/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 17:06:20,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 17:06:20,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 17:06:20,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 17:06:20,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 17:06:20,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 17:06:20,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 17:06:20,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 17:06:20,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 17:06:20,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 17:06:20,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 17:06:20,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 17:06:20,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 17:06:20,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 17:06:20,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 17:06:20,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 17:06:20,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 17:06:20,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 17:06:20,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 17:06:20,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 17:06:20,436 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 17:06:20,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 17:06:20,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 17:06:20,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 17:06:20,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 17:06:20,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 17:06:20,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 17:06:20,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 17:06:20,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 17:06:20,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 17:06:20,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 17:06:20,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 17:06:20,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 17:06:20,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 17:06:20,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 17:06:20,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 17:06:20,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 17:06:20,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 17:06:20,451 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 17:06:20,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 17:06:20,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 17:06:20,452 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 17:06:20,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 17:06:20,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 17:06:20,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 17:06:20,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 17:06:20,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 17:06:20,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 17:06:20,453 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 17:06:20,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 17:06:20,453 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 17:06:20,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 17:06:20,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 17:06:20,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 17:06:20,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 17:06:20,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 17:06:20,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:06:20,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 17:06:20,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 17:06:20,454 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 17:06:20,454 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 17:06:20,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 17:06:20,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 17:06:20,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 17:06:20,689 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 17:06:20,689 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 17:06:20,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-03-17 17:06:20,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c48459f2/21a2e52c0a3f4533a1387443e5a391a8/FLAG820176998 [2022-03-17 17:06:21,036 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 17:06:21,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-03-17 17:06:21,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c48459f2/21a2e52c0a3f4533a1387443e5a391a8/FLAG820176998 [2022-03-17 17:06:21,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c48459f2/21a2e52c0a3f4533a1387443e5a391a8 [2022-03-17 17:06:21,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 17:06:21,479 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 17:06:21,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 17:06:21,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 17:06:21,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 17:06:21,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:06:21" (1/1) ... [2022-03-17 17:06:21,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b7d91f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:06:21, skipping insertion in model container [2022-03-17 17:06:21,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:06:21" (1/1) ... [2022-03-17 17:06:21,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 17:06:21,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 17:06:21,689 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/fermat1-ll_unwindbound20.c[535,548] [2022-03-17 17:06:21,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:06:21,731 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 17:06:21,737 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/fermat1-ll_unwindbound20.c[535,548] [2022-03-17 17:06:21,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:06:21,754 INFO L208 MainTranslator]: Completed translation [2022-03-17 17:06:21,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:06:21 WrapperNode [2022-03-17 17:06:21,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 17:06:21,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 17:06:21,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 17:06:21,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 17:06:21,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:06:21" (1/1) ... [2022-03-17 17:06:21,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:06:21" (1/1) ... [2022-03-17 17:06:21,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:06:21" (1/1) ... [2022-03-17 17:06:21,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:06:21" (1/1) ... [2022-03-17 17:06:21,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:06:21" (1/1) ... [2022-03-17 17:06:21,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:06:21" (1/1) ... [2022-03-17 17:06:21,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:06:21" (1/1) ... [2022-03-17 17:06:21,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 17:06:21,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 17:06:21,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 17:06:21,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 17:06:21,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:06:21" (1/1) ... [2022-03-17 17:06:21,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:06:21,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:21,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 17:06:21,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 17:06:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 17:06:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 17:06:21,821 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 17:06:21,821 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 17:06:21,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 17:06:21,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 17:06:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 17:06:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 17:06:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 17:06:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 17:06:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 17:06:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 17:06:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 17:06:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 17:06:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 17:06:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 17:06:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 17:06:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 17:06:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 17:06:21,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 17:06:21,860 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 17:06:21,861 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 17:06:22,013 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 17:06:22,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 17:06:22,017 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-17 17:06:22,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:06:22 BoogieIcfgContainer [2022-03-17 17:06:22,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 17:06:22,019 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 17:06:22,019 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 17:06:22,022 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 17:06:22,032 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:06:22" (1/1) ... [2022-03-17 17:06:22,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:06:22 BasicIcfg [2022-03-17 17:06:22,049 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 17:06:22,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 17:06:22,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 17:06:22,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 17:06:22,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 05:06:21" (1/4) ... [2022-03-17 17:06:22,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485cdcbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:06:22, skipping insertion in model container [2022-03-17 17:06:22,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:06:21" (2/4) ... [2022-03-17 17:06:22,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485cdcbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:06:22, skipping insertion in model container [2022-03-17 17:06:22,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:06:22" (3/4) ... [2022-03-17 17:06:22,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485cdcbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:06:22, skipping insertion in model container [2022-03-17 17:06:22,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:06:22" (4/4) ... [2022-03-17 17:06:22,054 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.cJordan [2022-03-17 17:06:22,058 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 17:06:22,058 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 17:06:22,084 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 17:06:22,088 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 17:06:22,088 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 17:06:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 17:06:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 17:06:22,104 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:22,105 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:22,105 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:22,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:22,108 INFO L85 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2022-03-17 17:06:22,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:22,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535333034] [2022-03-17 17:06:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:22,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:22,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:22,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919478929] [2022-03-17 17:06:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:22,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:22,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:22,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:22,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 17:06:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:22,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-17 17:06:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 17:06:22,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:06:22,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:22,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535333034] [2022-03-17 17:06:22,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:22,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919478929] [2022-03-17 17:06:22,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919478929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:06:22,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:06:22,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-17 17:06:22,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875399491] [2022-03-17 17:06:22,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:06:22,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-17 