/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 18:09:16,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 18:09:16,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 18:09:17,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 18:09:17,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 18:09:17,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 18:09:17,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 18:09:17,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 18:09:17,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 18:09:17,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 18:09:17,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 18:09:17,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 18:09:17,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 18:09:17,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 18:09:17,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 18:09:17,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 18:09:17,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 18:09:17,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 18:09:17,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 18:09:17,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 18:09:17,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 18:09:17,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 18:09:17,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 18:09:17,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 18:09:17,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 18:09:17,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 18:09:17,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 18:09:17,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 18:09:17,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 18:09:17,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-23 18:09:17,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 18:09:17,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 18:09:17,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 18:09:17,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 18:09:17,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 18:09:17,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 18:09:17,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 18:09:17,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 18:09:17,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 18:09:17,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 18:09:17,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 18:09:17,039 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 18:09:17,044 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 18:09:17,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 18:09:17,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 18:09:17,046 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 18:09:17,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 18:09:17,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 18:09:17,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 18:09:17,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 18:09:17,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 18:09:17,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 18:09:17,046 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 18:09:17,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 18:09:17,046 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 18:09:17,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 18:09:17,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 18:09:17,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 18:09:17,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 18:09:17,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 18:09:17,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:09:17,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 18:09:17,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 18:09:17,048 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 18:09:17,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 18:09:17,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 18:09:17,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 18:09:17,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 18:09:17,243 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 18:09:17,244 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 18:09:17,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-02-23 18:09:17,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13e4d2036/2daef25c3aba4cee981a766aedbb2686/FLAGf3a32b9bc [2022-02-23 18:09:17,630 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 18:09:17,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-02-23 18:09:17,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13e4d2036/2daef25c3aba4cee981a766aedbb2686/FLAGf3a32b9bc [2022-02-23 18:09:18,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13e4d2036/2daef25c3aba4cee981a766aedbb2686 [2022-02-23 18:09:18,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 18:09:18,068 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 18:09:18,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 18:09:18,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 18:09:18,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 18:09:18,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:09:18" (1/1) ... [2022-02-23 18:09:18,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e48b936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:18, skipping insertion in model container [2022-02-23 18:09:18,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:09:18" (1/1) ... [2022-02-23 18:09:18,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 18:09:18,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 18:09:18,205 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2022-02-23 18:09:18,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:09:18,238 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 18:09:18,245 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2022-02-23 18:09:18,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:09:18,260 INFO L208 MainTranslator]: Completed translation [2022-02-23 18:09:18,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:18 WrapperNode [2022-02-23 18:09:18,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 18:09:18,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 18:09:18,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 18:09:18,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 18:09:18,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:18" (1/1) ... [2022-02-23 18:09:18,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:18" (1/1) ... [2022-02-23 18:09:18,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:18" (1/1) ... [2022-02-23 18:09:18,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:18" (1/1) ... [2022-02-23 18:09:18,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:18" (1/1) ... [2022-02-23 18:09:18,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:18" (1/1) ... [2022-02-23 18:09:18,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:18" (1/1) ... [2022-02-23 18:09:18,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 18:09:18,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 18:09:18,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 18:09:18,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 18:09:18,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:18" (1/1) ... [2022-02-23 18:09:18,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:09:18,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:18,326 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) [2022-02-23 18:09:18,343 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 [2022-02-23 18:09:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 18:09:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 18:09:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 18:09:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 18:09:18,355 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 18:09:18,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 18:09:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 18:09:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 18:09:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 18:09:18,399 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 18:09:18,400 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 18:09:18,512 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 18:09:18,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 18:09:18,516 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 18:09:18,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:09:18 BoogieIcfgContainer [2022-02-23 18:09:18,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 18:09:18,518 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 18:09:18,518 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 18:09:18,519 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 18:09:18,521 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:09:18" (1/1) ... [2022-02-23 18:09:18,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:09:18 BasicIcfg [2022-02-23 18:09:18,533 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 18:09:18,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 18:09:18,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 18:09:18,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 18:09:18,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:09:18" (1/4) ... [2022-02-23 18:09:18,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d05e21f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:09:18, skipping insertion in model container [2022-02-23 18:09:18,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:18" (2/4) ... [2022-02-23 18:09:18,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d05e21f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:09:18, skipping insertion in model container [2022-02-23 18:09:18,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:09:18" (3/4) ... [2022-02-23 18:09:18,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d05e21f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:09:18, skipping insertion in model container [2022-02-23 18:09:18,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:09:18" (4/4) ... [2022-02-23 18:09:18,538 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.cJordan [2022-02-23 18:09:18,541 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 18:09:18,541 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 18:09:18,568 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 18:09:18,574 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 [2022-02-23 18:09:18,574 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 18:09:18,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 