), 1098 states have call predecessors, (1099), 1099 states have call successors, (1099) [2022-02-14 23:01:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3445 transitions. [2022-02-14 23:01:57,859 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3445 transitions. Word has length 138 [2022-02-14 23:01:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:01:57,859 INFO L470 AbstractCegarLoop]: Abstraction has 2077 states and 3445 transitions. [2022-02-14 23:01:57,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2022-02-14 23:01:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3445 transitions. [2022-02-14 23:01:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-02-14 23:01:57,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:01:57,863 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:01:57,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-14 23:01:58,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-14 23:01:58,088 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:01:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:01:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash -529470484, now seen corresponding path program 3 times [2022-02-14 23:01:58,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:01:58,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325371775] [2022-02-14 23:01:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:01:58,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:01:58,096 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:01:58,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068386168] [2022-02-14 23:01:58,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 23:01:58,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:01:58,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:01:58,098 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) [2022-02-14 23:01:58,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-14 23:01:58,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-14 23:01:58,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:01:58,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 89 conjunts are in the unsatisfiable core [2022-02-14 23:01:58,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:02:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 75 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-02-14 23:02:00,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:02:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-02-14 23:02:04,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:02:04,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325371775] [2022-02-14 23:02:04,486 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:02:04,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068386168] [2022-02-14 23:02:04,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068386168] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:02:04,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:02:04,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 37 [2022-02-14 23:02:04,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602859957] [2022-02-14 23:02:04,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:02:04,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-14 23:02:04,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:02:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-14 23:02:04,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2022-02-14 23:02:04,488 INFO L87 Difference]: Start difference. First operand 2077 states and 3445 transitions. Second operand has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2022-02-14 23:02:11,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:02:30,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:02:52,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:03:37,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:03:37,525 INFO L93 Difference]: Finished difference Result 3495 states and 5841 transitions. [2022-02-14 23:03:37,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-14 23:03:37,526 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) Word has length 141 [2022-02-14 23:03:37,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:03:37,542 INFO L225 Difference]: With dead ends: 3495 [2022-02-14 23:03:37,542 INFO L226 Difference]: Without dead ends: 3489 [2022-02-14 23:03:37,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 243 SyntacticMatches, 3 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8853 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=4107, Invalid=21333, Unknown=0, NotChecked=0, Total=25440 [2022-02-14 23:03:37,548 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 438 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 2953 mSolverCounterSat, 1384 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 4338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1384 IncrementalHoareTripleChecker+Valid, 2953 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:03:37,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 1604 Invalid, 4338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1384 Valid, 2953 Invalid, 1 Unknown, 0 Unchecked, 41.0s Time] [2022-02-14 23:03:37,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-02-14 23:03:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 2464. [2022-02-14 23:03:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 1110 states have (on average 1.3441441441441442) internal successors, (1492), 1112 states have internal predecessors, (1492), 1297 states have call successors, (1297), 57 states have call predecessors, (1297), 56 states have return successors, (1295), 1294 states have call predecessors, (1295), 1295 states have call successors, (1295) [2022-02-14 23:03:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 4084 transitions. [2022-02-14 23:03:37,674 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 4084 transitions. Word has length 141 [2022-02-14 23:03:37,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:03:37,674 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 4084 transitions. [2022-02-14 23:03:37,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2022-02-14 23:03:37,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 4084 transitions. [2022-02-14 23:03:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-02-14 23:03:37,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:03:37,679 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2022-02-14 23:03:37,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-14 23:03:37,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-14 23:03:37,891 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:03:37,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:03:37,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1830452208, now seen corresponding path program 4 times [2022-02-14 23:03:37,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:03:37,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293887803] [2022-02-14 23:03:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:03:37,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:03:37,899 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:03:37,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377896657] [2022-02-14 23:03:37,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 23:03:37,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:03:37,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:03:37,901 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) [2022-02-14 23:03:37,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-14 23:03:37,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 23:03:37,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:03:37,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 123 conjunts are in the unsatisfiable core [2022-02-14 23:03:37,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:03:40,474 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:03:40,477 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:03:40,480 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:03:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 180 proven. 