17:06:22,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:22,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-17 17:06:22,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-17 17:06:22,313 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 17:06:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:22,323 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-03-17 17:06:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-17 17:06:22,324 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-17 17:06:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:22,328 INFO L225 Difference]: With dead ends: 37 [2022-03-17 17:06:22,328 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 17:06:22,329 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-17 17:06:22,332 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:22,332 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:06:22,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 17:06:22,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-17 17:06:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 17:06:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-17 17:06:22,353 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-03-17 17:06:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:22,354 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-17 17:06:22,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 17:06:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-17 17:06:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 17:06:22,355 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:22,355 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:22,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:22,582 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-17 17:06:22,583 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:22,588 INFO L85 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2022-03-17 17:06:22,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:22,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815972352] [2022-03-17 17:06:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:22,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:22,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:22,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117850300] [2022-03-17 17:06:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:22,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:22,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:22,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 17:06:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:22,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 17:06:22,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:06:22,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:06:22,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:22,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815972352] [2022-03-17 17:06:22,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:22,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117850300] [2022-03-17 17:06:22,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117850300] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:06:22,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:06:22,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 17:06:22,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994757467] [2022-03-17 17:06:22,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:06:22,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 17:06:22,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:22,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 17:06:22,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:06:22,796 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 17:06:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:22,810 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-03-17 17:06:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 17:06:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 17:06:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:22,812 INFO L225 Difference]: With dead ends: 34 [2022-03-17 17:06:22,812 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 17:06:22,812 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:06:22,814 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:22,814 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:06:22,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 17:06:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-17 17:06:22,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 17:06:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-17 17:06:22,822 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-03-17 17:06:22,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:22,823 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-17 17:06:22,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 17:06:22,823 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-17 17:06:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 17:06:22,824 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:22,824 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:22,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:23,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-03-17 17:06:23,045 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:23,046 INFO L85 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2022-03-17 17:06:23,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:23,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114076173] [2022-03-17 17:06:23,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:23,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:23,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:23,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592629848] [2022-03-17 17:06:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:23,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:23,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:23,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:23,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 17:06:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:23,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 17:06:23,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:29,304 WARN L833 $PredicateComparison]: unable to prove that (or (<= 1 |c___VERIFIER_assert_#in~cond|) (and (<= 0 |c___VERIFIER_assert_#in~cond|) (exists ((aux_div_v_main_~u~0_BEFORE_CALL_1_39 Int)) (not (= (+ (* aux_div_v_main_~u~0_BEFORE_CALL_1_39 8) (* (let ((.cse0 (div (+ 2 (* aux_div_v_main_~u~0_BEFORE_CALL_1_39 (- 2))) (- 2)))) (* .cse0 .cse0)) 4)) (+ (* 4 (* aux_div_v_main_~u~0_BEFORE_CALL_1_39 aux_div_v_main_~u~0_BEFORE_CALL_1_39)) 4)))))) is different from false [2022-03-17 17:06:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:06:30,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:06:30,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:30,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114076173] [2022-03-17 17:06:30,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:30,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592629848] [2022-03-17 17:06:30,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592629848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:06:30,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:06:30,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:06:30,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534377080] [2022-03-17 17:06:30,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:06:30,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:06:30,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:30,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:06:30,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-03-17 17:06:30,872 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 17:06:32,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:06:32,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:32,913 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-03-17 17:06:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:06:32,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-17 17:06:32,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:32,915 INFO L225 Difference]: With dead ends: 51 [2022-03-17 17:06:32,915 INFO L226 Difference]: Without dead ends: 51 [2022-03-17 17:06:32,915 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-03-17 17:06:32,916 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 13 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:32,916 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 139 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 25 Unchecked, 2.0s Time] [2022-03-17 17:06:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-17 17:06:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-17 17:06:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 17:06:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-03-17 17:06:32,928 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-03-17 17:06:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:32,929 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-03-17 17:06:32,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 17:06:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-03-17 17:06:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 17:06:32,930 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:32,930 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-17 17:06:32,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:33,130 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:33,131 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:33,131 INFO L85 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2022-03-17 17:06:33,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:33,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106549912] [2022-03-17 17:06:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:33,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:33,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:33,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935349200] [2022-03-17 17:06:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:33,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:33,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:33,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:33,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 17:06:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:33,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 17:06:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:06:33,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:06:33,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:33,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106549912] [2022-03-17 17:06:33,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:33,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935349200] [2022-03-17 17:06:33,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935349200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:06:33,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:06:33,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-17 17:06:33,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108738160] [2022-03-17 17:06:33,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:33,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 17:06:33,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:33,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 17:06:33,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:06:33,398 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 17:06:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:33,491 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-03-17 17:06:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 17:06:33,491 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-03-17 17:06:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:33,492 INFO L225 Difference]: With dead ends: 55 [2022-03-17 17:06:33,492 INFO L226 Difference]: Without dead ends: 52 [2022-03-17 17:06:33,492 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-17 17:06:33,493 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:33,493 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 151 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:06:33,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-17 17:06:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-17 17:06:33,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 17:06:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-03-17 17:06:33,498 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 29 [2022-03-17 17:06:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:33,498 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-03-17 17:06:33,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 17:06:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-03-17 17:06:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 17:06:33,499 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:33,499 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:33,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:33,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:33,723 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2022-03-17 