18:09:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-23 18:09:18,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:18,611 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:18,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:18,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-02-23 18:09:18,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:18,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114753206] [2022-02-23 18:09:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:18,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:18,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:09:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:18,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 18:09:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:18,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 18:09:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:18,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 18:09:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 18:09:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:18,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-23 18:09:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:18,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-23 18:09:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 18:09:18,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:18,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114753206] [2022-02-23 18:09:18,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114753206] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:09:18,808 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:09:18,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 18:09:18,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316117443] [2022-02-23 18:09:18,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:18,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 18:09:18,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 18:09:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:09:18,836 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:09:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:18,911 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-02-23 18:09:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 18:09:18,913 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-02-23 18:09:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:18,918 INFO L225 Difference]: With dead ends: 40 [2022-02-23 18:09:18,918 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 18:09:18,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:09:18,927 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:18,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 18:09:18,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 18:09:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 18:09:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-02-23 18:09:18,963 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-02-23 18:09:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:18,964 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-02-23 18:09:18,964 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:09:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-02-23 18:09:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 18:09:18,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:18,966 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:18,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 18:09:18,968 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:18,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-02-23 18:09:18,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:18,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137163635] [2022-02-23 18:09:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:18,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:18,996 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:18,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866700281] [2022-02-23 18:09:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:18,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:18,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:19,012 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) [2022-02-23 18:09:19,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 18:09:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:19,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:09:19,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 18:09:19,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 18:09:19,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:19,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137163635] [2022-02-23 18:09:19,293 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:19,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866700281] [2022-02-23 18:09:19,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866700281] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:19,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:19,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-02-23 18:09:19,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103096426] [2022-02-23 18:09:19,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:19,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 18:09:19,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 18:09:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-23 18:09:19,296 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:09:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:19,348 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-02-23 18:09:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:09:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-02-23 18:09:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:19,350 INFO L225 Difference]: With dead ends: 44 [2022-02-23 18:09:19,350 INFO L226 Difference]: Without dead ends: 44 [2022-02-23 18:09:19,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:09:19,351 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:19,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 124 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-23 18:09:19,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-02-23 18:09:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 18:09:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-02-23 18:09:19,357 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-02-23 18:09:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:19,357 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-02-23 18:09:19,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:09:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-02-23 18:09:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 18:09:19,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:19,358 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:19,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:19,588 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 [2022-02-23 18:09:19,589 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:19,589 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-02-23 18:09:19,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:19,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444436720] [2022-02-23 18:09:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:19,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:19,623 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:19,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840093820] [2022-02-23 18:09:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:19,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:19,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:19,627 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) [2022-02-23 18:09:19,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 18:09:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:19,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 18:09:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 18:09:19,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 18:09:19,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:19,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444436720] [2022-02-23 18:09:19,949 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:19,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840093820] [2022-02-23 18:09:19,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840093820] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:09:19,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:09:19,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-23 18:09:19,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606684365] [2022-02-23 18:09:19,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:19,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:09:19,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:19,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:09:19,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:09:19,951 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-23 18:09:19,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:19,990 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-02-23 18:09:19,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:09:19,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-02-23 18:09:19,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:19,992 INFO L225 Difference]: With dead ends: 41 [2022-02-23 18:09:19,992 INFO L226 Difference]: Without dead ends: 41 [2022-02-23 18:09:19,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:19,993 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:19,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-23 18:09:19,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-23 18:09:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 18:09:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-02-23 18:09:19,997 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-02-23 18:09:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:19,998 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-02-23 18:09:19,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-23 18:09:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-02-23 18:09:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 18:09:19,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:19,999 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-02-23 18:09:20,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:20,230 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 [2022-02-23 18:09:20,231 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:20,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:20,231 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-02-23 18:09:20,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:20,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541941751] [2022-02-23 