160 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-02-14 23:03:40,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:03:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 225 proven. 12 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2022-02-14 23:03:43,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:03:43,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293887803] [2022-02-14 23:03:43,280 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:03:43,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377896657] [2022-02-14 23:03:43,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377896657] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:03:43,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:03:43,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 32 [2022-02-14 23:03:43,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593173958] [2022-02-14 23:03:43,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:03:43,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-14 23:03:43,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:03:43,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-14 23:03:43,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-02-14 23:03:43,281 INFO L87 Difference]: Start difference. First operand 2464 states and 4084 transitions. Second operand has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2022-02-14 23:03:49,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:03:51,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:03:55,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:04:06,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:04:11,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:04:14,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:04:15,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:04:19,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:04:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:04:21,014 INFO L93 Difference]: Finished difference Result 3104 states and 5137 transitions. [2022-02-14 23:04:21,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-14 23:04:21,015 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) Word has length 168 [2022-02-14 23:04:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:04:21,030 INFO L225 Difference]: With dead ends: 3104 [2022-02-14 23:04:21,030 INFO L226 Difference]: Without dead ends: 3098 [2022-02-14 23:04:21,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 301 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=647, Invalid=4323, Unknown=0, NotChecked=0, Total=4970 [2022-02-14 23:04:21,032 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 224 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 588 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 2940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time [2022-02-14 23:04:21,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 928 Invalid, 2940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 2348 Invalid, 4 Unknown, 0 Unchecked, 28.8s Time] [2022-02-14 23:04:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2022-02-14 23:04:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2663. [2022-02-14 23:04:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 1174 states have (on average 1.3534923339011926) internal successors, (1589), 1176 states have internal predecessors, (1589), 1425 states have call successors, (1425), 64 states have call predecessors, (1425), 63 states have return successors, (1423), 1422 states have call predecessors, (1423), 1423 states have call successors, (1423) [2022-02-14 23:04:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 4437 transitions. [2022-02-14 23:04:21,169 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 4437 transitions. Word has length 168 [2022-02-14 23:04:21,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:04:21,170 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 4437 transitions. [2022-02-14 23:04:21,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2022-02-14 23:04:21,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 4437 transitions. [2022-02-14 23:04:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-02-14 23:04:21,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:04:21,177 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 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] [2022-02-14 23:04:21,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-14 23:04:21,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:04:21,392 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:04:21,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:04:21,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1625362831, now seen corresponding path program 2 times [2022-02-14 23:04:21,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:04:21,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463825936] [2022-02-14 23:04:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:04:21,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:04:21,400 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:04:21,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428537424] [2022-02-14 23:04:21,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:04:21,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:04:21,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:04:21,404 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) [2022-02-14 23:04:21,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-14 23:04:21,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:04:21,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:04:21,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-14 23:04:21,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:04:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 266 proven. 