17:06:33,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:33,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321555591] [2022-03-17 17:06:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:33,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:33,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:33,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966781346] [2022-03-17 17:06:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:33,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:33,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:33,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:33,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 17:06:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:33,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:06:33,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:06:33,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:06:33,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321555591] [2022-03-17 17:06:33,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966781346] [2022-03-17 17:06:33,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966781346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:06:33,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:06:33,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:06:33,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893659505] [2022-03-17 17:06:33,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:06:33,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:06:33,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:33,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:06:33,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:06:33,854 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 17:06:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:33,874 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-03-17 17:06:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:06:33,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-03-17 17:06:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:33,875 INFO L225 Difference]: With dead ends: 60 [2022-03-17 17:06:33,875 INFO L226 Difference]: Without dead ends: 60 [2022-03-17 17:06:33,875 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:06:33,875 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:33,876 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:06:33,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-17 17:06:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-17 17:06:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 17:06:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-03-17 17:06:33,880 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 35 [2022-03-17 17:06:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:33,880 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-03-17 17:06:33,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 17:06:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-03-17 17:06:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 17:06:33,881 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:33,881 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:33,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:34,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:34,088 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:34,088 INFO L85 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2022-03-17 17:06:34,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:34,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682834260] [2022-03-17 17:06:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:34,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:34,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:34,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167325474] [2022-03-17 17:06:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:34,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:34,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:34,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:34,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 17:06:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:34,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 17:06:34,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:06:34,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-17 17:06:34,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:34,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682834260] [2022-03-17 17:06:34,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:34,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167325474] [2022-03-17 17:06:34,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167325474] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:06:34,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:06:34,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-03-17 17:06:34,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548129534] [2022-03-17 17:06:34,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:06:34,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:06:34,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:06:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:06:34,354 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 17:06:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:34,381 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-03-17 17:06:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 17:06:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-17 17:06:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:34,382 INFO L225 Difference]: With dead ends: 69 [2022-03-17 17:06:34,382 INFO L226 Difference]: Without dead ends: 69 [2022-03-17 17:06:34,382 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:06:34,383 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:34,383 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 141 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:06:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-17 17:06:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-17 17:06:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 17:06:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-03-17 17:06:34,387 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 41 [2022-03-17 17:06:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:34,388 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-03-17 17:06:34,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 17:06:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-03-17 17:06:34,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-17 17:06:34,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:34,389 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:34,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:34,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:34,604 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:34,604 INFO L85 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2022-03-17 17:06:34,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:34,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324432492] [2022-03-17 17:06:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:34,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:34,612 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:34,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563912867] [2022-03-17 17:06:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:34,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:34,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:34,628 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:34,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 17:06:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 17:06:34,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:06:34,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-17 17:06:34,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324432492] [2022-03-17 17:06:34,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:34,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563912867] [2022-03-17 17:06:34,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563912867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:06:34,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:06:34,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-17 17:06:34,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659303682] [2022-03-17 17:06:34,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:34,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 17:06:34,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 17:06:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:06:34,898 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-17 17:06:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:35,001 INFO L93 Difference]: Finished difference Result 133 states and 162 transitions. [2022-03-17 17:06:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 17:06:35,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-03-17 17:06:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:35,002 INFO L225 Difference]: With dead ends: 133 [2022-03-17 17:06:35,002 INFO L226 Difference]: Without dead ends: 133 [2022-03-17 17:06:35,003 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:06:35,003 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 113 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:35,003 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 233 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:06:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-17 17:06:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2022-03-17 17:06:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 86 states have (on average 1.244186046511628) internal successors, (107), 87 states have internal predecessors, (107), 22 states have call successors, (22), 12 states have call predecessors, (22), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-17 17:06:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 149 transitions. [2022-03-17 17:06:35,010 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 149 transitions. Word has length 43 [2022-03-17 17:06:35,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:35,011 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 149 transitions. [2022-03-17 17:06:35,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-17 17:06:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 149 transitions. [2022-03-17 17:06:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 17:06:35,011 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:35,012 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:35,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 17:06:35,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:35,230 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2022-03-17 17:06:35,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:35,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627096649] [2022-03-17 17:06:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:35,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:35,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:35,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251787366] [2022-03-17 17:06:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:35,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:35,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:35,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:35,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 17:06:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:35,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 17:06:35,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 17:06:35,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:06:35,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:35,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627096649] [2022-03-17 17:06:35,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:35,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251787366] [2022-03-17 17:06:35,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251787366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:06:35,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:06:35,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 17:06:35,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122708346] [2022-03-17 17:06:35,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:06:35,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 17:06:35,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:35,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 17:06:35,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:06:35,368 INFO L87 Difference]: Start difference. First operand 119 states and 149 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 17:06:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:35,387 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2022-03-17 17:06:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 17:06:35,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-03-17 17:06:35,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:35,389 INFO L225 Difference]: With dead ends: 119 [2022-03-17 17:06:35,389 INFO L226 Difference]: Without dead ends: 119 [2022-03-17 17:06:35,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:06:35,390 