18:09:20,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:20,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:20,241 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:20,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282656576] [2022-02-23 18:09:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:20,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:20,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:20,262 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) [2022-02-23 18:09:20,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 18:09:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:20,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 18:09:20,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 18:09:20,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:20,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:20,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541941751] [2022-02-23 18:09:20,570 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:20,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282656576] [2022-02-23 18:09:20,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282656576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:09:20,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:09:20,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-02-23 18:09:20,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337319061] [2022-02-23 18:09:20,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:20,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:09:20,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:09:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:20,572 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:09:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:20,713 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-02-23 18:09:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:09:20,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-02-23 18:09:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:20,714 INFO L225 Difference]: With dead ends: 52 [2022-02-23 18:09:20,714 INFO L226 Difference]: Without dead ends: 52 [2022-02-23 18:09:20,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:09:20,715 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:20,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-23 18:09:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-02-23 18:09:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 18:09:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-02-23 18:09:20,724 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-02-23 18:09:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:20,725 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-02-23 18:09:20,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:09:20,725 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-02-23 18:09:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 18:09:20,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:20,726 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2022-02-23 18:09:20,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:20,927 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 [2022-02-23 18:09:20,927 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:20,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:20,927 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-02-23 18:09:20,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:20,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913970493] [2022-02-23 18:09:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:20,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:20,938 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:20,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539010444] [2022-02-23 18:09:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:20,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:20,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:20,963 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) [2022-02-23 18:09:20,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 18:09:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 18:09:21,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 18:09:21,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-02-23 18:09:21,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:21,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913970493] [2022-02-23 18:09:21,410 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:21,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539010444] [2022-02-23 18:09:21,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539010444] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:09:21,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:09:21,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-23 18:09:21,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087788210] [2022-02-23 18:09:21,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:21,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:09:21,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:09:21,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:09:21,412 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-23 18:09:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:21,449 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-02-23 18:09:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:09:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-02-23 18:09:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:21,450 INFO L225 Difference]: With dead ends: 56 [2022-02-23 18:09:21,450 INFO L226 Difference]: Without dead ends: 56 [2022-02-23 18:09:21,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:21,451 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:21,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-23 18:09:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-02-23 18:09:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 18:09:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-02-23 18:09:21,456 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-02-23 18:09:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:21,457 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-02-23 18:09:21,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-23 18:09:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-02-23 18:09:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-23 18:09:21,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:21,458 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2022-02-23 18:09:21,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:21,670 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 [2022-02-23 18:09:21,671 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:21,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:21,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-02-23 18:09:21,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:21,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274391071] [2022-02-23 18:09:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:21,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:21,680 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:21,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125340362] [2022-02-23 18:09:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:21,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:21,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:21,682 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) [2022-02-23 18:09:21,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 18:09:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 18:09:21,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-02-23 18:09:21,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:22,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:22,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274391071] [2022-02-23 18:09:22,083 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:22,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125340362] [2022-02-23 18:09:22,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125340362] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:09:22,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:09:22,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-23 18:09:22,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994248844] [2022-02-23 18:09:22,084 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:22,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 18:09:22,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 18:09:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:09:22,085 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-23 18:09:22,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:22,200 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-02-23 18:09:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 18:09:22,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-02-23 18:09:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:22,202 INFO L225 Difference]: With dead ends: 60 [2022-02-23 18:09:22,202 INFO L226 Difference]: Without dead ends: 60 [2022-02-23 18:09:22,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:22,205 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:22,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-23 18:09:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-02-23 18:09:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 18:09:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-02-23 18:09:22,212 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-02-23 18:09:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:22,213 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-02-23 18:09:22,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-23 18:09:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-02-23 18:09:22,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-23 18:09:22,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:22,214 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:22,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:22,417 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 [2022-02-23 18:09:22,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-02-23 18:09:22,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:22,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538306556] [2022-02-23 18:09:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:22,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:22,430 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:22,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168183667] [2022-02-23 18:09:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:22,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:22,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:22,431 