/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 06:50:49,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 06:50:49,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 06:50:49,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 06:50:49,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 06:50:49,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 06:50:49,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 06:50:49,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 06:50:49,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 06:50:49,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 06:50:49,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 06:50:49,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 06:50:49,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 06:50:49,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 06:50:49,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 06:50:49,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 06:50:49,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 06:50:49,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 06:50:49,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 06:50:49,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 06:50:49,955 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 06:50:49,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 06:50:49,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 06:50:49,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 06:50:49,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 06:50:49,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 06:50:49,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 06:50:49,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 06:50:49,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 06:50:49,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 06:50:50,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 06:50:50,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 06:50:50,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 06:50:50,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 06:50:50,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 06:50:50,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 06:50:50,018 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 06:50:50,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 06:50:50,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 06:50:50,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 06:50:50,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 06:50:50,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 06:50:50,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 06:50:50,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 06:50:50,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 06:50:50,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 06:50:50,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 06:50:50,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 06:50:50,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 06:50:50,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:50:50,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 06:50:50,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 06:50:50,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 06:50:50,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 06:50:50,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 06:50:50,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 06:50:50,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 06:50:50,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 06:50:50,021 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 06:50:50,021 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 06:50:50,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 06:50:50,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 06:50:50,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 06:50:50,234 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 06:50:50,235 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 06:50:50,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2022-04-05 06:50:50,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b327ee47/6a334faa94904c109ab414f383d0f78f/FLAG9315f8cf7 [2022-04-05 06:50:50,661 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 06:50:50,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2022-04-05 06:50:50,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b327ee47/6a334faa94904c109ab414f383d0f78f/FLAG9315f8cf7 [2022-04-05 06:50:51,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b327ee47/6a334faa94904c109ab414f383d0f78f [2022-04-05 06:50:51,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 06:50:51,084 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 06:50:51,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 06:50:51,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 06:50:51,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 06:50:51,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:50:51" (1/1) ... [2022-04-05 06:50:51,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52d55963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:50:51, skipping insertion in model container [2022-04-05 06:50:51,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:50:51" (1/1) ... [2022-04-05 06:50:51,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 06:50:51,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 06:50:51,257 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/cohencu-ll_valuebound50.c[588,601] [2022-04-05 06:50:51,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:50:51,282 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 06:50:51,291 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/cohencu-ll_valuebound50.c[588,601] [2022-04-05 06:50:51,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:50:51,313 INFO L208 MainTranslator]: Completed translation [2022-04-05 06:50:51,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:50:51 WrapperNode [2022-04-05 06:50:51,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 06:50:51,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 06:50:51,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 06:50:51,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 06:50:51,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:50:51" (1/1) ... [2022-04-05 06:50:51,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:50:51" (1/1) ... [2022-04-05 06:50:51,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:50:51" (1/1) ... [2022-04-05 06:50:51,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:50:51" (1/1) ... [2022-04-05 06:50:51,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:50:51" (1/1) ... [2022-04-05 06:50:51,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:50:51" (1/1) ... [2022-04-05 06:50:51,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:50:51" (1/1) ... [2022-04-05 06:50:51,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 06:50:51,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 06:50:51,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 06:50:51,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 06:50:51,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:50:51" (1/1) ... [2022-04-05 06:50:51,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:50:51,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:50:51,367 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) [2022-04-05 06:50:51,377 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 [2022-04-05 06:50:51,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 06:50:51,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 06:50:51,397 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 06:50:51,398 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 06:50:51,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 06:50:51,398 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 06:50:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 06:50:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 06:50:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 06:50:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 06:50:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-04-05 06:50:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 06:50:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 06:50:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 06:50:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 06:50:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 06:50:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 06:50:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 06:50:51,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 06:50:51,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 06:50:51,452 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 06:50:51,453 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 06:50:51,593 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 06:50:51,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 06:50:51,599 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 06:50:51,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:50:51 BoogieIcfgContainer [2022-04-05 06:50:51,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 06:50:51,602 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 06:50:51,602 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 06:50:51,603 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 06:50:51,605 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:50:51" (1/1) ... [2022-04-05 06:50:51,607 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 06:50:51,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:50:51 BasicIcfg [2022-04-05 06:50:51,633 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 