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 23 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:35,390 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:06:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-17 17:06:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-03-17 17:06:35,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 17:06:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-03-17 17:06:35,396 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 47 [2022-03-17 17:06:35,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:35,396 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-03-17 17:06:35,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 17:06:35,396 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-03-17 17:06:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-17 17:06:35,397 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:35,397 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:35,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:35,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-17 17:06:35,613 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:35,613 INFO L85 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2022-03-17 17:06:35,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:35,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748377979] [2022-03-17 17:06:35,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:35,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:35,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:35,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856682688] [2022-03-17 17:06:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:35,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:35,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:35,621 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:35,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 17:06:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 17:06:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:06:35,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 17:06:35,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748377979] [2022-03-17 17:06:35,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856682688] [2022-03-17 17:06:35,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856682688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:06:35,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:06:35,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-17 17:06:35,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257439868] [2022-03-17 17:06:35,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:35,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 17:06:35,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 17:06:35,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-17 17:06:35,851 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-17 17:06:35,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:35,972 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2022-03-17 17:06:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 17:06:35,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-03-17 17:06:35,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:35,973 INFO L225 Difference]: With dead ends: 172 [2022-03-17 17:06:35,973 INFO L226 Difference]: Without dead ends: 172 [2022-03-17 17:06:35,974 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-03-17 17:06:35,974 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 106 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:35,974 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 269 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:06:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-17 17:06:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-03-17 17:06:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 113 states have internal predecessors, (139), 30 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-17 17:06:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-03-17 17:06:35,993 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 49 [2022-03-17 17:06:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:35,994 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-03-17 17:06:35,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-17 17:06:35,994 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-03-17 17:06:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 17:06:35,994 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:35,994 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:36,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:36,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:36,195 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2022-03-17 17:06:36,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:36,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500541453] [2022-03-17 17:06:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:36,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:36,203 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:36,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264780705] [2022-03-17 17:06:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:36,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:36,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:36,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:36,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 17:06:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 17:06:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:06:36,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 17:06:36,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:36,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500541453] [2022-03-17 17:06:36,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:36,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264780705] [2022-03-17 17:06:36,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264780705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:06:36,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:06:36,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-17 17:06:36,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662110422] [2022-03-17 17:06:36,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:36,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 17:06:36,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:36,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 17:06:36,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:06:36,485 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-17 17:06:36,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:36,661 INFO L93 Difference]: Finished difference Result 206 states and 267 transitions. [2022-03-17 17:06:36,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 17:06:36,662 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 55 [2022-03-17 17:06:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:36,663 INFO L225 Difference]: With dead ends: 206 [2022-03-17 17:06:36,663 INFO L226 Difference]: Without dead ends: 206 [2022-03-17 17:06:36,663 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-03-17 17:06:36,663 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 200 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:36,664 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 296 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:06:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-17 17:06:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-03-17 17:06:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 149 states have internal predecessors, (179), 40 states have call successors, (40), 14 states have call predecessors, (40), 12 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-17 17:06:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2022-03-17 17:06:36,669 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 55 [2022-03-17 17:06:36,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:36,671 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2022-03-17 17:06:36,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-17 17:06:36,671 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2022-03-17 17:06:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-17 17:06:36,672 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:36,672 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:36,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-17 17:06:36,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 17:06:36,899 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash -725338187, now seen corresponding path program 1 times [2022-03-17 17:06:36,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:36,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061173967] [2022-03-17 17:06:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:36,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:36,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:36,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849464613] [2022-03-17 17:06:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:36,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:36,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:36,907 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:36,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 17:06:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 17:06:36,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-17 17:06:37,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-17 17:06:37,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:37,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061173967] [2022-03-17 17:06:37,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:37,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849464613] [2022-03-17 17:06:37,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849464613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:06:37,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:06:37,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-03-17 17:06:37,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982799881] [2022-03-17 17:06:37,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:37,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 17:06:37,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:37,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 17:06:37,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:06:37,211 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 17:06:37,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:37,238 INFO L93 Difference]: Finished difference Result 381 states and 522 transitions. [2022-03-17 17:06:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:06:37,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 91 [2022-03-17 17:06:37,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:37,240 INFO L225 Difference]: With dead ends: 381 [2022-03-17 17:06:37,240 INFO L226 Difference]: Without dead ends: 359 [2022-03-17 17:06:37,240 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:06:37,242 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 15 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:37,242 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 167 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:06:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-17 17:06:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2022-03-17 17:06:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2666666666666666) internal successors, (323), 261 states have internal predecessors, (323), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-17 17:06:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 469 transitions. [2022-03-17 17:06:37,252 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 469 transitions. Word has length 91 [2022-03-17 17:06:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:37,253 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 469 transitions. [2022-03-17 17:06:37,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 17:06:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 469 transitions. [2022-03-17 17:06:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-17 17:06:37,254 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:37,254 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:37,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:37,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 17:06:37,469 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:37,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1986043633, now seen corresponding path program 2 times [2022-03-17 17:06:37,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:37,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831546780] [2022-03-17 17:06:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:37,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:37,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:37,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33503702] [2022-03-17 17:06:37,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:06:37,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:37,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:37,488 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:37,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 