/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 22:47:20,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 22:47:20,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 22:47:20,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 22:47:20,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 22:47:20,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 22:47:20,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 22:47:20,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 22:47:20,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 22:47:20,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 22:47:20,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 22:47:20,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 22:47:20,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 22:47:20,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 22:47:20,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 22:47:20,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 22:47:20,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 22:47:20,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 22:47:20,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 22:47:20,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 22:47:20,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 22:47:20,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 22:47:20,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 22:47:20,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 22:47:20,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 22:47:20,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 22:47:20,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 22:47:20,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 22:47:20,854 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 22:47:20,873 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 22:47:20,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 22:47:20,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 22:47:20,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 22:47:20,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 22:47:20,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 22:47:20,875 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 22:47:20,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 22:47:20,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 22:47:20,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 22:47:20,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 22:47:20,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 22:47:20,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 22:47:20,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 22:47:20,876 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 22:47:20,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 22:47:20,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 22:47:20,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 22:47:20,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 22:47:20,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:47:20,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 22:47:20,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 22:47:20,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 22:47:20,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 22:47:20,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 22:47:20,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 22:47:20,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 22:47:20,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 22:47:20,878 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 22:47:20,878 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 22:47:21,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 22:47:21,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 22:47:21,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 22:47:21,080 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 22:47:21,080 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 22:47:21,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2022-02-23 22:47:21,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0ec77aed/57db7e7c3cd842f6b8a6ff2a6a61ce50/FLAG43128267e [2022-02-23 22:47:21,497 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 22:47:21,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2022-02-23 22:47:21,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0ec77aed/57db7e7c3cd842f6b8a6ff2a6a61ce50/FLAG43128267e [2022-02-23 22:47:21,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0ec77aed/57db7e7c3cd842f6b8a6ff2a6a61ce50 [2022-02-23 22:47:21,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 22:47:21,511 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 22:47:21,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 22:47:21,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 22:47:21,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 22:47:21,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:47:21" (1/1) ... [2022-02-23 22:47:21,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50119a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:47:21, skipping insertion in model container [2022-02-23 22:47:21,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:47:21" (1/1) ... [2022-02-23 22:47:21,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 22:47:21,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 22:47:21,669 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2022-02-23 22:47:21,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:47:21,701 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 22:47:21,709 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2022-02-23 22:47:21,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:47:21,736 INFO L208 MainTranslator]: Completed translation [2022-02-23 22:47:21,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:47:21 WrapperNode [2022-02-23 22:47:21,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 22:47:21,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 22:47:21,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 22:47:21,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 22:47:21,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:47:21" (1/1) ... [2022-02-23 22:47:21,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:47:21" (1/1) ... [2022-02-23 22:47:21,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:47:21" (1/1) ... [2022-02-23 22:47:21,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:47:21" (1/1) ... [2022-02-23 22:47:21,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:47:21" (1/1) ... [2022-02-23 22:47:21,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:47:21" (1/1) ... [2022-02-23 22:47:21,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:47:21" (1/1) ... [2022-02-23 22:47:21,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 22:47:21,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 22:47:21,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 22:47:21,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 22:47:21,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:47:21" (1/1) ... [2022-02-23 22:47:21,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:47:21,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:21,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 22:47:21,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 22:47:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 22:47:21,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 22:47:21,837 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 22:47:21,837 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 22:47:21,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 22:47:21,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 22:47:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 22:47:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 22:47:21,838 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 22:47:21,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 22:47:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 22:47:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 22:47:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 22:47:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 22:47:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 22:47:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 22:47:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 22:47:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 22:47:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 22:47:21,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 22:47:21,890 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 22:47:21,892 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 22:47:22,058 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 22:47:22,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 22:47:22,062 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-23 22:47:22,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:47:22 BoogieIcfgContainer [2022-02-23 22:47:22,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 22:47:22,064 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 22:47:22,064 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 22:47:22,065 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 22:47:22,066 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:47:22" (1/1) ... [2022-02-23 22:47:22,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:47:22 BasicIcfg [2022-02-23 22:47:22,082 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 22:47:22,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 22:47:22,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 22:47:22,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 22:47:22,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:47:21" (1/4) ... [2022-02-23 22:47:22,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a9d604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:47:22, skipping insertion in model container [2022-02-23 22:47:22,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:47:21" (2/4) ... [2022-02-23 22:47:22,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a9d604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:47:22, skipping insertion in model container [2022-02-23 22:47:22,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:47:22" (3/4) ... [2022-02-23 22:47:22,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a9d604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:47:22, skipping insertion in model container [2022-02-23 22:47:22,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:47:22" (4/4) ... [2022-02-23 22:47:22,086 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.cqvasr [2022-02-23 22:47:22,089 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 22:47:22,090 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 22:47:22,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 22:47:22,122 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 22:47:22,122 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 22:47:22,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 22:47:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 22:47:22,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:22,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:22,138 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-02-23 22:47:22,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:22,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647896756] [2022-02-23 22:47:22,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:22,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:22,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:47:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:22,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:47:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:22,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 22:47:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:22,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 22:47:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:22,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 22:47:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:47:22,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:22,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647896756] [2022-02-23 22:47:22,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647896756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:47:22,351 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:47:22,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:47:22,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462537749] [2022-02-23 22:47:22,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:47:22,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:47:22,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:22,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:47:22,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:47:22,379 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:47:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:22,454 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-02-23 22:47:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:47:22,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-23 22:47:22,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:22,466 INFO L225 Difference]: With dead ends: 73 [2022-02-23 22:47:22,466 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 22:47:22,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:47:22,470 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:22,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:47:22,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 22:47:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 22:47:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 22:47:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-02-23 