99 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2022-02-14 23:04:21,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:04:22,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:04:22,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463825936] [2022-02-14 23:04:22,553 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:04:22,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428537424] [2022-02-14 23:04:22,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428537424] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 23:04:22,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:04:22,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-02-14 23:04:22,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121240601] [2022-02-14 23:04:22,554 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 23:04:22,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 23:04:22,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:04:22,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 23:04:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-14 23:04:22,555 INFO L87 Difference]: Start difference. First operand 2663 states and 4437 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-14 23:04:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:04:23,085 INFO L93 Difference]: Finished difference Result 2679 states and 4458 transitions. [2022-02-14 23:04:23,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 23:04:23,087 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) Word has length 182 [2022-02-14 23:04:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:04:23,100 INFO L225 Difference]: With dead ends: 2679 [2022-02-14 23:04:23,100 INFO L226 Difference]: Without dead ends: 2679 [2022-02-14 23:04:23,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2022-02-14 23:04:23,101 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 66 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 23:04:23,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 631 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 23:04:23,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2022-02-14 23:04:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2669. [2022-02-14 23:04:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 1176 states have (on average 1.3537414965986394) internal successors, (1592), 1178 states have internal predecessors, (1592), 1429 states have call successors, (1429), 64 states have call predecessors, (1429), 63 states have return successors, (1427), 1426 states have call predecessors, (1427), 1427 states have call successors, (1427) [2022-02-14 23:04:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 4448 transitions. [2022-02-14 23:04:23,183 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 4448 transitions. Word has length 182 [2022-02-14 23:04:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:04:23,183 INFO L470 AbstractCegarLoop]: Abstraction has 2669 states and 4448 transitions. [2022-02-14 23:04:23,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-14 23:04:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 4448 transitions. [2022-02-14 23:04:23,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-14 23:04:23,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:04:23,189 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:04:23,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-14 23:04:23,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:04:23,408 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:04:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:04:23,409 INFO L85 PathProgramCache]: Analyzing trace with hash 540961160, now seen corresponding path program 2 times [2022-02-14 23:04:23,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:04:23,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192321696] [2022-02-14 23:04:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:04:23,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:04:23,417 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:04:23,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289300709] [2022-02-14 23:04:23,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:04:23,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:04:23,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:04:23,425 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) [2022-02-14 23:04:23,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-14 23:04:23,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:04:23,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:04:23,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 23:04:23,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:04:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 269 proven. 102 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2022-02-14 23:04:23,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:04:24,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:04:24,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192321696] [2022-02-14 23:04:24,607 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:04:24,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289300709] [2022-02-14 23:04:24,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289300709] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 23:04:24,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:04:24,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-02-14 23:04:24,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468503993] [2022-02-14 23:04:24,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 23:04:24,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 23:04:24,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:04:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 23:04:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-02-14 23:04:24,609 INFO L87 Difference]: Start difference. First operand 2669 states and 4448 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-14 23:04:25,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:04:25,073 INFO L93 Difference]: Finished difference Result 2830 states and 4669 transitions. [2022-02-14 23:04:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 23:04:25,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) Word has length 187 [2022-02-14 23:04:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:04:25,087 INFO L225 Difference]: With dead ends: 2830 [2022-02-14 23:04:25,087 INFO L226 Difference]: Without dead ends: 2830 [2022-02-14 23:04:25,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2022-02-14 23:04:25,088 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 61 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 23:04:25,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 546 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 23:04:25,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2022-02-14 23:04:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2744. [2022-02-14 23:04:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 1203 states have (on average 1.3557772236076475) internal successors, (1631), 1205 states have internal predecessors, (1631), 1477 states have call successors, (1477), 64 states have call predecessors, (1477), 63 states have return successors, (1475), 1474 states have call predecessors, (1475), 1475 states have call successors, (1475) [2022-02-14 23:04:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 4583 transitions. [2022-02-14 23:04:25,173 