06:50:51,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 06:50:51,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 06:50:51,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 06:50:51,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 06:50:51" (1/4) ... [2022-04-05 06:50:51,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca7bcd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:50:51, skipping insertion in model container [2022-04-05 06:50:51,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:50:51" (2/4) ... [2022-04-05 06:50:51,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca7bcd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:50:51, skipping insertion in model container [2022-04-05 06:50:51,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:50:51" (3/4) ... [2022-04-05 06:50:51,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca7bcd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 06:50:51, skipping insertion in model container [2022-04-05 06:50:51,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:50:51" (4/4) ... [2022-04-05 06:50:51,650 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.cqvasr [2022-04-05 06:50:51,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 06:50:51,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 06:50:51,695 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 06:50:51,701 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 06:50:51,701 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 06:50:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2022-04-05 06:50:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 06:50:51,724 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:50:51,724 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:50:51,725 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:50:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:50:51,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2022-04-05 06:50:51,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:50:51,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552289604] [2022-04-05 06:50:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:51,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:50:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:51,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:50:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:51,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 06:50:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:50:51,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:50:51,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552289604] [2022-04-05 06:50:51,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552289604] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:50:51,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:50:51,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 06:50:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062162221] [2022-04-05 06:50:51,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:50:51,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 06:50:51,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:50:51,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 06:50:51,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 06:50:51,983 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 06:50:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:50:52,070 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2022-04-05 06:50:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 06:50:52,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 06:50:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:50:52,079 INFO L225 Difference]: With dead ends: 63 [2022-04-05 06:50:52,080 INFO L226 Difference]: Without dead ends: 31 [2022-04-05 06:50:52,083 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 06:50:52,086 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 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 [2022-04-05 06:50:52,087 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:50:52,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-05 06:50:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-05 06:50:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 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) [2022-04-05 06:50:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-04-05 06:50:52,119 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-04-05 06:50:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:50:52,119 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-04-05 06:50:52,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 06:50:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-04-05 06:50:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 06:50:52,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:50:52,120 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:50:52,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 06:50:52,121 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:50:52,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:50:52,122 INFO L85 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2022-04-05 06:50:52,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:50:52,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743632143] [2022-04-05 06:50:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:52,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:50:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:52,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:50:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:52,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 06:50:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:50:52,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:50:52,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743632143] [2022-04-05 06:50:52,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743632143] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:50:52,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:50:52,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 06:50:52,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905572758] [2022-04-05 06:50:52,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:50:52,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 06:50:52,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:50:52,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 06:50:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:50:52,317 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 06:50:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:50:52,534 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-04-05 06:50:52,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 06:50:52,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 06:50:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:50:52,537 INFO L225 Difference]: With dead ends: 37 [2022-04-05 06:50:52,538 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 06:50:52,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:50:52,546 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:50:52,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:50:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 06:50:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 06:50:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 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) [2022-04-05 06:50:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-05 06:50:52,561 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-04-05 06:50:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:50:52,561 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-05 06:50:52,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 06:50:52,561 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-05 06:50:52,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 06:50:52,562 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:50:52,562 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:50:52,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 06:50:52,562 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:50:52,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:50:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2022-04-05 06:50:52,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:50:52,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527524198] [2022-04-05 06:50:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:52,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:50:52,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:50:52,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860912696] [2022-04-05 06:50:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:52,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:52,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:50:52,583 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) [2022-04-05 06:50:52,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 06:50:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:52,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 06:50:52,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:50:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:50:52,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:50:52,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:50:52,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527524198] [2022-04-05 06:50:52,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:50:52,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860912696] [2022-04-05 06:50:52,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860912696] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:50:52,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:50:52,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 