17:06:37,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:06:37,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:06:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 17:06:37,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-17 17:06:37,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-17 17:06:37,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:37,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831546780] [2022-03-17 17:06:37,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:37,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33503702] [2022-03-17 17:06:37,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33503702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:06:37,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:06:37,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-17 17:06:37,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14591934] [2022-03-17 17:06:37,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:37,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 17:06:37,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:37,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 17:06:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-17 17:06:37,982 INFO L87 Difference]: Start difference. First operand 342 states and 469 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-03-17 17:06:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:38,320 INFO L93 Difference]: Finished difference Result 842 states and 1155 transitions. [2022-03-17 17:06:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-17 17:06:38,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) Word has length 91 [2022-03-17 17:06:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:38,323 INFO L225 Difference]: With dead ends: 842 [2022-03-17 17:06:38,323 INFO L226 Difference]: Without dead ends: 842 [2022-03-17 17:06:38,324 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 17:06:38,324 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 304 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:38,324 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 384 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 17:06:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-17 17:06:38,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 793. [2022-03-17 17:06:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 597 states have (on average 1.2680067001675042) internal successors, (757), 606 states have internal predecessors, (757), 177 states have call successors, (177), 20 states have call predecessors, (177), 18 states have return successors, (175), 166 states have call predecessors, (175), 175 states have call successors, (175) [2022-03-17 17:06:38,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1109 transitions. [2022-03-17 17:06:38,345 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1109 transitions. Word has length 91 [2022-03-17 17:06:38,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:38,345 INFO L478 AbstractCegarLoop]: Abstraction has 793 states and 1109 transitions. [2022-03-17 17:06:38,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-03-17 17:06:38,345 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1109 transitions. [2022-03-17 17:06:38,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-17 17:06:38,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:38,346 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-03-17 17:06:38,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:38,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 17:06:38,564 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:38,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 1 times [2022-03-17 17:06:38,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:38,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714708242] [2022-03-17 17:06:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:38,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:38,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:38,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118522854] [2022-03-17 17:06:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:38,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:38,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:38,574 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:38,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 17:06:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 17:06:38,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:06:38,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-17 17:06:39,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:39,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714708242] [2022-03-17 17:06:39,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:39,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118522854] [2022-03-17 17:06:39,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118522854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:06:39,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:06:39,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-17 17:06:39,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745177853] [2022-03-17 17:06:39,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:39,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 17:06:39,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 17:06:39,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-17 17:06:39,222 INFO L87 Difference]: Start difference. First operand 793 states and 1109 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-03-17 17:06:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:39,682 INFO L93 Difference]: Finished difference Result 819 states and 1083 transitions. [2022-03-17 17:06:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-17 17:06:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) Word has length 97 [2022-03-17 17:06:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:39,686 INFO L225 Difference]: With dead ends: 819 [2022-03-17 17:06:39,686 INFO L226 Difference]: Without dead ends: 795 [2022-03-17 17:06:39,687 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-03-17 17:06:39,687 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 539 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:39,688 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 434 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 17:06:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-03-17 17:06:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 740. [2022-03-17 17:06:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 553 states have (on average 1.2206148282097649) internal successors, (675), 557 states have internal predecessors, (675), 164 states have call successors, (164), 24 states have call predecessors, (164), 22 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-03-17 17:06:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1001 transitions. [2022-03-17 17:06:39,705 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1001 transitions. Word has length 97 [2022-03-17 17:06:39,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:39,705 INFO L478 AbstractCegarLoop]: Abstraction has 740 states and 1001 transitions. [2022-03-17 17:06:39,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-03-17 17:06:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1001 transitions. [2022-03-17 17:06:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-17 17:06:39,706 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:39,706 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-17 17:06:39,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-17 17:06:39,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 17:06:39,923 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:39,924 INFO L85 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 1 times [2022-03-17 17:06:39,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:39,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810535201] [2022-03-17 17:06:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:39,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:39,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:39,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374606496] [2022-03-17 17:06:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:39,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:39,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:39,931 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:39,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 17:06:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:39,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 17:06:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 17:06:40,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-17 17:06:40,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:40,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810535201] [2022-03-17 17:06:40,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:40,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374606496] [2022-03-17 17:06:40,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374606496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:06:40,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:06:40,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-17 17:06:40,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530818010] [2022-03-17 17:06:40,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:40,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 17:06:40,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:40,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 17:06:40,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-17 17:06:40,445 INFO L87 Difference]: Start difference. First operand 740 states and 1001 transitions. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 22 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 20 states have call predecessors, (26), 21 states have call successors, (26) [2022-03-17 17:06:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:40,970 INFO L93 Difference]: Finished difference Result 752 states and 995 transitions. [2022-03-17 17:06:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-17 17:06:40,971 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 22 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 20 states have call predecessors, (26), 21 states have call successors, (26) Word has length 103 [2022-03-17 17:06:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:40,973 INFO L225 Difference]: With dead ends: 752 [2022-03-17 17:06:40,973 INFO L226 Difference]: Without dead ends: 752 [2022-03-17 17:06:40,973 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=1009, Unknown=0, NotChecked=0, Total=1560 [2022-03-17 17:06:40,974 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 637 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:40,974 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 500 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 17:06:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-03-17 17:06:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 746. [2022-03-17 17:06:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 559 states have (on average 1.186046511627907) internal successors, (663), 561 states have internal predecessors, (663), 164 states have call successors, (164), 24 states have call predecessors, (164), 22 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2022-03-17 17:06:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 989 transitions. [2022-03-17 17:06:40,986 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 989 transitions. Word has length 103 [2022-03-17 17:06:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:40,986 INFO L478 AbstractCegarLoop]: Abstraction has 746 states and 989 transitions. [2022-03-17 17:06:40,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 22 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 20 states have call predecessors, (26), 21 states have call successors, (26) [2022-03-17 17:06:40,987 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 989 transitions. [2022-03-17 17:06:40,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-17 17:06:40,989 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:40,989 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 10, 8, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:41,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:41,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:41,204 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:41,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2108944290, now seen corresponding path program 3 times [2022-03-17 17:06:41,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:41,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813846096] [2022-03-17 17:06:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:41,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:41,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:41,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517489814] [2022-03-17 17:06:41,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 17:06:41,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:41,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:41,240 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:41,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 