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) [2022-02-23 18:09:22,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 18:09:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:22,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:09:22,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-02-23 18:09:22,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-02-23 18:09:22,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:22,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538306556] [2022-02-23 18:09:22,681 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:22,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168183667] [2022-02-23 18:09:22,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168183667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:22,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:22,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 18:09:22,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891084716] [2022-02-23 18:09:22,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:22,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:09:22,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:22,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:09:22,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:09:22,683 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-02-23 18:09:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:22,789 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-23 18:09:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:09:22,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-02-23 18:09:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:22,792 INFO L225 Difference]: With dead ends: 98 [2022-02-23 18:09:22,792 INFO L226 Difference]: Without dead ends: 98 [2022-02-23 18:09:22,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:09:22,792 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:22,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 281 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-23 18:09:22,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-02-23 18:09:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-23 18:09:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-02-23 18:09:22,799 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-02-23 18:09:22,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:22,799 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-02-23 18:09:22,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-02-23 18:09:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-02-23 18:09:22,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-23 18:09:22,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:22,801 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1] [2022-02-23 18:09:22,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:23,017 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 [2022-02-23 18:09:23,017 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-02-23 18:09:23,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:23,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875802771] [2022-02-23 18:09:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:23,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:23,026 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:23,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822302988] [2022-02-23 18:09:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:23,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:23,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:23,028 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) [2022-02-23 18:09:23,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 18:09:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:23,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 18:09:23,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-23 18:09:23,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-23 18:09:23,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:23,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875802771] [2022-02-23 18:09:23,361 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:23,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822302988] [2022-02-23 18:09:23,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822302988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:23,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:23,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-02-23 18:09:23,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608225816] [2022-02-23 18:09:23,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:23,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 18:09:23,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 18:09:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:09:23,362 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 18:09:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:23,540 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2022-02-23 18:09:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 18:09:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-02-23 18:09:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:23,543 INFO L225 Difference]: With dead ends: 130 [2022-02-23 18:09:23,543 INFO L226 Difference]: Without dead ends: 128 [2022-02-23 18:09:23,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-23 18:09:23,544 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:23,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 329 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-23 18:09:23,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-02-23 18:09:23,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-23 18:09:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-02-23 18:09:23,551 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-02-23 18:09:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:23,551 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-02-23 18:09:23,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 18:09:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-02-23 18:09:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-23 18:09:23,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:23,552 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1] [2022-02-23 18:09:23,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:23,769 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 [2022-02-23 18:09:23,769 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:23,769 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-02-23 18:09:23,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:23,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619873885] [2022-02-23 18:09:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:23,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:23,777 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:23,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818860952] [2022-02-23 18:09:23,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:09:23,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:23,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:23,796 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) [2022-02-23 18:09:23,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 18:09:23,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:09:23,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:09:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-23 18:09:23,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-02-23 18:09:24,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-02-23 18:09:24,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:24,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619873885] [2022-02-23 18:09:24,470 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:24,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818860952] [2022-02-23 18:09:24,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818860952] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:24,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:24,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-02-23 18:09:24,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351662539] [2022-02-23 18:09:24,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:24,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 18:09:24,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:24,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 18:09:24,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-23 18:09:24,471 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-02-23 18:09:25,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:25,759 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2022-02-23 18:09:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 18:09:25,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-02-23 18:09:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:25,762 INFO L225 Difference]: With dead ends: 126 [2022-02-23 18:09:25,763 INFO L226 Difference]: Without dead ends: 126 [2022-02-23 18:09:25,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-02-23 18:09:25,763 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:25,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 330 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 18:09:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-23 18:09:25,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-02-23 18:09:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-23 18:09:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-02-23 18:09:25,769 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-02-23 18:09:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:25,769 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-02-23 18:09:25,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-02-23 18:09:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-02-23 18:09:25,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-23 18:09:25,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:25,770 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1] [2022-02-23 18:09:25,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:25,979 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 [2022-02-23 18:09:25,980 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-02-23 18:09:25,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:25,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197138245] [2022-02-23 18:09:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:25,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:26,001 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:26,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220322377] [2022-02-23 18:09:26,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:09:26,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:26,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:26,003 