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 4583 transitions. Word has length 187 [2022-02-14 23:04:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:04:25,173 INFO L470 AbstractCegarLoop]: Abstraction has 2744 states and 4583 transitions. [2022-02-14 23:04:25,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-14 23:04:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 4583 transitions. [2022-02-14 23:04:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-02-14 23:04:25,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:04:25,194 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:04:25,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-14 23:04:25,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-14 23:04:25,415 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:04:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:04:25,416 INFO L85 PathProgramCache]: Analyzing trace with hash -830993703, now seen corresponding path program 5 times [2022-02-14 23:04:25,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:04:25,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372373571] [2022-02-14 23:04:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:04:25,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:04:25,426 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:04:25,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012499430] [2022-02-14 23:04:25,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 23:04:25,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:04:25,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:04:25,427 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) [2022-02-14 23:04:25,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-14 23:04:25,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-14 23:04:25,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:04:25,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 23:04:25,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:04:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 639 proven. 18 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2022-02-14 23:04:25,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:04:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 143 proven. 18 refuted. 0 times theorem prover too weak. 1153 trivial. 0 not checked. [2022-02-14 23:04:26,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:04:26,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372373571] [2022-02-14 23:04:26,146 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:04:26,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012499430] [2022-02-14 23:04:26,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012499430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:04:26,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:04:26,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-02-14 23:04:26,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993950636] [2022-02-14 23:04:26,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:04:26,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 23:04:26,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:04:26,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 23:04:26,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-14 23:04:26,147 INFO L87 Difference]: Start difference. First operand 2744 states and 4583 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2022-02-14 23:04:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:04:26,369 INFO L93 Difference]: Finished difference Result 2866 states and 4718 transitions. [2022-02-14 23:04:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 23:04:26,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) Word has length 190 [2022-02-14 23:04:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:04:26,380 INFO L225 Difference]: With dead ends: 2866 [2022-02-14 23:04:26,380 INFO L226 Difference]: Without dead ends: 2866 [2022-02-14 23:04:26,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 371 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-14 23:04:26,381 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:04:26,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 291 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 23:04:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2022-02-14 23:04:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2693. [2022-02-14 23:04:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 1222 states have (on average 1.3387888707037643) internal successors, (1636), 1247 states have internal predecessors, (1636), 1408 states have call successors, (1408), 63 states have call predecessors, (1408), 62 states have return successors, (1406), 1382 states have call predecessors, (1406), 1406 states have call successors, (1406) [2022-02-14 23:04:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 4450 transitions. [2022-02-14 23:04:26,460 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 4450 transitions. Word has length 190 [2022-02-14 23:04:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:04:26,460 INFO L470 AbstractCegarLoop]: Abstraction has 2693 states and 4450 transitions. [2022-02-14 23:04:26,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2022-02-14 23:04:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 4450 transitions. [2022-02-14 23:04:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-02-14 23:04:26,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:04:26,466 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 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] [2022-02-14 23:04:26,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-14 23:04:26,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-14 23:04:26,681 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:04:26,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:04:26,681 INFO L85 PathProgramCache]: Analyzing trace with hash -992821454, now seen corresponding path program 3 times [2022-02-14 23:04:26,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:04:26,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820345244] [2022-02-14 23:04:26,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:04:26,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:04:26,692 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:04:26,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31441083] [2022-02-14 23:04:26,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 23:04:26,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:04:26,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:04:26,693 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) [2022-02-14 23:04:26,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-14 23:04:26,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-14 23:04:26,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:04:26,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 23:04:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:04:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 176 proven. 37 refuted. 0 times theorem prover too weak. 1767 trivial. 