17:06:41,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 17:06:41,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:06:41,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 17:06:41,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2022-03-17 17:06:41,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:06:41,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:41,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813846096] [2022-03-17 17:06:41,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:41,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517489814] [2022-03-17 17:06:41,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517489814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:06:41,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:06:41,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:06:41,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555525897] [2022-03-17 17:06:41,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:06:41,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:06:41,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:41,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:06:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:06:41,551 INFO L87 Difference]: Start difference. First operand 746 states and 989 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 17:06:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:41,574 INFO L93 Difference]: Finished difference Result 831 states and 1084 transitions. [2022-03-17 17:06:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 17:06:41,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 173 [2022-03-17 17:06:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:41,576 INFO L225 Difference]: With dead ends: 831 [2022-03-17 17:06:41,576 INFO L226 Difference]: Without dead ends: 807 [2022-03-17 17:06:41,578 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 17:06:41,578 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 14 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:41,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 160 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:06:41,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-03-17 17:06:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 772. [2022-03-17 17:06:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 580 states have (on average 1.1741379310344828) internal successors, (681), 582 states have internal predecessors, (681), 166 states have call successors, (166), 27 states have call predecessors, (166), 25 states have return successors, (164), 162 states have call predecessors, (164), 164 states have call successors, (164) [2022-03-17 17:06:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1011 transitions. [2022-03-17 17:06:41,592 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1011 transitions. Word has length 173 [2022-03-17 17:06:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:41,594 INFO L478 AbstractCegarLoop]: Abstraction has 772 states and 1011 transitions. [2022-03-17 17:06:41,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 17:06:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1011 transitions. [2022-03-17 17:06:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-17 17:06:41,596 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:41,596 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:41,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:41,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-17 17:06:41,800 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:41,801 INFO L85 PathProgramCache]: Analyzing trace with hash -147451011, now seen corresponding path program 1 times [2022-03-17 17:06:41,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:41,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386655096] [2022-03-17 17:06:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:41,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:41,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:41,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289217696] [2022-03-17 17:06:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:41,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:41,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:41,809 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:41,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 17:06:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:06:41,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2022-03-17 17:06:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 546 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2022-03-17 17:06:42,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:06:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:42,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386655096] [2022-03-17 17:06:42,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:42,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289217696] [2022-03-17 17:06:42,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289217696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:06:42,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:06:42,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 17:06:42,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065723931] [2022-03-17 17:06:42,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:06:42,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 17:06:42,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 17:06:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:06:42,092 INFO L87 Difference]: Start difference. First operand 772 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-17 17:06:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:42,137 INFO L93 Difference]: Finished difference Result 964 states and 1259 transitions. [2022-03-17 17:06:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 17:06:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 177 [2022-03-17 17:06:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:42,139 INFO L225 Difference]: With dead ends: 964 [2022-03-17 17:06:42,140 INFO L226 Difference]: Without dead ends: 818 [2022-03-17 17:06:42,150 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:06:42,151 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:42,151 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:06:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-03-17 17:06:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 769. [2022-03-17 17:06:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 580 states have (on average 1.1706896551724137) internal successors, (679), 583 states have internal predecessors, (679), 163 states have call successors, (163), 27 states have call predecessors, (163), 25 states have return successors, (161), 158 states have call predecessors, (161), 161 states have call successors, (161) [2022-03-17 17:06:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1003 transitions. [2022-03-17 17:06:42,166 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1003 transitions. Word has length 177 [2022-03-17 17:06:42,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:42,166 INFO L478 AbstractCegarLoop]: Abstraction has 769 states and 1003 transitions. [2022-03-17 17:06:42,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-17 17:06:42,166 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1003 transitions. [2022-03-17 17:06:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-17 17:06:42,168 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:42,168 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 8, 8, 8, 8, 8, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:42,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:42,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 17:06:42,385 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:42,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1282959772, now seen corresponding path program 2 times [2022-03-17 17:06:42,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:42,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245542098] [2022-03-17 17:06:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:42,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:42,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:42,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839249275] [2022-03-17 17:06:42,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:06:42,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:42,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:42,394 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:42,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 17:06:42,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:06:42,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:06:42,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-17 17:06:42,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 226 proven. 726 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 17:06:42,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 94 proven. 182 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2022-03-17 17:06:43,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:43,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245542098] [2022-03-17 17:06:43,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:43,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839249275] [2022-03-17 17:06:43,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839249275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:06:43,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:06:43,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-03-17 17:06:43,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373618868] [2022-03-17 17:06:43,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:43,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 17:06:43,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:43,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 17:06:43,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-17 17:06:43,140 INFO L87 Difference]: Start difference. First operand 769 states and 1003 transitions. Second operand has 24 states, 24 states have (on average 7.625) internal successors, (183), 24 states have internal predecessors, (183), 22 states have call successors, (44), 20 states have call predecessors, (44), 20 states have return successors, (42), 21 states have call predecessors, (42), 22 states have call successors, (42) [2022-03-17 17:06:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:43,459 INFO L93 Difference]: Finished difference Result 762 states and 989 transitions. [2022-03-17 17:06:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-17 17:06:43,459 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 24 states have internal predecessors, (183), 22 states have call successors, (44), 20 states have call predecessors, (44), 20 states have return successors, (42), 21 states have call predecessors, (42), 22 states have call successors, (42) Word has length 177 [2022-03-17 17:06:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:43,461 INFO L225 Difference]: With dead ends: 762 [2022-03-17 17:06:43,461 INFO L226 Difference]: Without dead ends: 752 [2022-03-17 17:06:43,462 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=631, Invalid=1091, Unknown=0, NotChecked=0, Total=1722 [2022-03-17 17:06:43,462 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 391 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:43,462 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 495 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 17:06:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-03-17 17:06:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 748. [2022-03-17 17:06:43,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 566 states have (on average 1.1607773851590106) internal successors, (657), 566 states have internal predecessors, (657), 158 states have call successors, (158), 25 states have call predecessors, (158), 23 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2022-03-17 17:06:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 971 transitions. [2022-03-17 17:06:43,499 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 971 transitions. Word has length 177 [2022-03-17 17:06:43,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:43,501 INFO L478 AbstractCegarLoop]: Abstraction has 748 states and 971 transitions. [2022-03-17 17:06:43,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 24 states have internal predecessors, (183), 22 states have call successors, (44), 20 states have call predecessors, (44), 20 states have return successors, (42), 21 states have call predecessors, (42), 22 states have call successors, (42) [2022-03-17 17:06:43,501 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 971 transitions. [2022-03-17 17:06:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-17 17:06:43,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:43,504 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:43,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:43,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 17:06:43,721 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:43,721 INFO L85 PathProgramCache]: Analyzing trace with hash 529165983, now seen corresponding path program 2 times [2022-03-17 17:06:43,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:43,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680546052] [2022-03-17 17:06:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:43,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:43,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:43,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038475518] [2022-03-17 17:06:43,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:06:43,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:43,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:43,747 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:43,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-17 17:06:43,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:06:43,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:06:43,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-17 17:06:43,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 490 proven. 