06:50:52,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364119843] [2022-04-05 06:50:52,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:50:52,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 06:50:52,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:50:52,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 06:50:52,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:50:52,738 INFO L87 Difference]: Start difference. First operand 35 states and 44 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:50:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:50:52,809 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-04-05 06:50:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 06:50:52,810 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-05 06:50:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:50:52,812 INFO L225 Difference]: With dead ends: 54 [2022-04-05 06:50:52,812 INFO L226 Difference]: Without dead ends: 52 [2022-04-05 06:50:52,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:50:52,815 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:50:52,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 148 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:50:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-05 06:50:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-04-05 06:50:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 06:50:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-04-05 06:50:52,839 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-04-05 06:50:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:50:52,840 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-04-05 06:50:52,840 INFO L479 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:50:52,840 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-04-05 06:50:52,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 06:50:52,841 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:50:52,841 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:50:52,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 06:50:53,065 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:53,066 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:50:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:50:53,066 INFO L85 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2022-04-05 06:50:53,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:50:53,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886726703] [2022-04-05 06:50:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:53,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:50:53,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:50:53,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512743315] [2022-04-05 06:50:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:53,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:53,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:50:53,084 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) [2022-04-05 06:50:53,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 06:50:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:53,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 06:50:53,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:50:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:50:53,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:50:53,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:50:53,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886726703] [2022-04-05 06:50:53,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:50:53,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512743315] [2022-04-05 06:50:53,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512743315] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:50:53,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:50:53,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 06:50:53,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536262796] [2022-04-05 06:50:53,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:50:53,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 06:50:53,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:50:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 06:50:53,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:50:53,234 INFO L87 Difference]: Start difference. First operand 42 states and 52 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:50:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:50:53,297 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-04-05 06:50:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 06:50:53,297 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-04-05 06:50:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:50:53,299 INFO L225 Difference]: With dead ends: 58 [2022-04-05 06:50:53,299 INFO L226 Difference]: Without dead ends: 56 [2022-04-05 06:50:53,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:50:53,301 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:50:53,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 149 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:50:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-05 06:50:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-04-05 06:50:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 06:50:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-04-05 06:50:53,325 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-04-05 06:50:53,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:50:53,325 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-04-05 06:50:53,325 INFO L479 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:50:53,325 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-04-05 06:50:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 06:50:53,327 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:50:53,331 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-05 06:50:53,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 06:50:53,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-05 06:50:53,550 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:50:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:50:53,550 INFO L85 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2022-04-05 06:50:53,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:50:53,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196632298] [2022-04-05 06:50:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:53,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:50:53,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:50:53,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455589640] [2022-04-05 06:50:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:53,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:53,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:50:53,568 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) [2022-04-05 06:50:53,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 06:50:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:53,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 06:50:53,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:50:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:50:53,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:50:53,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:50:53,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196632298] [2022-04-05 06:50:53,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:50:53,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455589640] [2022-04-05 06:50:53,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455589640] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:50:53,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:50:53,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 06:50:53,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222878790] [2022-04-05 06:50:53,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:50:53,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 06:50:53,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:50:53,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 06:50:53,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:50:53,722 INFO L87 Difference]: Start difference. First operand 52 states and 67 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 06:50:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:50:53,819 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-04-05 06:50:53,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 06:50:53,819 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-05 06:50:53,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:50:53,820 INFO L225 Difference]: With dead ends: 66 [2022-04-05 06:50:53,820 INFO L226 Difference]: Without dead ends: 54 [2022-04-05 06:50:53,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:50:53,821 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:50:53,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:50:53,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-05 06:50:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-05 06:50:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 06:50:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-04-05 06:50:53,830 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-04-05 06:50:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:50:53,830 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-04-05 06:50:53,830 INFO L479 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 06:50:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-04-05 06:50:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 06:50:53,831 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:50:53,832 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:50:53,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 06:50:54,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:54,057 