0 not checked. [2022-02-14 23:04:27,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:04:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 140 proven. 13 refuted. 0 times theorem prover too weak. 1827 trivial. 0 not checked. [2022-02-14 23:04:27,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:04:27,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820345244] [2022-02-14 23:04:27,552 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:04:27,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31441083] [2022-02-14 23:04:27,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31441083] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:04:27,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:04:27,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-02-14 23:04:27,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917335787] [2022-02-14 23:04:27,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:04:27,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 23:04:27,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:04:27,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 23:04:27,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-14 23:04:27,553 INFO L87 Difference]: Start difference. First operand 2693 states and 4450 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-02-14 23:04:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:04:27,933 INFO L93 Difference]: Finished difference Result 3882 states and 6503 transitions. [2022-02-14 23:04:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 23:04:27,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) Word has length 204 [2022-02-14 23:04:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:04:27,945 INFO L225 Difference]: With dead ends: 3882 [2022-02-14 23:04:27,945 INFO L226 Difference]: Without dead ends: 3880 [2022-02-14 23:04:27,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 394 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-02-14 23:04:27,946 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 23:04:27,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 325 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 23:04:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2022-02-14 23:04:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 2565. [2022-02-14 23:04:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 1171 states have (on average 1.3330486763450042) internal successors, (1561), 1193 states have internal predecessors, (1561), 1331 states have call successors, (1331), 64 states have call predecessors, (1331), 62 states have return successors, (1329), 1307 states have call predecessors, (1329), 1329 states have call successors, (1329) [2022-02-14 23:04:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 4221 transitions. [2022-02-14 23:04:28,057 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 4221 transitions. Word has length 204 [2022-02-14 23:04:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:04:28,058 INFO L470 AbstractCegarLoop]: Abstraction has 2565 states and 4221 transitions. [2022-02-14 23:04:28,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-02-14 23:04:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 4221 transitions. [2022-02-14 23:04:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-02-14 23:04:28,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:04:28,064 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:04:28,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-14 23:04:28,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-14 23:04:28,286 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:04:28,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:04:28,287 INFO L85 PathProgramCache]: Analyzing trace with hash 147951836, now seen corresponding path program 6 times [2022-02-14 23:04:28,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:04:28,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677696045] [2022-02-14 23:04:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:04:28,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:04:28,295 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:04:28,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041762586] [2022-02-14 23:04:28,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 23:04:28,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:04:28,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:04:28,298 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:04:28,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-14 23:04:28,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-14 23:04:28,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:04:28,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 77 conjunts are in the unsatisfiable core [2022-02-14 23:04:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:04:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 171 proven. 184 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2022-02-14 23:04:41,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:04:44,821 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:04:48,072 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:04:53,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:04:53,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677696045] [2022-02-14 23:04:53,153 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:04:53,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041762586] [2022-02-14 23:04:53,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041762586] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 23:04:53,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:04:53,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-02-14 23:04:53,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95204535] [2022-02-14 23:04:53,153 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 23:04:53,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-14 23:04:53,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:04:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-14 23:04:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2022-02-14 23:04:53,155 INFO L87 Difference]: Start difference. First operand 2565 states and 4221 transitions. Second operand has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2022-02-14 23:05:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:05:04,534 INFO L93 Difference]: Finished difference Result 3210 states and 5333 transitions. [2022-02-14 23:05:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-14 23:05:04,535 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 204 [2022-02-14 23:05:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:05:04,544 INFO L225 Difference]: With dead ends: 3210 [2022-02-14 23:05:04,544 INFO L226 Difference]: Without dead ends: 3192 [2022-02-14 23:05:04,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=456, Invalid=2966, Unknown=0, NotChecked=0, Total=3422 [2022-02-14 23:05:04,545 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 84 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-14 23:05:04,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 870 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1442 Invalid, 0 Unknown, 129 Unchecked, 2.7s