22:47:22,496 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-02-23 22:47:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:22,497 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-02-23 22:47:22,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:47:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-02-23 22:47:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 22:47:22,498 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:22,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:22,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 22:47:22,499 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-02-23 22:47:22,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:22,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394809768] [2022-02-23 22:47:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:22,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:22,515 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:22,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222238418] [2022-02-23 22:47:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:22,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:22,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:22,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 22:47:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:22,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:47:22,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 22:47:22,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:47:22,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:22,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394809768] [2022-02-23 22:47:22,699 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:22,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222238418] [2022-02-23 22:47:22,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222238418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:47:22,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:47:22,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 22:47:22,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255296518] [2022-02-23 22:47:22,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:47:22,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 22:47:22,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 22:47:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:47:22,702 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:47:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:22,763 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-02-23 22:47:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:47:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-02-23 22:47:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:22,764 INFO L225 Difference]: With dead ends: 54 [2022-02-23 22:47:22,764 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 22:47:22,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 22:47:22,766 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:22,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:47:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 22:47:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-02-23 22:47:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 22:47:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-23 22:47:22,774 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-02-23 22:47:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:22,774 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-23 22:47:22,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:47:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-23 22:47:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-23 22:47:22,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:22,776 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:22,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 22:47:22,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:22,992 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:22,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:22,993 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-02-23 22:47:22,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:22,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336945043] [2022-02-23 22:47:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:22,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:23,005 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:23,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129092585] [2022-02-23 22:47:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:23,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:23,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:23,007 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:23,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 22:47:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:23,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 22:47:23,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 22:47:23,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:47:23,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:23,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336945043] [2022-02-23 22:47:23,547 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:23,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129092585] [2022-02-23 22:47:23,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129092585] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 22:47:23,548 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:47:23,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-02-23 22:47:23,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741320142] [2022-02-23 22:47:23,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:47:23,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 22:47:23,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:23,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 22:47:23,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:47:23,549 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:47:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:23,609 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-02-23 22:47:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 22:47:23,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-02-23 22:47:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:23,610 INFO L225 Difference]: With dead ends: 53 [2022-02-23 22:47:23,610 INFO L226 Difference]: Without dead ends: 51 [2022-02-23 22:47:23,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-23 22:47:23,611 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:23,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 226 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:47:23,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-23 22:47:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-02-23 22:47:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 22:47:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-02-23 22:47:23,619 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-02-23 22:47:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:23,619 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-02-23 22:47:23,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:47:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-02-23 22:47:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 22:47:23,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:23,620 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:23,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:23,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 22:47:23,835 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:23,835 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-02-23 22:47:23,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:23,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777534503] [2022-02-23 22:47:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:23,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:23,846 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:23,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433105518] [2022-02-23 22:47:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:23,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:23,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:23,847 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:23,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 22:47:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:23,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 22:47:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 22:47:23,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 22:47:24,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:24,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777534503] [2022-02-23 22:47:24,057 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:24,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433105518] [2022-02-23 22:47:24,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433105518] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:47:24,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:47:24,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 22:47:24,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342119705] [2022-02-23 22:47:24,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:47:24,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 22:47:24,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:24,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 22:47:24,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 22:47:24,060 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:47:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:24,207 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-02-23 22:47:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 22:47:24,207 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-02-23 22:47:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:24,211 INFO L225 Difference]: With dead ends: 103 [2022-02-23 22:47:24,211 INFO L226 Difference]: Without dead ends: 96 [2022-02-23 22:47:24,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:47:24,216 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 55 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:24,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 341 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:47:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-23 22:47:24,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-02-23 22:47:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:47:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-02-23 22:47:24,237 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-02-23 22:47:24,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:24,237 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-02-23 22:47:24,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:47:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-02-23 22:47:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 22:47:24,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:24,243 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:24,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:24,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:24,460 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:24,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-02-23 22:47:24,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:24,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133010436] [2022-02-23 22:47:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:24,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:24,473 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:24,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378812679] [2022-02-23 22:47:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:24,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:24,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:24,475 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:24,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 22:47:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:24,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 22:47:24,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 22:47:24,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:24,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:24,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133010436] [2022-02-23 22:47:24,753 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:24,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378812679] [2022-02-23 22:47:24,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378812679] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:47:24,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:47:24,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 22:47:24,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296255527] [2022-02-23 22:47:24,753 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 22:47:24,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 22:47:24,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:24,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 22:47:24,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-23 22:47:24,755 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 22:47:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:24,831 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-02-23 22:47:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 22:47:24,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-02-23 22:47:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:24,832 INFO L225 Difference]: With dead ends: 79 [2022-02-23 22:47:24,832 INFO L226 Difference]: Without dead ends: 77 [2022-02-23 22:47:24,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:47:24,833 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:24,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 