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:50:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:50:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2022-04-05 06:50:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:50:54,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198221093] [2022-04-05 06:50:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:54,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:50:54,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:50:54,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319663125] [2022-04-05 06:50:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:54,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:54,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:50:54,072 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) [2022-04-05 06:50:54,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 06:50:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:54,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 06:50:54,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:50:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 06:50:54,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:50:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 06:50:54,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:50:54,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198221093] [2022-04-05 06:50:54,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:50:54,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319663125] [2022-04-05 06:50:54,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319663125] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:50:54,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:50:54,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-05 06:50:54,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099419760] [2022-04-05 06:50:54,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:50:54,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 06:50:54,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:50:54,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 06:50:54,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-05 06:50:54,383 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 06:50:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:50:54,710 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2022-04-05 06:50:54,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 06:50:54,711 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-04-05 06:50:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:50:54,713 INFO L225 Difference]: With dead ends: 77 [2022-04-05 06:50:54,713 INFO L226 Difference]: Without dead ends: 75 [2022-04-05 06:50:54,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-04-05 06:50:54,714 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:50:54,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 157 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:50:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-05 06:50:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2022-04-05 06:50:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 06:50:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-04-05 06:50:54,727 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 49 [2022-04-05 06:50:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:50:54,727 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-04-05 06:50:54,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 06:50:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-04-05 06:50:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-05 06:50:54,728 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:50:54,728 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:50:54,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 06:50:54,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:54,935 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:50:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:50:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2022-04-05 06:50:54,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:50:54,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835699411] [2022-04-05 06:50:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:54,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:50:54,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:50:54,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137753088] [2022-04-05 06:50:54,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:50:54,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:54,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:50:54,946 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) [2022-04-05 06:50:54,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 06:50:54,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:50:54,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:50:54,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 06:50:54,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:50:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 06:50:55,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:50:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 06:50:55,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:50:55,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835699411] [2022-04-05 06:50:55,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:50:55,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137753088] [2022-04-05 06:50:55,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137753088] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:50:55,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:50:55,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-05 06:50:55,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453927666] [2022-04-05 06:50:55,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:50:55,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 06:50:55,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:50:55,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 06:50:55,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-05 06:50:55,264 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-05 06:50:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:50:55,388 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-04-05 06:50:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 06:50:55,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 54 [2022-04-05 06:50:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:50:55,389 INFO L225 Difference]: With dead ends: 81 [2022-04-05 06:50:55,390 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 06:50:55,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-05 06:50:55,391 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:50:55,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 197 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:50:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 06:50:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-04-05 06:50:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-05 06:50:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-04-05 06:50:55,411 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 54 [2022-04-05 06:50:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:50:55,411 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-04-05 06:50:55,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-05 06:50:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-04-05 06:50:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 06:50:55,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:50:55,417 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:50:55,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 06:50:55,630 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:55,631 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:50:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:50:55,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2022-04-05 06:50:55,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:50:55,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775639588] [2022-04-05 06:50:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:55,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:50:55,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:50:55,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605664511] [2022-04-05 06:50:55,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:50:55,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:55,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:50:55,652 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) [2022-04-05 06:50:55,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 06:50:55,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-05 06:50:55,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:50:55,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 06:50:55,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:50:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-05 06:50:55,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:50:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-05 06:50:56,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:50:56,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775639588] [2022-04-05 06:50:56,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:50:56,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605664511] [2022-04-05 06:50:56,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605664511] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:50:56,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:50:56,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-05 06:50:56,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854381117] [2022-04-05 06:50:56,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:50:56,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 