Time] [2022-02-14 23:05:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2022-02-14 23:05:04,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 2534. [2022-02-14 23:05:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 1167 states have (on average 1.3213367609254498) internal successors, (1542), 1187 states have internal predecessors, (1542), 1307 states have call successors, (1307), 61 states have call predecessors, (1307), 59 states have return successors, (1305), 1285 states have call predecessors, (1305), 1305 states have call successors, (1305) [2022-02-14 23:05:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 4154 transitions. [2022-02-14 23:05:04,615 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 4154 transitions. Word has length 204 [2022-02-14 23:05:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:05:04,615 INFO L470 AbstractCegarLoop]: Abstraction has 2534 states and 4154 transitions. [2022-02-14 23:05:04,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2022-02-14 23:05:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 4154 transitions. [2022-02-14 23:05:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-02-14 23:05:04,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:05:04,622 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:05:04,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-14 23:05:04,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-14 23:05:04,844 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:05:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:05:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2054978666, now seen corresponding path program 7 times [2022-02-14 23:05:04,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:05:04,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383592450] [2022-02-14 23:05:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:05:04,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:05:04,852 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:05:04,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602184056] [2022-02-14 23:05:04,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 23:05:04,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:05:04,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:05:04,855 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:05:04,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-14 23:05:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:05:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-14 23:05:04,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:05:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 527 proven. 60 refuted. 0 times theorem prover too weak. 1179 trivial. 0 not checked. [2022-02-14 23:05:05,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:05:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 151 proven. 60 refuted. 0 times theorem prover too weak. 1555 trivial. 0 not checked. [2022-02-14 23:05:05,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:05:05,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383592450] [2022-02-14 23:05:05,600 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:05:05,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602184056] [2022-02-14 23:05:05,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602184056] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:05:05,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:05:05,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2022-02-14 23:05:05,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883675425] [2022-02-14 23:05:05,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:05:05,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 23:05:05,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:05:05,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 23:05:05,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:05:05,602 INFO L87 Difference]: Start difference. First operand 2534 states and 4154 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 8 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 8 states have call predecessors, (41), 8 states have call successors, (41) [2022-02-14 23:05:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:05:06,323 INFO L93 Difference]: Finished difference Result 3198 states and 5235 transitions. [2022-02-14 23:05:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-14 23:05:06,323 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 8 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 8 states have call predecessors, (41), 8 states have call successors, (41) Word has length 212 [2022-02-14 23:05:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:05:06,334 INFO L225 Difference]: With dead ends: 3198 [2022-02-14 23:05:06,334 INFO L226 Difference]: Without dead ends: 3198 [2022-02-14 23:05:06,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 412 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-02-14 23:05:06,340 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 26 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 23:05:06,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 484 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 23:05:06,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2022-02-14 23:05:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2961. [2022-02-14 23:05:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 1367 states have (on average 1.3204096561814191) internal successors, (1805), 1388 states have internal predecessors, (1805), 1534 states have call successors, (1534), 61 states have call predecessors, (1534), 59 states have return successors, (1532), 1511 states have call predecessors, (1532), 1532 states have call successors, (1532) [2022-02-14 23:05:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 4871 transitions. [2022-02-14 23:05:06,416 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 4871 transitions. Word has length 212 [2022-02-14 23:05:06,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:05:06,416 INFO L470 AbstractCegarLoop]: Abstraction has 2961 states and 4871 transitions. [2022-02-14 23:05:06,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 8 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 8 states have call predecessors, (41), 8 states have call successors, (41) [2022-02-14 23:05:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 4871 transitions. [2022-02-14 23:05:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-02-14 23:05:06,423 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:05:06,423 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:05:06,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-14 23:05:06,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-14 23:05:06,639 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:05:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:05:06,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1525405802, now seen corresponding path program 8 times [2022-02-14 23:05:06,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:05:06,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342735006] [2022-02-14 23:05:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:05:06,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:05:06,649 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:05:06,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41609763] [2022-02-14 23:05:06,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:05:06,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:05:06,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:05:06,651 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:05:06,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-14 23:05:06,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:05:06,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:05:06,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 23:05:06,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:05:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 530 proven. 