201 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:47:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-23 22:47:24,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-02-23 22:47:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 22:47:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-02-23 22:47:24,842 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-02-23 22:47:24,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:24,843 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-02-23 22:47:24,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 22:47:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-02-23 22:47:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 22:47:24,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:24,844 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:24,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:25,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:25,060 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-02-23 22:47:25,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:25,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182877875] [2022-02-23 22:47:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:25,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:25,069 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:25,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600653137] [2022-02-23 22:47:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:25,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:25,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:25,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 22:47:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:25,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-23 22:47:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 22:47:25,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:47:25,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:25,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182877875] [2022-02-23 22:47:25,521 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:25,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600653137] [2022-02-23 22:47:25,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600653137] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:47:25,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:47:25,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-02-23 22:47:25,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276659656] [2022-02-23 22:47:25,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:47:25,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 22:47:25,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:25,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 22:47:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-23 22:47:25,522 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 22:47:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:25,880 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-02-23 22:47:25,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 22:47:25,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-02-23 22:47:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:25,881 INFO L225 Difference]: With dead ends: 118 [2022-02-23 22:47:25,881 INFO L226 Difference]: Without dead ends: 116 [2022-02-23 22:47:25,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-02-23 22:47:25,882 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 103 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:25,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 347 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:47:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-23 22:47:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-02-23 22:47:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-23 22:47:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-02-23 22:47:25,898 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-02-23 22:47:25,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:25,898 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-02-23 22:47:25,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 22:47:25,898 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-02-23 22:47:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 22:47:25,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:25,899 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:25,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:26,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:26,116 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-02-23 22:47:26,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:26,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539751338] [2022-02-23 22:47:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:26,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:26,125 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:26,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395021130] [2022-02-23 22:47:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:26,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:26,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:26,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:26,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 22:47:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:26,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:47:26,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 22:47:26,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:47:26,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:26,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539751338] [2022-02-23 22:47:26,239 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:26,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395021130] [2022-02-23 22:47:26,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395021130] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:47:26,239 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:47:26,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:47:26,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700240800] [2022-02-23 22:47:26,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:47:26,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:47:26,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:26,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:47:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:47:26,240 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 22:47:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:26,288 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-02-23 22:47:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:47:26,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-02-23 22:47:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:26,292 INFO L225 Difference]: With dead ends: 151 [2022-02-23 22:47:26,292 INFO L226 Difference]: Without dead ends: 149 [2022-02-23 22:47:26,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:47:26,293 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:26,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:47:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-23 22:47:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-02-23 22:47:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-23 22:47:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-02-23 22:47:26,322 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-02-23 22:47:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:26,324 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-02-23 22:47:26,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 22:47:26,324 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-02-23 22:47:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 22:47:26,328 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:26,328 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:26,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:26,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:26,535 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:26,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:26,536 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-02-23 22:47:26,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:26,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126736838] [2022-02-23 22:47:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:26,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:26,544 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:26,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655836022] [2022-02-23 22:47:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:26,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:26,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:26,545 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:26,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 22:47:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:26,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-23 22:47:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 22:47:26,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:47:27,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:27,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126736838] [2022-02-23 22:47:27,092 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:27,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655836022] [2022-02-23 22:47:27,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655836022] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:47:27,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:47:27,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 18 [2022-02-23 22:47:27,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818080973] [2022-02-23 22:47:27,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:47:27,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 22:47:27,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:27,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 22:47:27,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-23 22:47:27,093 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-23 22:47:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:29,465 INFO L93 Difference]: Finished difference Result 190 states and 265 transitions. [2022-02-23 22:47:29,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 22:47:29,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2022-02-23 22:47:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:29,467 INFO L225 Difference]: With dead ends: 190 [2022-02-23 22:47:29,467 INFO L226 Difference]: Without dead ends: 188 [2022-02-23 22:47:29,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-02-23 22:47:29,468 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 130 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:29,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 358 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 22:47:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-23 22:47:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-02-23 22:47:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 118 states have internal predecessors, (142), 56 states have call successors, (56), 10 states have call predecessors, (56), 9 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-02-23 22:47:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 252 transitions. [2022-02-23 22:47:29,496 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 252 transitions. Word has length 47 [2022-02-23 22:47:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:29,496 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 252 transitions. [2022-02-23 22:47:29,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-23 22:47:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 252 transitions. [2022-02-23 22:47:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 22:47:29,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:29,497 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:29,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:29,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:29,713 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:29,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:29,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-02-23 22:47:29,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:29,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932486077] [2022-02-23 22:47:29,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:29,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:29,727 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:29,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191804301] [2022-02-23 22:47:29,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:47:29,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:29,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:29,733 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:29,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 22:47:29,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:47:29,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:47:29,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 22:47:29,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:47:29,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:47:29,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:29,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932486077] [2022-02-23 22:47:29,822 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:29,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191804301] [2022-02-23 22:47:29,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191804301] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:47:29,823 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:47:29,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:47:29,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234477736] [2022-02-23 