06:50:56,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:50:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 06:50:56,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 06:50:56,269 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-05 06:50:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:50:56,656 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2022-04-05 06:50:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 06:50:56,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 59 [2022-04-05 06:50:56,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:50:56,658 INFO L225 Difference]: With dead ends: 93 [2022-04-05 06:50:56,658 INFO L226 Difference]: Without dead ends: 85 [2022-04-05 06:50:56,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:50:56,659 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:50:56,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 135 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:50:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-05 06:50:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-04-05 06:50:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 48 states have internal predecessors, (48), 19 states have call successors, (19), 14 states have call predecessors, (19), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 06:50:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-04-05 06:50:56,671 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 59 [2022-04-05 06:50:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:50:56,671 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-04-05 06:50:56,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-05 06:50:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-04-05 06:50:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-05 06:50:56,672 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:50:56,672 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:50:56,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 06:50:56,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:56,895 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:50:56,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:50:56,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2022-04-05 06:50:56,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:50:56,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583484758] [2022-04-05 06:50:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:56,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:50:56,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:50:56,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020435027] [2022-04-05 06:50:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:56,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:56,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:50:56,909 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) [2022-04-05 06:50:56,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 06:50:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:56,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 06:50:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:50:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-05 06:50:57,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:50:57,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:50:57,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583484758] [2022-04-05 06:50:57,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:50:57,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020435027] [2022-04-05 06:50:57,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020435027] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:50:57,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 06:50:57,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-05 06:50:57,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066612686] [2022-04-05 06:50:57,500 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 06:50:57,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 06:50:57,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:50:57,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 06:50:57,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:50:57,501 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-05 06:50:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:50:57,624 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2022-04-05 06:50:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 06:50:57,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-04-05 06:50:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:50:57,628 INFO L225 Difference]: With dead ends: 95 [2022-04-05 06:50:57,628 INFO L226 Difference]: Without dead ends: 93 [2022-04-05 06:50:57,629 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-05 06:50:57,629 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:50:57,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 162 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:50:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-05 06:50:57,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-04-05 06:50:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 55 states have internal predecessors, (56), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 06:50:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-04-05 06:50:57,647 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 75 [2022-04-05 06:50:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:50:57,648 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-04-05 06:50:57,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-05 06:50:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-04-05 06:50:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-05 06:50:57,649 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:50:57,649 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:50:57,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 06:50:57,862 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:57,862 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:50:57,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:50:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2022-04-05 06:50:57,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:50:57,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260669226] [2022-04-05 06:50:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:57,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:50:57,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:50:57,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547099685] [2022-04-05 06:50:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:50:57,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:50:57,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:50:57,873 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) [2022-04-05 06:50:57,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 06:50:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:50:57,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-05 06:50:57,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:50:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 79 proven. 12 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-05 06:50:58,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:51:04,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:04,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260669226] [2022-04-05 06:51:04,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:04,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547099685] [2022-04-05 06:51:04,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547099685] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:51:04,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 06:51:04,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-05 06:51:04,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303283347] [2022-04-05 06:51:04,104 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 06:51:04,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 06:51:04,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:04,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 06:51:04,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-04-05 06:51:04,105 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 06:51:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:05,557 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2022-04-05 06:51:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 06:51:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 80 [2022-04-05 06:51:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:05,559 INFO L225 Difference]: With dead ends: 103 [2022-04-05 06:51:05,559 INFO L226 Difference]: Without dead ends: 90 [2022-04-05 06:51:05,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-04-05 06:51:05,560 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:05,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 153 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:51:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-05 06:51:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-05 06:51:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 21 states have call successors, (21), 16 states have call predecessors, (21), 15 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 06:51:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-04-05 06:51:05,572 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 80 [2022-04-05 06:51:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:05,573 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-04-05 06:51:05,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-05 06:51:05,573 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-04-05 06:51:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-05 06:51:05,574 