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) [2022-02-23 18:09:26,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 18:09:26,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 18:09:26,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:09:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-23 18:09:26,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-02-23 18:09:26,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:26,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:26,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197138245] [2022-02-23 18:09:26,496 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:26,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220322377] [2022-02-23 18:09:26,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220322377] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:09:26,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:09:26,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 18:09:26,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876022591] [2022-02-23 18:09:26,497 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:26,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:09:26,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:09:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:26,498 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-23 18:09:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:26,629 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-02-23 18:09:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:09:26,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-02-23 18:09:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:26,631 INFO L225 Difference]: With dead ends: 142 [2022-02-23 18:09:26,631 INFO L226 Difference]: Without dead ends: 142 [2022-02-23 18:09:26,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:09:26,632 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:26,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-23 18:09:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-02-23 18:09:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 18:09:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-02-23 18:09:26,638 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-02-23 18:09:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:26,638 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-02-23 18:09:26,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-23 18:09:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-02-23 18:09:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 18:09:26,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:26,639 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1] [2022-02-23 18:09:26,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:26,855 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 [2022-02-23 18:09:26,856 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-02-23 18:09:26,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:26,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148876133] [2022-02-23 18:09:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:26,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:26,864 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:26,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624946548] [2022-02-23 18:09:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:26,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:26,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:26,872 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) [2022-02-23 18:09:26,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 18:09:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-23 18:09:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-02-23 18:09:27,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-02-23 18:09:27,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:27,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148876133] [2022-02-23 18:09:27,578 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:27,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624946548] [2022-02-23 18:09:27,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624946548] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:27,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:27,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-02-23 18:09:27,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043585953] [2022-02-23 18:09:27,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:27,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 18:09:27,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:27,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 18:09:27,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:09:27,580 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 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) [2022-02-23 18:09:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:29,830 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2022-02-23 18:09:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-23 18:09:29,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 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 91 [2022-02-23 18:09:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:29,832 INFO L225 Difference]: With dead ends: 226 [2022-02-23 18:09:29,832 INFO L226 Difference]: Without dead ends: 220 [2022-02-23 18:09:29,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-02-23 18:09:29,832 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 58 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:29,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 402 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-23 18:09:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-23 18:09:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-02-23 18:09:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-02-23 18:09:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-02-23 18:09:29,841 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-02-23 18:09:29,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:29,841 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-02-23 18:09:29,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 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) [2022-02-23 18:09:29,841 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-02-23 18:09:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-23 18:09:29,842 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:29,842 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:29,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:30,075 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 [2022-02-23 18:09:30,075 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:30,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-02-23 18:09:30,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:30,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710072030] [2022-02-23 18:09:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:30,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:30,084 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:30,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511089551] [2022-02-23 18:09:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:30,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:30,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:30,085 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) [2022-02-23 18:09:30,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 18:09:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:30,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 59 conjunts are in the unsatisfiable core [2022-02-23 18:09:30,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-02-23 18:09:30,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 85 proven. 37 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-02-23 18:09:35,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:35,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710072030] [2022-02-23 18:09:35,732 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:35,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511089551] [2022-02-23 18:09:35,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511089551] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:35,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:35,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-02-23 18:09:35,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293575324] [2022-02-23 18:09:35,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:35,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 18:09:35,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:35,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 18:09:35,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=285, Unknown=1, NotChecked=0, Total=380 [2022-02-23 18:09:35,733 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 20 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 11 states have call successors, (31) [2022-02-23 18:09:41,722 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 [] [2022-02-23 18:09:43,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:09:45,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:10:12,346 WARN L232 SmtUtils]: Spent 26.18s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:10:14,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:10:18,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:10:21,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:10:23,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:10:26,768 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:10:28,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:10:30,879 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 [] [2022-02-23 18:10:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:32,092 INFO L93 Difference]: Finished difference Result 229 states and 310 transitions. [2022-02-23 18:10:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 18:10:32,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 11 states have call successors, (31) Word has length 107 [2022-02-23 18:10:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:32,094 INFO L225 Difference]: With dead ends: 229 [2022-02-23 18:10:32,095 INFO L226 Difference]: Without dead ends: 227 [2022-02-23 18:10:32,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=191, Invalid=562, Unknown=3, NotChecked=0, Total=756 [2022-02-23 18:10:32,095 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 85 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 137 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:32,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 335 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 312 Invalid, 10 Unknown, 0 Unchecked, 23.7s Time] [2022-02-23 18:10:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-23 