22:47:29,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:47:29,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:47:29,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:29,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:47:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:47:29,824 INFO L87 Difference]: Start difference. First operand 179 states and 252 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:47:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:29,899 INFO L93 Difference]: Finished difference Result 225 states and 312 transitions. [2022-02-23 22:47:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:47:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-02-23 22:47:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:29,902 INFO L225 Difference]: With dead ends: 225 [2022-02-23 22:47:29,902 INFO L226 Difference]: Without dead ends: 144 [2022-02-23 22:47:29,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:47:29,906 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:29,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:47:29,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-23 22:47:29,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-02-23 22:47:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 38 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-23 22:47:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-02-23 22:47:29,928 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 47 [2022-02-23 22:47:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:29,929 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-02-23 22:47:29,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:47:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-02-23 22:47:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-23 22:47:29,930 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:29,930 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:29,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:30,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 22:47:30,146 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-02-23 22:47:30,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:30,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121620118] [2022-02-23 22:47:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:30,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:30,161 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:30,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563501267] [2022-02-23 22:47:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:30,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:30,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:30,164 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:30,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 22:47:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:47:30,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 22:47:30,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:47:30,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:30,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121620118] [2022-02-23 22:47:30,281 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:30,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563501267] [2022-02-23 22:47:30,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563501267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:47:30,281 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:47:30,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:47:30,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522048686] [2022-02-23 22:47:30,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:47:30,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:47:30,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:30,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:47:30,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:47:30,283 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-23 22:47:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:30,326 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2022-02-23 22:47:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:47:30,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-02-23 22:47:30,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:30,328 INFO L225 Difference]: With dead ends: 167 [2022-02-23 22:47:30,328 INFO L226 Difference]: Without dead ends: 165 [2022-02-23 22:47:30,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:47:30,328 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:30,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:47:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-23 22:47:30,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-02-23 22:47:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-02-23 22:47:30,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-02-23 22:47:30,349 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-02-23 22:47:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:30,349 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-02-23 22:47:30,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-23 22:47:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-02-23 22:47:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-23 22:47:30,349 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:30,350 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:30,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:30,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 22:47:30,564 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-02-23 22:47:30,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:30,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579983613] [2022-02-23 22:47:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:30,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:30,571 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:30,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871647462] [2022-02-23 22:47:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:30,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:30,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:30,573 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:30,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 22:47:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-23 22:47:30,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-02-23 22:47:30,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-02-23 22:47:31,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:31,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579983613] [2022-02-23 22:47:31,253 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:31,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871647462] [2022-02-23 22:47:31,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871647462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:47:31,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:47:31,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-23 22:47:31,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263983566] [2022-02-23 22:47:31,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:47:31,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 22:47:31,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 22:47:31,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-23 22:47:31,254 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 22:47:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:33,950 INFO L93 Difference]: Finished difference Result 331 states and 487 transitions. [2022-02-23 22:47:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-23 22:47:33,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 64 [2022-02-23 22:47:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:33,954 INFO L225 Difference]: With dead ends: 331 [2022-02-23 22:47:33,954 INFO L226 Difference]: Without dead ends: 326 [2022-02-23 22:47:33,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-02-23 22:47:33,956 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 143 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:33,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 586 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-23 22:47:33,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-23 22:47:34,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 250. [2022-02-23 22:47:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 153 states have internal predecessors, (175), 89 states have call successors, (89), 15 states have call predecessors, (89), 14 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-02-23 22:47:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 351 transitions. [2022-02-23 22:47:34,010 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 351 transitions. Word has length 64 [2022-02-23 22:47:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:34,010 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 351 transitions. [2022-02-23 22:47:34,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 22:47:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 351 transitions. [2022-02-23 22:47:34,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-23 22:47:34,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:34,011 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:34,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:34,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 22:47:34,219 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:34,220 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-02-23 22:47:34,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:34,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195096269] [2022-02-23 22:47:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:34,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:34,227 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:34,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001088750] [2022-02-23 22:47:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:34,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:34,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:34,229 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:34,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 22:47:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:34,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-23 22:47:34,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-02-23 22:47:34,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-02-23 22:47:34,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:34,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195096269] [2022-02-23 22:47:34,760 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:34,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001088750] [2022-02-23 22:47:34,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001088750] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 22:47:34,760 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:47:34,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2022-02-23 22:47:34,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546469138] [2022-02-23 22:47:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:47:34,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 22:47:34,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 22:47:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:47:34,761 INFO L87 Difference]: Start difference. First operand 250 states and 351 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-23 22:47:34,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:34,838 INFO L93 Difference]: Finished difference Result 256 states and 356 transitions. [2022-02-23 22:47:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:47:34,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-02-23 22:47:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:34,841 INFO L225 Difference]: With dead ends: 256 [2022-02-23 22:47:34,841 INFO L226 Difference]: Without dead ends: 254 [2022-02-23 22:47:34,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-02-23 22:47:34,841 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:34,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 145 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:47:34,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-23 22:47:34,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-02-23 22:47:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 156 states have internal predecessors, (178), 89 states have call successors, (89), 16 states have call predecessors, (89), 15 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-02-23 22:47:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2022-02-23 22:47:34,897 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 74 [2022-02-23 22:47:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:34,897 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2022-02-23 22:47:34,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-23 22:47:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2022-02-23 22:47:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-23 22:47:34,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:34,898 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:34,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:35,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 22:47:35,115 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:35,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-02-23 22:47:35,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:35,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28755087] [2022-02-23 22:47:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:35,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:35,130 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:35,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985242277] [2022-02-23 