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:05,574 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:05,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 06:51:05,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 06:51:05,799 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:05,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:05,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 4 times [2022-04-05 06:51:05,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:05,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106198093] [2022-04-05 06:51:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:05,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:05,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:05,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967130210] [2022-04-05 06:51:05,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:51:05,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:05,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:05,829 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) [2022-04-05 06:51:05,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 06:51:05,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:51:05,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:51:05,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 06:51:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-05 06:51:06,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:51:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-05 06:51:06,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:06,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106198093] [2022-04-05 06:51:06,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:06,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967130210] [2022-04-05 06:51:06,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967130210] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:51:06,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:51:06,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-05 06:51:06,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315169756] [2022-04-05 06:51:06,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:51:06,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 06:51:06,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:06,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 06:51:06,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:51:06,386 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-04-05 06:51:06,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:06,690 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2022-04-05 06:51:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 06:51:06,691 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 81 [2022-04-05 06:51:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:06,692 INFO L225 Difference]: With dead ends: 106 [2022-04-05 06:51:06,692 INFO L226 Difference]: Without dead ends: 104 [2022-04-05 06:51:06,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-05 06:51:06,693 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:06,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:51:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-05 06:51:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-04-05 06:51:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 06:51:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-04-05 06:51:06,706 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2022-04-05 06:51:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:06,706 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-04-05 06:51:06,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-04-05 06:51:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-04-05 06:51:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-05 06:51:06,707 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:06,707 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:06,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 06:51:06,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:06,923 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:06,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:06,924 INFO L85 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2022-04-05 06:51:06,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:06,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30426375] [2022-04-05 06:51:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:06,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:06,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965330927] [2022-04-05 06:51:06,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:51:06,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:06,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:06,938 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) [2022-04-05 06:51:06,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 06:51:06,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:51:06,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:51:06,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 06:51:07,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-05 06:51:07,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:51:07,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30426375] [2022-04-05 06:51:07,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:07,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965330927] [2022-04-05 06:51:07,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965330927] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:51:07,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 06:51:07,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-05 06:51:07,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136132500] [2022-04-05 06:51:07,542 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 06:51:07,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 06:51:07,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 06:51:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-05 06:51:07,543 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-05 06:51:07,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:07,708 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2022-04-05 06:51:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 06:51:07,708 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2022-04-05 06:51:07,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:07,711 INFO L225 Difference]: With dead ends: 118 [2022-04-05 06:51:07,711 INFO L226 Difference]: Without dead ends: 116 [2022-04-05 06:51:07,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-05 06:51:07,712 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:07,712 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 198 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:51:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-05 06:51:07,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-04-05 06:51:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-05 06:51:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2022-04-05 06:51:07,729 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 102 [2022-04-05 06:51:07,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:07,730 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2022-04-05 06:51:07,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-05 06:51:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2022-04-05 06:51:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-05 06:51:07,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:07,731 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:07,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 06:51:07,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 06:51:07,947 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2022-04-05 06:51:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:07,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479742931] [2022-04-05 06:51:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:07,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:07,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149288693] [2022-04-05 06:51:07,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:51:07,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:07,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:07,961 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) [2022-04-05 06:51:07,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 06:51:08,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:51:08,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:51:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 06:51:08,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-05 06:51:08,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:51:08,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:08,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479742931] [2022-04-05 06:51:08,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:08,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149288693] [2022-04-05 06:51:08,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149288693] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:51:08,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 06:51:08,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-05 06:51:08,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920652259] [2022-04-05 06:51:08,510 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 06:51:08,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 06:51:08,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:08,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 06:51:08,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-05 06:51:08,511 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-05 06:51:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:08,731 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-04-05 