18:10:32,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 218. [2022-02-23 18:10:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 118 states have internal predecessors, (138), 81 states have call successors, (81), 20 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-02-23 18:10:32,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 298 transitions. [2022-02-23 18:10:32,104 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 298 transitions. Word has length 107 [2022-02-23 18:10:32,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:32,104 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 298 transitions. [2022-02-23 18:10:32,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 11 states have call successors, (31) [2022-02-23 18:10:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 298 transitions. [2022-02-23 18:10:32,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-23 18:10:32,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:32,105 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:32,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:32,338 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 [2022-02-23 18:10:32,338 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1614224774, now seen corresponding path program 2 times [2022-02-23 18:10:32,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:32,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213529192] [2022-02-23 18:10:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:32,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:32,354 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:32,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167944399] [2022-02-23 18:10:32,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:10:32,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:32,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:32,359 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) [2022-02-23 18:10:32,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 18:10:32,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:10:32,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:10:32,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 18:10:32,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-02-23 18:10:32,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:32,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:32,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213529192] [2022-02-23 18:10:32,590 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:32,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167944399] [2022-02-23 18:10:32,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167944399] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:32,591 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:32,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:10:32,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577301937] [2022-02-23 18:10:32,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:32,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:10:32,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:32,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:10:32,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:10:32,592 INFO L87 Difference]: Start difference. First operand 218 states and 298 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-23 18:10:32,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:32,626 INFO L93 Difference]: Finished difference Result 199 states and 260 transitions. [2022-02-23 18:10:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:10:32,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2022-02-23 18:10:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:32,641 INFO L225 Difference]: With dead ends: 199 [2022-02-23 18:10:32,642 INFO L226 Difference]: Without dead ends: 199 [2022-02-23 18:10:32,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-23 18:10:32,643 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:32,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:10:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-23 18:10:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 123. [2022-02-23 18:10:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-02-23 18:10:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2022-02-23 18:10:32,659 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 116 [2022-02-23 18:10:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:32,660 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2022-02-23 18:10:32,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-02-23 18:10:32,660 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2022-02-23 18:10:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-23 18:10:32,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:32,662 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:32,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:32,875 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 [2022-02-23 18:10:32,875 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 3 times [2022-02-23 18:10:32,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:32,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541435531] [2022-02-23 18:10:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:32,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:32,892 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:32,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527888271] [2022-02-23 18:10:32,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:10:32,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:32,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:32,894 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) [2022-02-23 18:10:32,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 18:10:32,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 18:10:32,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:10:32,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 60 conjunts are in the unsatisfiable core [2022-02-23 18:10:32,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-02-23 18:10:33,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:34,036 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:10:34,039 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:10:36,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:36,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541435531] [2022-02-23 18:10:36,211 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:36,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527888271] [2022-02-23 18:10:36,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527888271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:10:36,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:10:36,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-02-23 18:10:36,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470402752] [2022-02-23 18:10:36,212 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:36,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 18:10:36,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:36,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 18:10:36,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=347, Unknown=1, NotChecked=0, Total=420 [2022-02-23 18:10:36,212 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-02-23 18:10:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:36,950 INFO L93 Difference]: Finished difference Result 196 states and 258 transitions. [2022-02-23 18:10:36,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 18:10:36,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) Word has length 138 [2022-02-23 18:10:36,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:36,952 INFO L225 Difference]: With dead ends: 196 [2022-02-23 18:10:36,952 INFO L226 Difference]: Without dead ends: 193 [2022-02-23 18:10:36,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=108, Invalid=541, Unknown=1, NotChecked=0, Total=650 [2022-02-23 18:10:36,953 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 34 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:36,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 513 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 18:10:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-02-23 18:10:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2022-02-23 18:10:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 100 states have (on average 1.13) internal successors, (113), 100 states have internal predecessors, (113), 69 states have call successors, (69), 19 states have call predecessors, (69), 17 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-02-23 18:10:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 249 transitions. [2022-02-23 18:10:36,960 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 249 transitions. Word has length 138 [2022-02-23 18:10:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:36,961 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 249 transitions. [2022-02-23 18:10:36,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-02-23 18:10:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 249 transitions. [2022-02-23 18:10:36,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-23 18:10:36,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:36,963 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:36,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:37,179 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 [2022-02-23 18:10:37,179 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1947214227, now seen corresponding path program 4 times [2022-02-23 18:10:37,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:37,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777565221] [2022-02-23 18:10:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:37,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:37,212 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:37,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300015368] [2022-02-23 18:10:37,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 18:10:37,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:37,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:37,214 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) [2022-02-23 18:10:37,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 18:10:37,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 18:10:37,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:10:37,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 52 conjunts are in the unsatisfiable core [2022-02-23 18:10:37,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 72 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-02-23 18:10:38,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 72 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-02-23 