22:47:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:35,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:35,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:35,136 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:35,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 22:47:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:35,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 22:47:35,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-02-23 22:47:35,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-02-23 22:47:35,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:35,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28755087] [2022-02-23 22:47:35,521 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:35,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985242277] [2022-02-23 22:47:35,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985242277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:47:35,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:47:35,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-23 22:47:35,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004383007] [2022-02-23 22:47:35,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:47:35,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 22:47:35,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 22:47:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-02-23 22:47:35,522 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-23 22:47:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:35,813 INFO L93 Difference]: Finished difference Result 363 states and 502 transitions. [2022-02-23 22:47:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 22:47:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 72 [2022-02-23 22:47:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:35,815 INFO L225 Difference]: With dead ends: 363 [2022-02-23 22:47:35,815 INFO L226 Difference]: Without dead ends: 244 [2022-02-23 22:47:35,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-02-23 22:47:35,816 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 77 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:35,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 355 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:47:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-23 22:47:35,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 229. [2022-02-23 22:47:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 128 states have (on average 1.171875) internal successors, (150), 134 states have internal predecessors, (150), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-23 22:47:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 318 transitions. [2022-02-23 22:47:35,864 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 318 transitions. Word has length 72 [2022-02-23 22:47:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:35,864 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 318 transitions. [2022-02-23 22:47:35,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-23 22:47:35,864 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 318 transitions. [2022-02-23 22:47:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 22:47:35,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:35,869 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:35,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:36,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 22:47:36,079 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:36,080 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-02-23 22:47:36,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:36,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038750673] [2022-02-23 22:47:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:36,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:36,093 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:36,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550818474] [2022-02-23 22:47:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:36,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:36,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:36,102 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:47:36,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 22:47:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:36,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 75 conjunts are in the unsatisfiable core [2022-02-23 22:47:36,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-02-23 22:47:36,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-02-23 22:47:38,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:38,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038750673] [2022-02-23 22:47:38,338 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:38,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550818474] [2022-02-23 22:47:38,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550818474] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:47:38,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:47:38,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2022-02-23 22:47:38,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854051096] [2022-02-23 22:47:38,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:47:38,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-23 22:47:38,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-23 22:47:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-02-23 22:47:38,339 INFO L87 Difference]: Start difference. First operand 229 states and 318 transitions. Second operand has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 22:47:53,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:47:57,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:48:04,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:48:07,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:48:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:07,668 INFO L93 Difference]: Finished difference Result 428 states and 624 transitions. [2022-02-23 22:48:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-23 22:48:07,671 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2022-02-23 22:48:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:07,675 INFO L225 Difference]: With dead ends: 428 [2022-02-23 22:48:07,675 INFO L226 Difference]: Without dead ends: 423 [2022-02-23 22:48:07,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1214, Invalid=4792, Unknown=0, NotChecked=0, Total=6006 [2022-02-23 22:48:07,677 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 216 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 590 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:07,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 790 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 1642 Invalid, 2 Unknown, 0 Unchecked, 20.5s Time] [2022-02-23 22:48:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-02-23 22:48:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 351. [2022-02-23 22:48:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 191 states have (on average 1.1727748691099475) internal successors, (224), 200 states have internal predecessors, (224), 139 states have call successors, (139), 21 states have call predecessors, (139), 20 states have return successors, (137), 129 states have call predecessors, (137), 137 states have call successors, (137) [2022-02-23 22:48:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 500 transitions. [2022-02-23 22:48:07,803 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 500 transitions. Word has length 91 [2022-02-23 22:48:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:07,803 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 500 transitions. [2022-02-23 22:48:07,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 22:48:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 500 transitions. [2022-02-23 22:48:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 22:48:07,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:48:07,804 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:48:07,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 22:48:08,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 22:48:08,006 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:48:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:48:08,007 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-02-23 22:48:08,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:48:08,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759552927] [2022-02-23 22:48:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:08,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:48:08,013 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:48:08,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787164900] [2022-02-23 22:48:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:08,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:08,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:48:08,014 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:48:08,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 22:48:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:48:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 22:48:08,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:48:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 90 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-02-23 22:48:08,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:48:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-02-23 22:48:08,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:48:08,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759552927] [2022-02-23 22:48:08,552 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:48:08,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787164900] [2022-02-23 22:48:08,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787164900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:48:08,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:48:08,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-02-23 22:48:08,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218290150] [2022-02-23 22:48:08,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:48:08,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 22:48:08,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:48:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 22:48:08,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-23 22:48:08,553 INFO L87 Difference]: Start difference. First operand 351 states and 500 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-02-23 22:48:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:08,981 INFO L93 Difference]: Finished difference Result 570 states and 802 transitions. [2022-02-23 22:48:08,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-23 22:48:08,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 94 [2022-02-23 22:48:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:08,983 INFO L225 Difference]: With dead ends: 570 [2022-02-23 22:48:08,983 INFO L226 Difference]: Without dead ends: 350 [2022-02-23 22:48:08,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2022-02-23 22:48:08,984 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:08,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 459 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:48:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-23 22:48:09,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 341. [2022-02-23 22:48:09,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 197 states have (on average 1.1776649746192893) internal successors, (232), 198 states have internal predecessors, (232), 123 states have call successors, (123), 21 states have call predecessors, (123), 20 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-02-23 22:48:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 476 transitions. [2022-02-23 22:48:09,108 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 476 transitions. Word has length 94 [2022-02-23 22:48:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:09,109 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 476 transitions. [2022-02-23 22:48:09,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-02-23 22:48:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 476 transitions. [2022-02-23 22:48:09,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 22:48:09,110 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:48:09,110 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:48:09,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 22:48:09,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:09,318 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:48:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:48:09,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-02-23 22:48:09,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:48:09,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87127279] [2022-02-23 22:48:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:09,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:48:09,325 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:48:09,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188656672] [2022-02-23 22:48:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:09,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:09,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:48:09,326 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:48:09,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 22:48:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:48:09,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 22:48:09,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:48:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 58 proven. 