06:51:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 06:51:08,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2022-04-05 06:51:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:08,736 INFO L225 Difference]: With dead ends: 126 [2022-04-05 06:51:08,736 INFO L226 Difference]: Without dead ends: 113 [2022-04-05 06:51:08,736 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-05 06:51:08,737 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:08,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 207 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:51:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-05 06:51:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-04-05 06:51:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 26 states have call successors, (26), 20 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-05 06:51:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2022-04-05 06:51:08,754 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 107 [2022-04-05 06:51:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:08,754 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2022-04-05 06:51:08,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-05 06:51:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2022-04-05 06:51:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-05 06:51:08,758 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:08,758 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:08,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 06:51:08,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 06:51:08,980 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:08,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:08,980 INFO L85 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2022-04-05 06:51:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:08,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666672157] [2022-04-05 06:51:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:08,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:08,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:08,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035563809] [2022-04-05 06:51:08,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:51:08,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:08,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:08,997 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) [2022-04-05 06:51:08,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 06:51:09,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 06:51:09,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:51:09,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 06:51:09,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-04-05 06:51:09,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:51:10,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:10,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666672157] [2022-04-05 06:51:10,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:10,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035563809] [2022-04-05 06:51:10,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035563809] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:51:10,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 06:51:10,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-05 06:51:10,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121160937] [2022-04-05 06:51:10,118 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 06:51:10,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 06:51:10,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:10,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 06:51:10,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-04-05 06:51:10,119 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-05 06:51:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:11,597 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2022-04-05 06:51:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 06:51:11,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 129 [2022-04-05 06:51:11,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:11,598 INFO L225 Difference]: With dead ends: 119 [2022-04-05 06:51:11,599 INFO L226 Difference]: Without dead ends: 115 [2022-04-05 06:51:11,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-05 06:51:11,599 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:11,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 97 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-05 06:51:11,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-05 06:51:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-04-05 06:51:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 26 states have call successors, (26), 21 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-05 06:51:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2022-04-05 06:51:11,615 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 129 [2022-04-05 06:51:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:11,616 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2022-04-05 06:51:11,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-05 06:51:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2022-04-05 06:51:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-05 06:51:11,617 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:11,617 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:11,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 06:51:11,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 06:51:11,823 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2022-04-05 06:51:11,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:11,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392944860] [2022-04-05 06:51:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:11,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:11,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:11,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018634957] [2022-04-05 06:51:11,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:51:11,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:11,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:11,851 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) [2022-04-05 06:51:11,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 06:51:12,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 06:51:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:51:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-05 06:51:12,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:52:03,564 WARN L232 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 46 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 06:52:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 259 proven. 76 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-04-05 06:52:03,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:52:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 204 proven. 34 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-04-05 06:52:07,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:52:07,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392944860] [2022-04-05 06:52:07,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:52:07,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018634957] [2022-04-05 06:52:07,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018634957] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:52:07,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:52:07,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-04-05 06:52:07,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675329611] [2022-04-05 06:52:07,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:52:07,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-05 06:52:07,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:52:07,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-05 06:52:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-04-05 06:52:07,682 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-04-05 06:52:12,233 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 [] [2022-04-05 06:52:20,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 06:52:24,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 06:52:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:52:24,180 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2022-04-05 06:52:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 06:52:24,180 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 134 [2022-04-05 06:52:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:52:24,181 INFO L225 Difference]: With dead ends: 119 [2022-04-05 06:52:24,181 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 06:52:24,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2022-04-05 06:52:24,184 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 84 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:52:24,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 113 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 230 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2022-04-05 06:52:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 06:52:24,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 06:52:24,185 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) [2022-04-05 06:52:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 06:52:24,185 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 134 [2022-04-05 06:52:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:52:24,185 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 06:52:24,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-04-05 06:52:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 06:52:24,185 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 06:52:24,187 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 