85 refuted. 0 times theorem prover too weak. 1151 trivial. 0 not checked. [2022-02-14 23:05:07,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:05:31,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:05:31,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342735006] [2022-02-14 23:05:31,700 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:05:31,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41609763] [2022-02-14 23:05:31,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41609763] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 23:05:31,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:05:31,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-02-14 23:05:31,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841132940] [2022-02-14 23:05:31,701 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 23:05:31,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 23:05:31,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:05:31,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 23:05:31,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=939, Unknown=10, NotChecked=0, Total=1056 [2022-02-14 23:05:31,702 INFO L87 Difference]: Start difference. First operand 2961 states and 4871 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-02-14 23:05:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:05:33,724 INFO L93 Difference]: Finished difference Result 3463 states and 5707 transitions. [2022-02-14 23:05:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-14 23:05:33,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) Word has length 212 [2022-02-14 23:05:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:05:33,733 INFO L225 Difference]: With dead ends: 3463 [2022-02-14 23:05:33,734 INFO L226 Difference]: Without dead ends: 3463 [2022-02-14 23:05:33,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=896, Invalid=3786, Unknown=10, NotChecked=0, Total=4692 [2022-02-14 23:05:33,735 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 136 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 23:05:33,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 732 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 23:05:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3463 states. [2022-02-14 23:05:33,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3463 to 3412. [2022-02-14 23:05:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 1564 states have (on average 1.326086956521739) internal successors, (2074), 1590 states have internal predecessors, (2074), 1788 states have call successors, (1788), 61 states have call predecessors, (1788), 59 states have return successors, (1786), 1760 states have call predecessors, (1786), 1786 states have call successors, (1786) [2022-02-14 23:05:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 5648 transitions. [2022-02-14 23:05:33,825 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 5648 transitions. Word has length 212 [2022-02-14 23:05:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:05:33,825 INFO L470 AbstractCegarLoop]: Abstraction has 3412 states and 5648 transitions. [2022-02-14 23:05:33,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-02-14 23:05:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 5648 transitions. [2022-02-14 23:05:33,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-02-14 23:05:33,832 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:05:33,832 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:05:33,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-14 23:05:34,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:05:34,055 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:05:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:05:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1445594575, now seen corresponding path program 9 times [2022-02-14 23:05:34,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:05:34,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837451560] [2022-02-14 23:05:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:05:34,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:05:34,063 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:05:34,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372275052] [2022-02-14 23:05:34,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 23:05:34,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:05:34,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:05:34,066 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:05:34,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-14 23:05:34,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-14 23:05:34,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:05:34,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 64 conjunts are in the unsatisfiable core [2022-02-14 23:05:34,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:05:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1789 backedges. 280 proven. 160 refuted. 0 times theorem prover too weak. 1349 trivial. 0 not checked. [2022-02-14 23:05:57,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:06:02,144 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:07:41,374 WARN L860 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~p~0_BEFORE_CALL_206 Int) (v_main_~k~0_BEFORE_CALL_288 Int) (v_main_~r~0_BEFORE_CALL_202 Int) (v_main_~x~0_BEFORE_CALL_280 Int) (v_main_~d~0_BEFORE_CALL_184 Int) (v_main_~q~0_BEFORE_CALL_216 Int) (v_main_~y~0_BEFORE_CALL_260 Int) (v_main_~b~0_BEFORE_CALL_474 Int) (v_main_~s~0_BEFORE_CALL_220 Int)) (or (= (mod (* v_main_~d~0_BEFORE_CALL_184 v_main_~b~0_BEFORE_CALL_474) v_main_~b~0_BEFORE_CALL_474) 0) (<= v_main_~b~0_BEFORE_CALL_474 0) (= (let ((.cse0 (+ v_main_~k~0_BEFORE_CALL_288 v_main_~d~0_BEFORE_CALL_184))) (+ (* (+ (* (- 1) (* .cse0 v_main_~s~0_BEFORE_CALL_220)) v_main_~r~0_BEFORE_CALL_202) v_main_~y~0_BEFORE_CALL_260) v_main_~b~0_BEFORE_CALL_474 (* (+ v_main_~p~0_BEFORE_CALL_206 (* (- 1) .cse0 v_main_~q~0_BEFORE_CALL_216)) v_main_~x~0_BEFORE_CALL_280))) (+ (* v_main_~x~0_BEFORE_CALL_280 v_main_~q~0_BEFORE_CALL_216) (* v_main_~y~0_BEFORE_CALL_260 v_main_~s~0_BEFORE_CALL_220))))))) is different from true [2022-02-14 23:08:33,533 WARN L860 $PredicateComparison]: unable to prove that (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~p~0_BEFORE_CALL_206 Int) (v_main_~k~0_BEFORE_CALL_288 Int) (v_main_~r~0_BEFORE_CALL_202 Int) (v_main_~x~0_BEFORE_CALL_280 Int) (v_main_~d~0_BEFORE_CALL_184 Int) (v_main_~q~0_BEFORE_CALL_216 Int) (v_main_~y~0_BEFORE_CALL_260 Int) (v_main_~b~0_BEFORE_CALL_474 Int) (v_main_~s~0_BEFORE_CALL_220 Int)) (or (= (mod (* v_main_~d~0_BEFORE_CALL_184 v_main_~b~0_BEFORE_CALL_474) v_main_~b~0_BEFORE_CALL_474) 0) (<= v_main_~b~0_BEFORE_CALL_474 0) (= (let ((.cse0 (+ v_main_~k~0_BEFORE_CALL_288 v_main_~d~0_BEFORE_CALL_184))) (+ (* (+ (* (- 1) (* .cse0 v_main_~s~0_BEFORE_CALL_220)) v_main_~r~0_BEFORE_CALL_202) v_main_~y~0_BEFORE_CALL_260) v_main_~b~0_BEFORE_CALL_474 (* (+ v_main_~p~0_BEFORE_CALL_206 (* (- 1) .cse0 v_main_~q~0_BEFORE_CALL_216)) v_main_~x~0_BEFORE_CALL_280))) (+ (* v_main_~x~0_BEFORE_CALL_280 v_main_~q~0_BEFORE_CALL_216) (* v_main_~y~0_BEFORE_CALL_260 v_main_~s~0_BEFORE_CALL_220))))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-02-14 23:08:59,612 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~p~0_BEFORE_CALL_206 Int) (v_main_~k~0_BEFORE_CALL_288 Int) (v_main_~r~0_BEFORE_CALL_202 Int) (v_main_~x~0_BEFORE_CALL_280 Int) (v_main_~d~0_BEFORE_CALL_184 Int) (v_main_~q~0_BEFORE_CALL_216 Int) (v_main_~y~0_BEFORE_CALL_260 Int) (v_main_~b~0_BEFORE_CALL_474 Int) (v_main_~s~0_BEFORE_CALL_220 Int)) (or (= (mod (* v_main_~d~0_BEFORE_CALL_184 v_main_~b~0_BEFORE_CALL_474) v_main_~b~0_BEFORE_CALL_474) 0) (<= v_main_~b~0_BEFORE_CALL_474 0) (= (let ((.cse0 (+ v_main_~k~0_BEFORE_CALL_288 v_main_~d~0_BEFORE_CALL_184))) (+ (* (+ (* (- 1) (* .cse0 v_main_~s~0_BEFORE_CALL_220)) v_main_~r~0_BEFORE_CALL_202) v_main_~y~0_BEFORE_CALL_260) v_main_~b~0_BEFORE_CALL_474 (* (+ v_main_~p~0_BEFORE_CALL_206 (* (- 1) .cse0 v_main_~q~0_BEFORE_CALL_216)) v_main_~x~0_BEFORE_CALL_280))) (+ (* v_main_~x~0_BEFORE_CALL_280 v_main_~q~0_BEFORE_CALL_216) (* v_main_~y~0_BEFORE_CALL_260 v_main_~s~0_BEFORE_CALL_220)))))) is different from true [2022-02-14 23:09:05,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:09:05,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837451560] [2022-02-14 23:09:05,831 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:09:05,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372275052] [2022-02-14 23:09:05,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372275052] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 23:09:05,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:09:05,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-02-14 23:09:05,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456798140] [2022-02-14 23:09:05,831 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 23:09:05,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-14 23:09:05,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:09:05,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-14 23:09:05,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=841, Unknown=3, NotChecked=180, Total=1122 [2022-02-14 23:09:05,832 INFO L87 Difference]: Start difference. First operand 3412 states and 5648 transitions. Second operand has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-02-14 23:09:13,050 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 [] [2022-02-14 23:09:17,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:09:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:09:31,197 INFO L93 Difference]: Finished difference Result 4361 states and 7263 transitions. [2022-02-14 23:09:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-14 23:09:31,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 217 [2022-02-14 23:09:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:09:31,210 INFO L225 Difference]: With dead ends: 4361 [2022-02-14 23:09:31,210 INFO L226 Difference]: Without dead ends: 4358 [2022-02-14 23:09:31,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=232, Invalid=1939, Unknown=3, NotChecked=276, Total=2450 [2022-02-14 23:09:31,211 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 82 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 98 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-02-14 23:09:31,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1056 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1234 Invalid, 1 Unknown, 173 Unchecked, 12.3s Time] [2022-02-14 23:09:31,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2022-02-14 23:09:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 3704. [2022-02-14 23:09:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 1692 states have (on average 1.3274231678486998) internal successors, (2246), 1719 states have internal predecessors, (2246), 1947 states have call successors, (1947), 66 states have call predecessors, (1947), 64 states have return successors, (1945), 1918 states have call predecessors, (1945), 1945 states have call successors, (1945) [2022-02-14 23:09:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 6138 transitions. [2022-02-14 23:09:31,309 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 6138 transitions. Word has length 217 [2022-02-14 23:09:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:09:31,309 INFO L470 AbstractCegarLoop]: Abstraction has 3704 states and 6138 transitions. [2022-02-14 23:09:31,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-02-14 23:09:31,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 6138 transitions. [2022-02-14 23:09:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-02-14 23:09:31,316 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:09:31,317 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:09:31,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-14 23:09:31,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-02-14 23:09:31,523 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:09:31,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:09:31,523 INFO L85 PathProgramCache]: Analyzing trace with hash -139286510, now seen corresponding path program 10 times [2022-02-14 23:09:31,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:09:31,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498359033] [2022-02-14 23:09:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:09:31,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:09:31,533 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:09:31,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001888666] [2022-02-14 23:09:31,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 23:09:31,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:09:31,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:09:31,535 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:09:31,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-14 23:09:31,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 23:09:31,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:09:31,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 23:09:31,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:09:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 98 proven. 148 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-02-14 23:09:32,194 INFO L328 TraceCheckSpWp]: Computing backward predicates...