19 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-02-23 22:48:09,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:48:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-02-23 22:48:10,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:48:10,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87127279] [2022-02-23 22:48:10,055 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:48:10,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188656672] [2022-02-23 22:48:10,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188656672] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:48:10,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:48:10,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-02-23 22:48:10,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512497718] [2022-02-23 22:48:10,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:48:10,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 22:48:10,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:48:10,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 22:48:10,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-23 22:48:10,056 INFO L87 Difference]: Start difference. First operand 341 states and 476 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-02-23 22:48:10,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:10,815 INFO L93 Difference]: Finished difference Result 474 states and 665 transitions. [2022-02-23 22:48:10,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-23 22:48:10,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 94 [2022-02-23 22:48:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:10,817 INFO L225 Difference]: With dead ends: 474 [2022-02-23 22:48:10,817 INFO L226 Difference]: Without dead ends: 303 [2022-02-23 22:48:10,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=1081, Unknown=0, NotChecked=0, Total=1406 [2022-02-23 22:48:10,818 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 74 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:10,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 400 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 256 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-02-23 22:48:10,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-23 22:48:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-02-23 22:48:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 171 states have internal predecessors, (198), 115 states have call successors, (115), 18 states have call predecessors, (115), 17 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-02-23 22:48:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 426 transitions. [2022-02-23 22:48:10,932 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 426 transitions. Word has length 94 [2022-02-23 22:48:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:10,933 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 426 transitions. [2022-02-23 22:48:10,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-02-23 22:48:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 426 transitions. [2022-02-23 22:48:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-23 22:48:10,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:48:10,934 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:48:10,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 22:48:11,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 22:48:11,147 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:48:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:48:11,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2002100640, now seen corresponding path program 2 times [2022-02-23 22:48:11,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:48:11,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930133238] [2022-02-23 22:48:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:11,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:48:11,154 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:48:11,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868808988] [2022-02-23 22:48:11,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:48:11,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:11,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:48:11,156 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:48:11,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 22:48:11,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:48:11,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:48:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 22:48:11,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:48:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 46 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-02-23 22:48:11,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:48:13,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:48:13,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930133238] [2022-02-23 22:48:13,614 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:48:13,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868808988] [2022-02-23 22:48:13,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868808988] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:48:13,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:48:13,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-02-23 22:48:13,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093908115] [2022-02-23 22:48:13,615 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 22:48:13,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 22:48:13,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:48:13,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 22:48:13,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-23 22:48:13,617 INFO L87 Difference]: Start difference. First operand 303 states and 426 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-23 22:48:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:14,111 INFO L93 Difference]: Finished difference Result 464 states and 667 transitions. [2022-02-23 22:48:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 22:48:14,111 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2022-02-23 22:48:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:14,113 INFO L225 Difference]: With dead ends: 464 [2022-02-23 22:48:14,113 INFO L226 Difference]: Without dead ends: 383 [2022-02-23 22:48:14,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-02-23 22:48:14,114 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 54 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:14,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 455 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:48:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-23 22:48:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 327. [2022-02-23 22:48:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 186 states have (on average 1.1612903225806452) internal successors, (216), 187 states have internal predecessors, (216), 123 states have call successors, (123), 18 states have call predecessors, (123), 17 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-02-23 22:48:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 460 transitions. [2022-02-23 22:48:14,237 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 460 transitions. Word has length 116 [2022-02-23 22:48:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:14,237 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 460 transitions. [2022-02-23 22:48:14,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-23 22:48:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 460 transitions. [2022-02-23 22:48:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-23 22:48:14,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:48:14,239 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:48:14,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-23 22:48:14,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-23 22:48:14,460 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:48:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:48:14,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1586140833, now seen corresponding path program 3 times [2022-02-23 22:48:14,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:48:14,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786208381] [2022-02-23 22:48:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:14,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:48:14,469 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:48:14,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470991038] [2022-02-23 22:48:14,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 22:48:14,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:14,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:48:14,471 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:48:14,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 22:48:14,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 22:48:14,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:48:14,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 22:48:14,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:48:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-02-23 22:48:15,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:48:16,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:48:16,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786208381] [2022-02-23 22:48:16,730 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:48:16,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470991038] [2022-02-23 22:48:16,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470991038] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:48:16,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:48:16,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-02-23 22:48:16,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949632780] [2022-02-23 22:48:16,730 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 22:48:16,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 22:48:16,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:48:16,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 22:48:16,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-02-23 22:48:16,731 INFO L87 Difference]: Start difference. First operand 327 states and 460 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-02-23 22:48:18,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:18,381 INFO L93 Difference]: Finished difference Result 412 states and 577 transitions. [2022-02-23 22:48:18,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-23 22:48:18,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 121 [2022-02-23 22:48:18,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:18,383 INFO L225 Difference]: With dead ends: 412 [2022-02-23 22:48:18,383 INFO L226 Difference]: Without dead ends: 410 [2022-02-23 22:48:18,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2022-02-23 22:48:18,384 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 99 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:18,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 448 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-23 22:48:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-23 22:48:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 339. [2022-02-23 22:48:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 195 states have (on average 1.1538461538461537) internal successors, (225), 196 states have internal predecessors, (225), 123 states have call successors, (123), 21 states have call predecessors, (123), 20 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-02-23 22:48:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 469 transitions. [2022-02-23 22:48:18,504 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 469 transitions. Word has length 121 [2022-02-23 22:48:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:18,504 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 469 transitions. [2022-02-23 22:48:18,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-02-23 22:48:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 469 transitions. [2022-02-23 22:48:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-23 22:48:18,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:48:18,505 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:48:18,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-23 22:48:18,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 22:48:18,721 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:48:18,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:48:18,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1478543105, now seen corresponding path program 4 times [2022-02-23 22:48:18,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:48:18,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176568749] [2022-02-23 22:48:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:18,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:48:18,728 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:48:18,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471985447] [2022-02-23 22:48:18,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 22:48:18,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:18,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:48:18,731 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:48:18,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-23 22:48:18,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 22:48:18,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:48:18,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 22:48:18,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:48:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 183 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-02-23 22:48:19,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:48:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 61 proven. 