06:52:24,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 06:52:24,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-05 06:52:24,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-05 06:52:27,688 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-05 06:52:27,688 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-05 06:52:27,688 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-05 06:52:27,688 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-05 06:52:27,689 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-05 06:52:27,689 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-05 06:52:27,689 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-05 06:52:27,689 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-05 06:52:27,689 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-04-05 06:52:27,689 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-04-05 06:52:27,689 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-04-05 06:52:27,689 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 56) the Hoare annotation is: true [2022-04-05 06:52:27,689 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* (- 1) main_~a~0))) (or (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ .cse0 32767) 65536))) (and (<= 0 (+ 65536 main_~a~0)) (< (div (+ main_~a~0 32768) (- 65536)) (+ (div (+ (- 1) .cse0) 65536) 1)) (< main_~a~0 0)))) [2022-04-05 06:52:27,689 INFO L882 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2022-04-05 06:52:27,689 INFO L878 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (let ((.cse0 (* main_~y~0 12))) (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~z~0 main_~z~0) 12) (+ .cse0 (* main_~z~0 6))) (= (+ (* main_~x~0 18) .cse0 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0))) [2022-04-05 06:52:27,689 INFO L878 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse1 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (let ((.cse0 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse0 main_~a~0)) (<= main_~a~0 50) (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse1 (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= .cse0 (+ main_~a~0 1)))) (and (= main_~x~0 0) (= main_~y~0 1) .cse1 (= main_~z~0 6)))) [2022-04-05 06:52:27,689 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (* main_~y~0 12))) (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~z~0 main_~z~0) 12) (+ .cse0 (* main_~z~0 6))) (= (+ (* main_~x~0 18) .cse0 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0))) [2022-04-05 06:52:27,690 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse1 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (let ((.cse0 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse0 main_~a~0)) (<= main_~a~0 50) (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse1 (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= .cse0 (+ main_~a~0 1)))) (and (= main_~x~0 0) (= main_~y~0 1) .cse1 (= main_~z~0 6)))) [2022-04-05 06:52:27,690 INFO L878 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse0 (* main_~y~0 12))) (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~z~0 main_~z~0) 12) (+ .cse0 (* main_~z~0 6))) (= (+ (* main_~x~0 18) .cse0 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0))) [2022-04-05 06:52:27,690 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse2 (* main_~y~0 12)) (.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse1 main_~a~0)) (<= main_~a~0 50) (= (+ (* main_~z~0 main_~z~0) 12) (+ .cse2 (* main_~z~0 6))) (= (+ (* main_~x~0 18) .cse2 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse0 (<= 0 main_~a~0) (<= .cse1 (+ main_~a~0 1)))))) [2022-04-05 06:52:27,690 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-04-05 06:52:27,690 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-04-05 06:52:27,690 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-04-05 06:52:27,690 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-04-05 06:52:27,690 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-04-05 06:52:27,690 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-04-05 06:52:27,690 INFO L882 garLoopResultBuilder]: For program point L38(lines 33 46) no Hoare annotation was computed. [2022-04-05 06:52:27,690 INFO L882 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-04-05 06:52:27,690 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 22 56) no Hoare annotation was computed. [2022-04-05 06:52:27,690 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 22 56) no Hoare annotation was computed. [2022-04-05 06:52:27,690 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-05 06:52:27,690 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-04-05 06:52:27,690 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-04-05 06:52:27,690 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-04-05 06:52:27,690 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-04-05 06:52:27,691 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-04-05 06:52:27,692 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1] [2022-04-05 06:52:27,693 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 06:52:27,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 06:52:27 BasicIcfg [2022-04-05 06:52:27,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 06:52:27,704 INFO L158 Benchmark]: Toolchain (without parser) took 96619.72ms. Allocated memory was 200.3MB in the beginning and 289.4MB in the end (delta: 89.1MB). Free memory was 149.0MB in the beginning and 236.1MB in the end (delta: -87.1MB). Peak memory consumption was 139.0MB. Max. memory is 8.0GB. [2022-04-05 06:52:27,704 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory is still 165.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 06:52:27,704 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.71ms. Allocated memory is still 200.3MB. Free memory was 148.8MB in the beginning and 176.0MB in the end (delta: -27.1MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-04-05 06:52:27,704 INFO L158 Benchmark]: Boogie Preprocessor took 24.09ms. Allocated memory is still 200.3MB. Free memory was 176.0MB in the beginning and 174.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 06:52:27,705 INFO L158 Benchmark]: RCFGBuilder took 261.13ms. Allocated memory is still 200.3MB. Free memory was 174.4MB in the beginning and 163.3MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 06:52:27,705 INFO L158 Benchmark]: IcfgTransformer took 31.71ms. Allocated memory is still 200.3MB. Free memory was 163.3MB in the beginning and 161.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 06:52:27,705 INFO L158 Benchmark]: TraceAbstraction took 96068.62ms. Allocated memory was 200.3MB in the beginning and 289.4MB in the end (delta: 89.1MB). Free memory was 161.3MB in the beginning and 236.1MB in the end (delta: -74.9MB). Peak memory consumption was 151.1MB. Max. memory is 8.0GB. [2022-04-05 06:52:27,706 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory is still 165.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 226.71ms. Allocated memory is still 200.3MB. Free memory was 148.8MB in the beginning and 176.0MB in the end (delta: -27.1MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.09ms. Allocated memory is still 200.3MB. Free memory was 176.0MB in the beginning and 174.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 261.13ms. Allocated memory is still 200.3MB. Free memory was 174.4MB in the beginning and 163.3MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 31.71ms. Allocated memory is still 200.3MB. Free memory was 163.3MB in the beginning and 161.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 96068.62ms. Allocated memory was 200.3MB in the beginning and 289.4MB in the end (delta: 89.1MB). Free memory was 161.3MB in the beginning and 236.1MB in the end (delta: -74.9MB). Peak memory consumption was 151.1MB. 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: 17]: 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, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 96.0s, OverallIterations: 15, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 21.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 241 SdHoareTripleChecker+Valid, 12.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 177 mSDsluCounter, 2067 SdHoareTripleChecker+Invalid, 12.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1465 mSDsCounter, 363 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2371 IncrementalHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 363 mSolverCounterUnsat, 602 mSDtfsCounter, 2371 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1536 GetRequests, 1372 SyntacticMatches, 10 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 36.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=12, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 54 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 70 PreInvPairs, 115 NumberOfFragments, 670 HoareAnnotationTreeSize, 70 FomulaSimplifications, 1288 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 19 FomulaSimplificationsInter, 29861 FormulaSimplificationTreeSizeReductionInter, 3.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 65.8s InterpolantComputationTime, 985 NumberOfCodeBlocks, 796 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1342 ConstructedInterpolants, 0 QuantifiedInterpolants, 5785 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1921 ConjunctsInSsa, 259 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 5633/5874 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 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((n <= a + 1 && a <= 50) && z * z + 12 == y * 12 + z * 6) && x * 18 + y * 12 + 6 == z * 2 + z * y) && n * 6 + 6 == z) && 0 <= a RESULT: Ultimate proved your program to be correct! [2022-04-05 06:52:27,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...