18:10:40,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:40,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777565221] [2022-02-23 18:10:40,767 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:40,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300015368] [2022-02-23 18:10:40,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300015368] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:40,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:40,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2022-02-23 18:10:40,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930615597] [2022-02-23 18:10:40,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:40,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-23 18:10:40,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:40,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-23 18:10:40,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-02-23 18:10:40,770 INFO L87 Difference]: Start difference. First operand 187 states and 249 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) [2022-02-23 18:11:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:11:13,962 INFO L93 Difference]: Finished difference Result 295 states and 414 transitions. [2022-02-23 18:11:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-23 18:11:13,962 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) Word has length 157 [2022-02-23 18:11:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:11:13,964 INFO L225 Difference]: With dead ends: 295 [2022-02-23 18:11:13,964 INFO L226 Difference]: Without dead ends: 291 [2022-02-23 18:11:13,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2022-02-23 18:11:13,965 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 92 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-02-23 18:11:13,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 878 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-02-23 18:11:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-23 18:11:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 259. [2022-02-23 18:11:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 133 states have (on average 1.150375939849624) internal successors, (153), 133 states have internal predecessors, (153), 105 states have call successors, (105), 22 states have call predecessors, (105), 20 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-02-23 18:11:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2022-02-23 18:11:13,973 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 157 [2022-02-23 18:11:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:11:13,974 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2022-02-23 18:11:13,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) [2022-02-23 18:11:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2022-02-23 18:11:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-23 18:11:13,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:13,975 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:11:13,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 18:11:14,191 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 [2022-02-23 18:11:14,192 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash 915217378, now seen corresponding path program 5 times [2022-02-23 18:11:14,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:14,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704146176] [2022-02-23 18:11:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:14,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:14,206 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:11:14,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001224127] [2022-02-23 18:11:14,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 18:11:14,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:14,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:14,215 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) [2022-02-23 18:11:14,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 18:11:14,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-02-23 18:11:14,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:11:14,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 61 conjunts are in the unsatisfiable core [2022-02-23 18:11:14,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:11:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-02-23 18:11:15,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:11:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-02-23 18:11:17,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:17,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704146176] [2022-02-23 18:11:17,374 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:11:17,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001224127] [2022-02-23 18:11:17,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001224127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:11:17,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:11:17,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-02-23 18:11:17,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576959193] [2022-02-23 18:11:17,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:11:17,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 18:11:17,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 18:11:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-23 18:11:17,375 INFO L87 Difference]: Start difference. First operand 259 states and 361 transitions. Second operand has 24 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-02-23 18:12:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:12,638 INFO L93 Difference]: Finished difference Result 424 states and 619 transitions. [2022-02-23 18:12:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-23 18:12:12,639 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) Word has length 160 [2022-02-23 18:12:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:12,640 INFO L225 Difference]: With dead ends: 424 [2022-02-23 18:12:12,641 INFO L226 Difference]: Without dead ends: 420 [2022-02-23 18:12:12,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=874, Invalid=3818, Unknown=0, NotChecked=0, Total=4692 [2022-02-23 18:12:12,642 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 128 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:12,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1353 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 31.3s Time] [2022-02-23 18:12:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-02-23 18:12:12,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 343. [2022-02-23 18:12:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 170 states have (on average 1.1705882352941177) internal successors, (199), 170 states have internal predecessors, (199), 149 states have call successors, (149), 25 states have call predecessors, (149), 23 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-02-23 18:12:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2022-02-23 18:12:12,655 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 160 [2022-02-23 18:12:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:12,655 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2022-02-23 18:12:12,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-02-23 18:12:12,655 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2022-02-23 18:12:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-23 18:12:12,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:12,657 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:12:12,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:12,880 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 [2022-02-23 18:12:12,880 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:12,880 INFO L85 PathProgramCache]: Analyzing trace with hash -970371602, now seen corresponding path program 6 times [2022-02-23 18:12:12,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:12,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892894801] [2022-02-23 18:12:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:12,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:12,888 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:12,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001558602] [2022-02-23 18:12:12,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 18:12:12,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:12,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:12,890 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) [2022-02-23 18:12:12,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 18:12:13,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-23 18:12:13,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:12:13,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 61 conjunts are in the unsatisfiable core [2022-02-23 18:12:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-02-23 18:12:14,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:12:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-02-23 18:12:17,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:17,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892894801] [2022-02-23 18:12:17,121 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:17,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001558602] [2022-02-23 18:12:17,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001558602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:12:17,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:12:17,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-02-23 18:12:17,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192542686] [2022-02-23 18:12:17,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:17,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 18:12:17,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 18:12:17,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-02-23 18:12:17,123 INFO L87 Difference]: Start difference. First operand 343 states and 495 transitions. Second operand has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-02-23 18:12:40,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:00,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:04,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:05,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:05,987 INFO L93 Difference]: Finished difference Result 515 states and 760 transitions. [2022-02-23 18:13:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-23 18:13:05,988 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) Word has length 160 [2022-02-23 18:13:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:05,990 INFO L225 Difference]: With dead ends: 515 [2022-02-23 18:13:05,990 INFO L226 Difference]: Without dead ends: 511 [2022-02-23 18:13:05,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=1108, Invalid=4592, Unknown=0, NotChecked=0, Total=5700 [2022-02-23 18:13:05,992 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 