20 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-02-23 22:48:19,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:48:19,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176568749] [2022-02-23 22:48:19,327 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:48:19,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471985447] [2022-02-23 22:48:19,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471985447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:48:19,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:48:19,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-02-23 22:48:19,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807965090] [2022-02-23 22:48:19,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:48:19,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 22:48:19,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:48:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 22:48:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-02-23 22:48:19,328 INFO L87 Difference]: Start difference. First operand 339 states and 469 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-02-23 22:48:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:19,717 INFO L93 Difference]: Finished difference Result 433 states and 581 transitions. [2022-02-23 22:48:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 22:48:19,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 119 [2022-02-23 22:48:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:19,719 INFO L225 Difference]: With dead ends: 433 [2022-02-23 22:48:19,719 INFO L226 Difference]: Without dead ends: 229 [2022-02-23 22:48:19,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-02-23 22:48:19,720 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 45 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:19,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 477 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:48:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-23 22:48:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2022-02-23 22:48:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 137 states have internal predecessors, (142), 71 states have call successors, (71), 19 states have call predecessors, (71), 18 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-02-23 22:48:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 282 transitions. [2022-02-23 22:48:19,788 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 282 transitions. Word has length 119 [2022-02-23 22:48:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:19,788 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 282 transitions. [2022-02-23 22:48:19,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-02-23 22:48:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 282 transitions. [2022-02-23 22:48:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-23 22:48:19,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:48:19,789 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:48:19,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-02-23 22:48:20,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:20,003 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:48:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:48:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2145578717, now seen corresponding path program 5 times [2022-02-23 22:48:20,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:48:20,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423635653] [2022-02-23 22:48:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:20,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:48:20,010 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:48:20,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736542276] [2022-02-23 22:48:20,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 22:48:20,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:20,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:48:20,011 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:48:20,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-23 22:48:20,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-23 22:48:20,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:48:20,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-23 22:48:20,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:48:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 63 proven. 68 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-02-23 22:48:20,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:48:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 58 proven. 73 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-02-23 22:48:21,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:48:21,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423635653] [2022-02-23 22:48:21,395 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:48:21,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736542276] [2022-02-23 22:48:21,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736542276] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:48:21,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:48:21,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2022-02-23 22:48:21,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790575719] [2022-02-23 22:48:21,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:48:21,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-23 22:48:21,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:48:21,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-23 22:48:21,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-23 22:48:21,398 INFO L87 Difference]: Start difference. First operand 226 states and 282 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 29 states have internal predecessors, (85), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2022-02-23 22:48:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:22,176 INFO L93 Difference]: Finished difference Result 258 states and 308 transitions. [2022-02-23 22:48:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 22:48:22,176 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 29 states have internal predecessors, (85), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) Word has length 146 [2022-02-23 22:48:22,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:22,177 INFO L225 Difference]: With dead ends: 258 [2022-02-23 22:48:22,177 INFO L226 Difference]: Without dead ends: 89 [2022-02-23 22:48:22,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=371, Invalid=1521, Unknown=0, NotChecked=0, Total=1892 [2022-02-23 22:48:22,178 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 85 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:22,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 608 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 22:48:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-23 22:48:22,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-02-23 22:48:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 28 states have call successors, (28), 10 states have call predecessors, (28), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-23 22:48:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-02-23 22:48:22,214 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 146 [2022-02-23 22:48:22,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:22,215 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-02-23 22:48:22,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 29 states have internal predecessors, (85), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2022-02-23 22:48:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-02-23 22:48:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-23 22:48:22,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:48:22,216 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:48:22,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-23 22:48:22,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:22,416 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:48:22,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:48:22,416 INFO L85 PathProgramCache]: Analyzing trace with hash -586103770, now seen corresponding path program 6 times [2022-02-23 22:48:22,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:48:22,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10199150] [2022-02-23 22:48:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:22,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:48:22,422 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:48:22,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697470888] [2022-02-23 22:48:22,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 22:48:22,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:22,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:48:22,424 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:48:22,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-23 22:48:22,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-23 22:48:22,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:48:22,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 22:48:22,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:48:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2022-02-23 22:48:22,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:48:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 79 proven. 37 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2022-02-23 22:48:23,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:48:23,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10199150] [2022-02-23 22:48:23,363 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:48:23,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697470888] [2022-02-23 22:48:23,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697470888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:48:23,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:48:23,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-02-23 22:48:23,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591324029] [2022-02-23 22:48:23,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:48:23,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 22:48:23,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:48:23,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 22:48:23,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-02-23 22:48:23,364 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2022-02-23 22:48:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:23,678 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2022-02-23 22:48:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 22:48:23,678 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 160 [2022-02-23 22:48:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:23,679 INFO L225 Difference]: With dead ends: 89 [2022-02-23 22:48:23,679 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 22:48:23,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-02-23 22:48:23,680 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 48 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:23,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 341 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:48:23,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 22:48:23,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 22:48:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 22:48:23,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 22:48:23,681 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2022-02-23 22:48:23,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:23,681 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 22:48:23,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2022-02-23 22:48:23,681 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 22:48:23,681 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 22:48:23,683 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 22:48:23,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-02-23 22:48:23,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-23 22:48:23,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-23 22:48:39,252 WARN L232 SmtUtils]: Spent 12.81s on a formula simplification. DAG size of input: 153 DAG size of output: 68 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-23 22:48:53,882 WARN L232 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 230 DAG size of output: 86 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-23 22:49:00,668 WARN L232 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 230 DAG size of output: 63 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-23 22:49:07,507 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-23 22:49:07,507 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-23 22:49:07,507 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-23 22:49:07,507 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-23 22:49:07,508 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-23 22:49:07,508 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-23 22:49:07,508 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-23 22:49:07,508 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-02-23 22:49:07,508 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-02-23 22:49:07,508 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-02-23 22:49:07,508 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-02-23 22:49:07,508 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2022-02-23 22:49:07,508 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-02-23 22:49:07,508 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-02-23 22:49:07,508 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-02-23 22:49:07,508 INFO L854 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 2) (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-02-23 22:49:07,508 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~y~0 2) (<= main_~x~0 2)) [2022-02-23 22:49:07,508 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-02-23 