112 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2022-03-17 17:06:45,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 189 proven. 92 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2022-03-17 17:06:46,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:46,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680546052] [2022-03-17 17:06:46,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:46,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038475518] [2022-03-17 17:06:46,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038475518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:06:46,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:06:46,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-03-17 17:06:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192313800] [2022-03-17 17:06:46,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:46,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 17:06:46,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 17:06:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-17 17:06:46,477 INFO L87 Difference]: Start difference. First operand 748 states and 971 transitions. Second operand has 20 states, 19 states have (on average 6.157894736842105) internal successors, (117), 17 states have internal predecessors, (117), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 17 states have call predecessors, (39), 15 states have call successors, (39) [2022-03-17 17:06:48,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:48,049 INFO L93 Difference]: Finished difference Result 1243 states and 1688 transitions. [2022-03-17 17:06:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-17 17:06:48,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.157894736842105) internal successors, (117), 17 states have internal predecessors, (117), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 17 states have call predecessors, (39), 15 states have call successors, (39) Word has length 183 [2022-03-17 17:06:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:48,053 INFO L225 Difference]: With dead ends: 1243 [2022-03-17 17:06:48,053 INFO L226 Difference]: Without dead ends: 1231 [2022-03-17 17:06:48,054 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 350 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-03-17 17:06:48,054 INFO L912 BasicCegarLoop]: 151 mSDtfsCounter, 81 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:48,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1495 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 210 Invalid, 0 Unknown, 206 Unchecked, 0.5s Time] [2022-03-17 17:06:48,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-03-17 17:06:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 904. [2022-03-17 17:06:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 685 states have (on average 1.197080291970803) internal successors, (820), 685 states have internal predecessors, (820), 195 states have call successors, (195), 25 states have call predecessors, (195), 23 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2022-03-17 17:06:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1208 transitions. [2022-03-17 17:06:48,087 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1208 transitions. Word has length 183 [2022-03-17 17:06:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:48,087 INFO L478 AbstractCegarLoop]: Abstraction has 904 states and 1208 transitions. [2022-03-17 17:06:48,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.157894736842105) internal successors, (117), 17 states have internal predecessors, (117), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 17 states have call predecessors, (39), 15 states have call successors, (39) [2022-03-17 17:06:48,088 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1208 transitions. [2022-03-17 17:06:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-17 17:06:48,090 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:48,090 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 9, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:48,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:48,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 17:06:48,303 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:48,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1607491483, now seen corresponding path program 3 times [2022-03-17 17:06:48,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:48,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092543348] [2022-03-17 17:06:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:48,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:48,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:48,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574617553] [2022-03-17 17:06:48,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 17:06:48,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:48,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:48,323 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:48,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-17 17:06:48,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 17:06:48,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:06:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 17:06:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 128 proven. 1 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2022-03-17 17:06:48,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:50,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:50,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092543348] [2022-03-17 17:06:50,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:50,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574617553] [2022-03-17 17:06:50,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574617553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 17:06:50,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:06:50,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-17 17:06:50,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917720718] [2022-03-17 17:06:50,822 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:50,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 17:06:50,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:50,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 17:06:50,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2022-03-17 17:06:50,823 INFO L87 Difference]: Start difference. First operand 904 states and 1208 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:06:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:50,935 INFO L93 Difference]: Finished difference Result 958 states and 1277 transitions. [2022-03-17 17:06:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 17:06:50,935 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 183 [2022-03-17 17:06:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:50,938 INFO L225 Difference]: With dead ends: 958 [2022-03-17 17:06:50,938 INFO L226 Difference]: Without dead ends: 925 [2022-03-17 17:06:50,939 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-03-17 17:06:50,939 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 38 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:50,939 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 260 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:06:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-03-17 17:06:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 865. [2022-03-17 17:06:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 650 states have (on average 1.1846153846153846) internal successors, (770), 659 states have internal predecessors, (770), 189 states have call successors, (189), 27 states have call predecessors, (189), 25 states have return successors, (187), 178 states have call predecessors, (187), 187 states have call successors, (187) [2022-03-17 17:06:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1146 transitions. [2022-03-17 17:06:50,953 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1146 transitions. Word has length 183 [2022-03-17 17:06:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:50,954 INFO L478 AbstractCegarLoop]: Abstraction has 865 states and 1146 transitions. [2022-03-17 17:06:50,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:06:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1146 transitions. [2022-03-17 17:06:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-17 17:06:50,956 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:50,956 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 10, 10, 10, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:50,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:51,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:51,172 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash -310501698, now seen corresponding path program 4 times [2022-03-17 17:06:51,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:51,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415241184] [2022-03-17 17:06:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:51,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:51,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:51,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533944233] [2022-03-17 17:06:51,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 17:06:51,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:51,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:51,185 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:51,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-17 17:06:51,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 17:06:51,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:06:51,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 17:06:51,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:06:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 402 proven. 144 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-03-17 17:06:51,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:06:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 142 proven. 156 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2022-03-17 17:06:52,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:06:52,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415241184] [2022-03-17 17:06:52,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:06:52,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533944233] [2022-03-17 17:06:52,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533944233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:06:52,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:06:52,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-17 17:06:52,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689849356] [2022-03-17 17:06:52,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:06:52,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 17:06:52,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:06:52,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 17:06:52,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-17 17:06:52,043 INFO L87 Difference]: Start difference. First operand 865 states and 1146 transitions. Second operand has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 18 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 18 states have call predecessors, (37), 18 states have call successors, (37) [2022-03-17 17:06:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:06:52,704 INFO L93 Difference]: Finished difference Result 1791 states and 2395 transitions. [2022-03-17 17:06:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-17 17:06:52,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 18 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 18 states have call predecessors, (37), 18 states have call successors, (37) Word has length 183 [2022-03-17 17:06:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:06:52,709 INFO L225 Difference]: With dead ends: 1791 [2022-03-17 17:06:52,709 INFO L226 Difference]: Without dead ends: 1786 [2022-03-17 17:06:52,710 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 17:06:52,710 INFO L912 BasicCegarLoop]: 161 mSDtfsCounter, 258 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 17:06:52,710 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 1063 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 