129 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:05,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 956 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 24.9s Time] [2022-02-23 18:13:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-02-23 18:13:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 443. [2022-02-23 18:13:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 218 states have (on average 1.1697247706422018) internal successors, (255), 218 states have internal predecessors, (255), 197 states have call successors, (197), 29 states have call predecessors, (197), 27 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2022-02-23 18:13:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 647 transitions. [2022-02-23 18:13:06,003 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 647 transitions. Word has length 160 [2022-02-23 18:13:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:06,004 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 647 transitions. [2022-02-23 18:13:06,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-02-23 18:13:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 647 transitions. [2022-02-23 18:13:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-02-23 18:13:06,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:06,006 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 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, 1, 1] [2022-02-23 18:13:06,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:06,206 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 [2022-02-23 18:13:06,207 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:06,207 INFO L85 PathProgramCache]: Analyzing trace with hash -74761106, now seen corresponding path program 7 times [2022-02-23 18:13:06,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:06,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780578818] [2022-02-23 18:13:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:06,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:06,214 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:06,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638535824] [2022-02-23 18:13:06,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 18:13:06,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:06,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:06,244 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) [2022-02-23 18:13:06,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 18:13:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:06,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 123 conjunts are in the unsatisfiable core [2022-02-23 18:13:06,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 300 proven. 369 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-02-23 18:13:08,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 385 proven. 38 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2022-02-23 18:13:16,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:16,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780578818] [2022-02-23 18:13:16,283 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:16,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638535824] [2022-02-23 18:13:16,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638535824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:13:16,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:13:16,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 29 [2022-02-23 18:13:16,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308144227] [2022-02-23 18:13:16,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:13:16,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-23 18:13:16,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:16,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-23 18:13:16,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=652, Unknown=1, NotChecked=0, Total=812 [2022-02-23 18:13:16,285 INFO L87 Difference]: Start difference. First operand 443 states and 647 transitions. Second operand has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 18 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (51), 16 states have call predecessors, (51), 16 states have call successors, (51) [2022-02-23 18:13:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:34,799 INFO L93 Difference]: Finished difference Result 535 states and 777 transitions. [2022-02-23 18:13:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-23 18:13:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 18 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (51), 16 states have call predecessors, (51), 16 states have call successors, (51) Word has length 204 [2022-02-23 18:13:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:34,800 INFO L225 Difference]: With dead ends: 535 [2022-02-23 18:13:34,800 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 18:13:34,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 374 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=483, Invalid=1772, Unknown=1, NotChecked=0, Total=2256 [2022-02-23 18:13:34,801 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 77 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:34,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 855 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-23 18:13:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 18:13:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 18:13:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 18:13:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 18:13:34,802 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2022-02-23 18:13:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:34,803 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 18:13:34,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 18 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (51), 16 states have call predecessors, (51), 16 states have call successors, (51) [2022-02-23 18:13:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 18:13:34,803 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 18:13:34,805 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 18:13:34,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:35,006 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 [2022-02-23 18:13:35,011 INFO L732 BasicCegarLoop]: Path program histogram: [7, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:35,012 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 18:13:35,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:13:35 BasicIcfg [2022-02-23 18:13:35,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 18:13:35,015 INFO L158 Benchmark]: Toolchain (without parser) took 256946.73ms. Allocated memory was 170.9MB in the beginning and 298.8MB in the end (delta: 127.9MB). Free memory was 115.7MB in the beginning and 182.0MB in the end (delta: -66.3MB). Peak memory consumption was 62.3MB. Max. memory is 8.0GB. [2022-02-23 18:13:35,015 INFO L158 Benchmark]: CDTParser took 0.60ms. Allocated memory is still 170.9MB. Free memory was 132.2MB in the beginning and 132.1MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 18:13:35,015 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.20ms. Allocated memory is still 170.9MB. Free memory was 115.6MB in the beginning and 141.8MB in the end (delta: -26.2MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. [2022-02-23 18:13:35,015 INFO L158 Benchmark]: Boogie Preprocessor took 22.25ms. Allocated memory is still 170.9MB. Free memory was 141.8MB in the beginning and 140.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 18:13:35,016 INFO L158 Benchmark]: RCFGBuilder took 234.03ms. Allocated memory is still 170.9MB. Free memory was 140.4MB in the beginning and 128.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 18:13:35,016 INFO L158 Benchmark]: IcfgTransformer took 14.83ms. Allocated memory is still 170.9MB. Free memory was 128.9MB in the beginning and 127.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 18:13:35,016 INFO L158 Benchmark]: TraceAbstraction took 256480.42ms. Allocated memory was 170.9MB in the beginning and 298.8MB in the end (delta: 127.9MB). Free memory was 126.8MB in the beginning and 182.0MB in the end (delta: -55.3MB). Peak memory consumption was 73.8MB. Max. memory is 8.0GB. [2022-02-23 18:13:35,017 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60ms. Allocated memory is still 170.9MB. Free memory was 132.2MB in the beginning and 132.1MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 184.20ms. Allocated memory is still 170.9MB. Free memory was 115.6MB in the beginning and 141.8MB in the end (delta: -26.2MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.25ms. Allocated memory is still 170.9MB. Free memory was 141.8MB in the beginning and 140.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 234.03ms. Allocated memory is still 170.9MB. Free memory was 140.4MB in the beginning and 128.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 14.83ms. Allocated memory is still 170.9MB. Free memory was 128.9MB in the beginning and 127.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 256480.42ms. Allocated memory was 170.9MB in the beginning and 298.8MB in the end (delta: 127.9MB). Free memory was 126.8MB in the beginning and 182.0MB in the end (delta: -55.3MB). Peak memory consumption was 73.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 256.4s, OverallIterations: 18, TraceHistogramMax: 29, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 217.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 936 SdHoareTripleChecker+Valid, 99.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 819 mSDsluCounter, 7471 SdHoareTripleChecker+Invalid, 98.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6407 mSDsCounter, 1891 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8365 IncrementalHoareTripleChecker+Invalid, 10266 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1891 mSolverCounterUnsat, 1064 mSDtfsCounter, 8365 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3199 GetRequests, 2749 SyntacticMatches, 24 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 134.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=443occurred in iteration=17, InterpolantAutomatonStates: 313, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 344 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 33.1s InterpolantComputationTime, 1739 NumberOfCodeBlocks, 1650 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 2956 ConstructedInterpolants, 0 QuantifiedInterpolants, 20196 SizeOfPredicates, 124 NumberOfNonLiveVariables, 4055 ConjunctsInSsa, 636 ConjunctsInUnsatCore, 30 InterpolantComputations, 4 PerfectInterpolantSequences, 11437/12529 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-23 18:13:35,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...