17:06:52,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2022-03-17 17:06:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1277. [2022-03-17 17:06:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 965 states have (on average 1.166839378238342) internal successors, (1126), 976 states have internal predecessors, (1126), 286 states have call successors, (286), 27 states have call predecessors, (286), 25 states have return successors, (284), 273 states have call predecessors, (284), 284 states have call successors, (284) [2022-03-17 17:06:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1696 transitions. [2022-03-17 17:06:52,773 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1696 transitions. Word has length 183 [2022-03-17 17:06:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:06:52,774 INFO L478 AbstractCegarLoop]: Abstraction has 1277 states and 1696 transitions. [2022-03-17 17:06:52,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 18 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 18 states have call predecessors, (37), 18 states have call successors, (37) [2022-03-17 17:06:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1696 transitions. [2022-03-17 17:06:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-17 17:06:52,777 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:06:52,777 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:52,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-17 17:06:52,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:52,996 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:06:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:06:52,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1584301742, now seen corresponding path program 5 times [2022-03-17 17:06:52,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:06:52,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32759027] [2022-03-17 17:06:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:06:52,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:06:53,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:06:53,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010031598] [2022-03-17 17:06:53,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 17:06:53,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:53,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:06:53,012 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:06:53,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-17 17:06:53,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-17 17:06:53,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-17 17:06:53,396 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-17 17:06:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 17:06:53,533 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-17 17:06:53,533 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-17 17:06:53,534 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 17:06:53,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-17 17:06:53,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:06:53,749 INFO L718 BasicCegarLoop]: Path program histogram: [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:06:53,751 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 17:06:53,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:06:53 BasicIcfg [2022-03-17 17:06:53,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 17:06:53,844 INFO L158 Benchmark]: Toolchain (without parser) took 32365.47ms. Allocated memory was 208.7MB in the beginning and 254.8MB in the end (delta: 46.1MB). Free memory was 157.6MB in the beginning and 191.5MB in the end (delta: -33.9MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. [2022-03-17 17:06:53,844 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 208.7MB. Free memory is still 173.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 17:06:53,844 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.69ms. Allocated memory is still 208.7MB. Free memory was 157.4MB in the beginning and 183.4MB in the end (delta: -26.0MB). Peak memory consumption was 5.0MB. Max. memory is 8.0GB. [2022-03-17 17:06:53,844 INFO L158 Benchmark]: Boogie Preprocessor took 17.97ms. Allocated memory is still 208.7MB. Free memory was 183.4MB in the beginning and 181.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 17:06:53,845 INFO L158 Benchmark]: RCFGBuilder took 245.26ms. Allocated memory is still 208.7MB. Free memory was 181.9MB in the beginning and 170.8MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 17:06:53,845 INFO L158 Benchmark]: IcfgTransformer took 30.81ms. Allocated memory is still 208.7MB. Free memory was 170.8MB in the beginning and 169.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 17:06:53,845 INFO L158 Benchmark]: TraceAbstraction took 31793.40ms. Allocated memory was 208.7MB in the beginning and 254.8MB in the end (delta: 46.1MB). Free memory was 168.7MB in the beginning and 191.5MB in the end (delta: -22.8MB). Peak memory consumption was 24.8MB. Max. memory is 8.0GB. [2022-03-17 17:06:53,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 208.7MB. Free memory is still 173.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 263.69ms. Allocated memory is still 208.7MB. Free memory was 157.4MB in the beginning and 183.4MB in the end (delta: -26.0MB). Peak memory consumption was 5.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.97ms. Allocated memory is still 208.7MB. Free memory was 183.4MB in the beginning and 181.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 245.26ms. Allocated memory is still 208.7MB. Free memory was 181.9MB in the beginning and 170.8MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 30.81ms. Allocated memory is still 208.7MB. Free memory was 170.8MB in the beginning and 169.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 31793.40ms. Allocated memory was 208.7MB in the beginning and 254.8MB in the end (delta: 46.1MB). Free memory was 168.7MB in the beginning and 191.5MB in the end (delta: -22.8MB). Peak memory consumption was 24.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=26, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=573, counter=0, R=23] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=573, counter=0, R=23] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=573, counter=0, r=-44, R=23, u=47, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=1, counter++=0, r=-44, R=23, u=47, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=1, R=23, r=-44, u=47, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=573, counter=1, R=23, r=-44, u=47, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=2, counter++=1, R=23, r=-44, u=47, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=2, r=-44, R=23, u=47, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=573, counter=2, r=-44, R=23, u=47, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=3, counter++=2, R=23, r=-44, u=47, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=3, R=23, r=-44, u=47, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=573, counter=3, r=3, R=23, u=49, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=4, counter++=3, r=3, R=23, u=49, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=4, R=23, r=3, u=49, v=1] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=573, counter=4, r=3, R=23, u=49, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=5, counter++=4, R=23, r=3, u=49, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=5, R=23, r=3, u=49, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=573, counter=5, r=3, R=23, u=49, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=6, counter++=5, r=3, R=23, u=49, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=6, R=23, r=3, u=49, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=6, r=2, R=23, u=49, v=3] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=7, counter++=6, r=2, R=23, u=49, v=3] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=7, R=23, r=2, u=49, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=7, R=23, r=-1, u=49, v=5] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=8, counter++=7, R=23, r=-1, u=49, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=8, R=23, r=-1, u=49, v=5] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=573, counter=8, r=-1, R=23, u=49, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=9, counter++=8, r=-1, R=23, u=49, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=9, r=-1, R=23, u=49, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=573, counter=9, R=23, r=48, u=51, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=10, counter++=9, r=48, R=23, u=51, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=10, r=48, R=23, u=51, v=5] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=573, counter=10, R=23, r=48, u=51, v=5] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=11, counter++=10, R=23, r=48, u=51, v=5] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=11] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=11, r=48, R=23, u=51, v=5] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=573, counter=11, r=48, R=23, u=51, v=5] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=12, counter++=11, r=48, R=23, u=51, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=12] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=12, r=48, R=23, u=51, v=5] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=12, r=43, R=23, u=51, v=7] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=13, counter++=12, r=43, R=23, u=51, v=7] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=13, r=43, R=23, u=51, v=7] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=13, R=23, r=36, u=51, v=9] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=14, counter++=13, r=36, R=23, u=51, v=9] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=14] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=14, R=23, r=36, u=51, v=9] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=14, r=27, R=23, u=51, v=11] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=15, counter++=14, R=23, r=27, u=51, v=11] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=15] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=15, R=23, r=27, u=51, v=11] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=15, R=23, r=16, u=51, v=13] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=16, counter++=15, r=16, R=23, u=51, v=13] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=16] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=16, R=23, r=16, u=51, v=13] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=16, r=3, R=23, u=51, v=15] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=17, counter++=16, r=3, R=23, u=51, v=15] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=17, R=23, r=3, u=51, v=15] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=17, R=23, r=-12, u=51, v=17] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=18, counter++=17, r=-12, R=23, u=51, v=17] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=18] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=18, r=-12, R=23, u=51, v=17] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=573, counter=18, r=-12, R=23, u=51, v=17] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=19, counter++=18, R=23, r=-12, u=51, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=19] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=19, R=23, r=-12, u=51, v=17] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=573, counter=19, R=23, r=39, u=53, v=17] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=20, counter++=19, R=23, r=39, u=53, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=20] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=20, R=23, r=39, u=53, v=17] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=573, counter=20, R=23, r=39, u=53, v=17] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=21, counter++=20, r=39, R=23, u=53, v=17] [L34] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 31.7s, OverallIterations: 21, TraceHistogramMax: 21, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 2809 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2789 mSDsluCounter, 6639 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 231 IncrementalHoareTripleChecker+Unchecked, 5340 mSDsCounter, 1705 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2375 IncrementalHoareTripleChecker+Invalid, 4312 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1705 mSolverCounterUnsat, 1299 mSDtfsCounter, 2375 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3076 GetRequests, 2763 SyntacticMatches, 7 SemanticMatches, 306 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1277occurred in iteration=20, InterpolantAutomatonStates: 304, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 1164 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 17.8s InterpolantComputationTime, 2008 NumberOfCodeBlocks, 1737 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2935 ConstructedInterpolants, 45 QuantifiedInterpolants, 9072 SizeOfPredicates, 86 NumberOfNonLiveVariables, 4126 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 8903/11070 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 RESULT: Ultimate proved your program to be incorrect! [2022-03-17 17:06:53,875 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...