22:49:07,508 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse8 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse1 (<= 1 main_~x~0)) (.cse3 (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) .cse8)) (.cse0 (div (+ 2 (* (- 1) main_~b~0)) 2)) (.cse2 (<= main_~y~0 2)) (.cse4 (= main_~a~0 .cse8)) (.cse7 (<= 1 main_~a~0)) (.cse5 (<= 1 main_~y~0)) (.cse6 (<= main_~x~0 2))) (or (and (< main_~b~0 main_~a~0) (< main_~b~0 .cse0) .cse1 .cse2 (< main_~c~0 (div (+ (* (- 1) main_~c~0) 2) 2)) .cse3 .cse4 (<= 0 main_~c~0) (<= 0 main_~b~0) .cse5 .cse6) (and (= main_~s~0 0) (= main_~p~0 0) (= main_~k~0 0) (= main_~r~0 1) (= main_~a~0 main_~y~0) (= main_~b~0 main_~x~0) (<= main_~c~0 2) (<= main_~b~0 main_~c~0) (< main_~x~0 main_~a~0) (<= main_~a~0 2) (<= 1 main_~b~0) (= main_~q~0 1)) (and .cse1 .cse2 .cse3 .cse7 (<= main_~a~0 .cse0) (<= main_~c~0 (+ (div (+ main_~b~0 (- 4)) 2) 2)) (= main_~c~0 0) .cse5 .cse6) (and .cse2 (= main_~s~0 1) .cse4 .cse7 (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse5 (= main_~a~0 main_~x~0) .cse6 (= main_~p~0 1))))) [2022-02-23 22:49:07,508 INFO L854 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (and (< main_~b~0 main_~a~0) (<= 1 main_~x~0) (<= main_~y~0 2) (= (+ (* main_~q~0 main_~x~0) main_~a~0 (* main_~y~0 main_~s~0)) .cse0) (<= main_~b~0 main_~c~0) (or (= main_~b~0 0) (= main_~a~0 .cse0)) (<= 1 main_~y~0))) [2022-02-23 22:49:07,509 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2022-02-23 22:49:07,509 INFO L858 garLoopResultBuilder]: For program point L74(line 74) no Hoare annotation was computed. [2022-02-23 22:49:07,509 INFO L854 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse8 (* main_~y~0 main_~r~0)) (.cse9 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse5 (<= main_~a~0 2)) (.cse4 (<= main_~y~0 2)) (.cse16 (= main_~k~0 0)) (.cse10 (= main_~s~0 1)) (.cse11 (= main_~a~0 (+ .cse8 .cse9))) (.cse12 (= main_~b~0 main_~y~0)) (.cse13 (= main_~q~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse14 (= main_~a~0 main_~x~0)) (.cse7 (<= main_~x~0 2)) (.cse15 (= main_~p~0 1))) (or (let ((.cse1 (+ .cse8 main_~b~0 .cse9)) (.cse2 (* main_~q~0 main_~x~0)) (.cse3 (* main_~y~0 main_~s~0))) (and (< main_~b~0 main_~a~0) .cse0 (= .cse1 (+ (* .cse2 3) (* 3 .cse3))) (= .cse1 (+ .cse2 (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0) .cse3)) (= main_~b~0 (+ .cse2 .cse3)) (<= 1 main_~x~0) .cse4 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0) (< (div (+ (- 1) (* (- 1) main_~c~0)) (- 2)) (+ main_~b~0 1)) .cse5 (= main_~c~0 0) .cse6 .cse7)) (and .cse0 (= main_~x~0 (+ main_~c~0 main_~b~0)) .cse10 .cse11 (<= 0 main_~c~0) .cse12 (= main_~k~0 1) (not (<= main_~b~0 main_~c~0)) .cse13 .cse14 .cse7 .cse15) (and (= main_~s~0 0) (= main_~p~0 0) .cse16 (= main_~r~0 1) (= main_~a~0 main_~y~0) (< main_~b~0 main_~c~0) (= main_~b~0 main_~x~0) (<= main_~c~0 2) (< main_~x~0 main_~a~0) .cse5 (<= 1 main_~b~0) (= main_~q~0 1)) (and .cse4 .cse16 .cse10 .cse11 (<= 1 main_~a~0) .cse12 .cse13 .cse6 .cse14 (= main_~c~0 main_~x~0) .cse7 .cse15)))) [2022-02-23 22:49:07,509 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2022-02-23 22:49:07,509 INFO L858 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2022-02-23 22:49:07,509 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2022-02-23 22:49:07,509 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2022-02-23 22:49:07,509 INFO L854 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse11 (div main_~c~0 2)) (.cse7 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0)) (.cse9 (<= main_~a~0 2)) (.cse13 (= main_~s~0 1)) (.cse14 (= main_~b~0 main_~y~0)) (.cse15 (= main_~q~0 0)) (.cse16 (<= main_~x~0 main_~a~0)) (.cse17 (= main_~a~0 main_~x~0)) (.cse18 (= main_~c~0 main_~x~0)) (.cse19 (= main_~p~0 1)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse8 (< main_~b~0 main_~c~0)) (.cse20 (= main_~d~0 1)) (.cse10 (<= 1 main_~y~0)) (.cse12 (<= main_~x~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (<= main_~b~0 (div .cse11 2)) .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 (<= main_~b~0 .cse11) .cse6 .cse7 .cse14 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 (<= main_~b~0 (div main_~v~0 2)) .cse10 .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 .cse6 .cse14 (<= main_~b~0 main_~c~0) .cse20 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= main_~r~0 1) (= main_~a~0 main_~y~0) .cse8 .cse20 (<= 0 main_~b~0) (= main_~q~0 1) .cse10 .cse12))) [2022-02-23 22:49:07,509 INFO L858 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2022-02-23 22:49:07,509 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse11 (div main_~c~0 2)) (.cse7 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0)) (.cse9 (<= main_~a~0 2)) (.cse13 (= main_~s~0 1)) (.cse14 (= main_~b~0 main_~y~0)) (.cse15 (= main_~q~0 0)) (.cse16 (<= main_~x~0 main_~a~0)) (.cse17 (= main_~a~0 main_~x~0)) (.cse18 (= main_~c~0 main_~x~0)) (.cse19 (= main_~p~0 1)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse8 (< main_~b~0 main_~c~0)) (.cse20 (= main_~d~0 1)) (.cse10 (<= 1 main_~y~0)) (.cse12 (<= main_~x~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (<= main_~b~0 (div .cse11 2)) .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 (<= main_~b~0 .cse11) .cse6 .cse7 .cse14 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 (<= main_~b~0 (div main_~v~0 2)) .cse10 .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 .cse6 .cse14 (<= main_~b~0 main_~c~0) .cse20 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= main_~r~0 1) (= main_~a~0 main_~y~0) .cse8 .cse20 (<= 0 main_~b~0) (= main_~q~0 1) .cse10 .cse12))) [2022-02-23 22:49:07,509 INFO L854 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse11 (div main_~c~0 2)) (.cse7 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0)) (.cse9 (<= main_~a~0 2)) (.cse13 (= main_~s~0 1)) (.cse14 (= main_~b~0 main_~y~0)) (.cse15 (= main_~q~0 0)) (.cse16 (<= main_~x~0 main_~a~0)) (.cse17 (= main_~a~0 main_~x~0)) (.cse18 (= main_~c~0 main_~x~0)) (.cse19 (= main_~p~0 1)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse8 (< main_~b~0 main_~c~0)) (.cse20 (= main_~d~0 1)) (.cse10 (<= 1 main_~y~0)) (.cse12 (<= main_~x~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (<= main_~b~0 (div .cse11 2)) .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 (<= main_~b~0 .cse11) .cse6 .cse7 .cse14 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 (<= main_~b~0 (div main_~v~0 2)) .cse10 .cse12) (and .cse0 .cse3 .cse4 .cse5 .cse13 .cse6 .cse14 (<= main_~b~0 main_~c~0) .cse20 .cse15 .cse16 .cse10 .cse17 .cse18 .cse12 .cse19) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (= main_~r~0 1) (= main_~a~0 main_~y~0) .cse8 .cse20 (<= 0 main_~b~0) (= main_~q~0 1) .cse10 .cse12))) [2022-02-23 22:49:07,509 INFO L854 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse13 (div main_~c~0 2)) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse12 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0)) (.cse7 (< main_~b~0 main_~c~0)) (.cse9 (<= main_~a~0 2)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse14 (= main_~s~0 1)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse15 (= main_~b~0 main_~y~0)) (.cse8 (= main_~d~0 1)) (.cse16 (= main_~q~0 0)) (.cse17 (<= main_~x~0 main_~a~0)) (.cse10 (<= 1 main_~y~0)) (.cse18 (= main_~a~0 main_~x~0)) (.cse19 (= main_~c~0 main_~x~0)) (.cse11 (<= main_~x~0 2)) (.cse20 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse12 .cse7 .cse9 .cse10 (<= main_~b~0 (div .cse13 2)) .cse11) (and .cse0 .cse3 .cse4 .cse5 .cse14 (<= main_~b~0 .cse13) .cse6 .cse12 .cse15 .cse16 .cse17 .cse10 .cse18 .cse19 .cse11 .cse20) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse12 .cse7 .cse9 (<= main_~b~0 (div main_~v~0 2)) .cse10 .cse11) (and .cse0 .cse3 .cse4 .cse5 .cse14 .cse6 .cse15 (<= main_~b~0 main_~c~0) .cse8 .cse16 .cse17 .cse10 .cse18 .cse19 .cse11 .cse20))) [2022-02-23 22:49:07,509 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse13 (div main_~c~0 2)) (.cse1 (= main_~c~0 main_~a~0)) (.cse2 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse12 (<= (div (* (- 1) main_~v~0) (- 2)) main_~b~0)) (.cse7 (< main_~b~0 main_~c~0)) (.cse9 (<= main_~a~0 2)) (.cse0 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse3 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 2)) (.cse5 (= main_~k~0 0)) (.cse14 (= main_~s~0 1)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse15 (= main_~b~0 main_~y~0)) (.cse8 (= main_~d~0 1)) (.cse16 (= main_~q~0 0)) (.cse17 (<= main_~x~0 main_~a~0)) (.cse10 (<= 1 main_~y~0)) (.cse18 (= main_~a~0 main_~x~0)) (.cse19 (= main_~c~0 main_~x~0)) (.cse11 (<= main_~x~0 2)) (.cse20 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse12 .cse7 .cse9 .cse10 (<= main_~b~0 (div .cse13 2)) .cse11) (and .cse0 .cse3 .cse4 .cse5 .cse14 (<= main_~b~0 .cse13) .cse6 .cse12 .cse15 .cse16 .cse17 .cse10 .cse18 .cse19 .cse11 .cse20) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse12 .cse7 .cse9 (<= main_~b~0 (div main_~v~0 2)) .cse10 .cse11) (and .cse0 .cse3 .cse4 .cse5 .cse14 .cse6 .cse15 (<= main_~b~0 main_~c~0) .cse8 .cse16 .cse17 .cse10 .cse18 .cse19 .cse11 .cse20))) [2022-02-23 22:49:07,509 INFO L858 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2022-02-23 22:49:07,510 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-02-23 22:49:07,510 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-02-23 22:49:07,510 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-02-23 22:49:07,510 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-02-23 22:49:07,510 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-02-23 22:49:07,510 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-02-23 22:49:07,512 INFO L732 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:07,513 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 22:49:07,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:49:07 BasicIcfg [2022-02-23 22:49:07,527 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 22:49:07,527 INFO L158 Benchmark]: Toolchain (without parser) took 106016.07ms. Allocated memory was 207.6MB in the beginning and 333.4MB in the end (delta: 125.8MB). Free memory was 151.3MB in the beginning and 111.7MB in the end (delta: 39.7MB). Peak memory consumption was 174.4MB. Max. memory is 8.0GB. [2022-02-23 22:49:07,528 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 207.6MB. Free memory is still 167.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 22:49:07,528 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.53ms. Allocated memory was 207.6MB in the beginning and 277.9MB in the end (delta: 70.3MB). Free memory was 151.1MB in the beginning and 247.3MB in the end (delta: -96.2MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-02-23 22:49:07,528 INFO L158 Benchmark]: Boogie Preprocessor took 35.84ms. Allocated memory is still 277.9MB. Free memory was 247.3MB in the beginning and 245.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 22:49:07,528 INFO L158 Benchmark]: RCFGBuilder took 287.96ms. Allocated memory is still 277.9MB. Free memory was 245.9MB in the beginning and 234.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 22:49:07,528 INFO L158 Benchmark]: IcfgTransformer took 17.93ms. Allocated memory is still 277.9MB. Free memory was 234.3MB in the beginning and 232.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 22:49:07,528 INFO L158 Benchmark]: TraceAbstraction took 105444.33ms. Allocated memory was 277.9MB in the beginning and 333.4MB in the end (delta: 55.6MB). Free memory was 232.2MB in the beginning and 111.7MB in the end (delta: 120.5MB). Peak memory consumption was 185.7MB. Max. memory is 8.0GB. [2022-02-23 22:49:07,529 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 207.6MB. Free memory is still 167.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 224.53ms. Allocated memory was 207.6MB in the beginning and 277.9MB in the end (delta: 70.3MB). Free memory was 151.1MB in the beginning and 247.3MB in the end (delta: -96.2MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.84ms. Allocated memory is still 277.9MB. Free memory was 247.3MB in the beginning and 245.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 287.96ms. Allocated memory is still 277.9MB. Free memory was 245.9MB in the beginning and 234.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.93ms. Allocated memory is still 277.9MB. Free memory was 234.3MB in the beginning and 232.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 105444.33ms. Allocated memory was 277.9MB in the beginning and 333.4MB in the end (delta: 55.6MB). Free memory was 232.2MB in the beginning and 111.7MB in the end (delta: 120.5MB). Peak memory consumption was 185.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 105.4s, OverallIterations: 21, TraceHistogramMax: 22, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 40.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 43.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 1406 SdHoareTripleChecker+Valid, 26.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1347 mSDsluCounter, 7228 SdHoareTripleChecker+Invalid, 25.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 48 IncrementalHoareTripleChecker+Unchecked, 6182 mSDsCounter, 1898 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6272 IncrementalHoareTripleChecker+Invalid, 8220 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1898 mSolverCounterUnsat, 1046 mSDtfsCounter, 6272 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2963 GetRequests, 2461 SyntacticMatches, 18 SemanticMatches, 484 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 17.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=351occurred in iteration=14, InterpolantAutomatonStates: 312, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 21 MinimizatonAttempts, 406 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 399 PreInvPairs, 485 NumberOfFragments, 2008 HoareAnnotationTreeSize, 399 FomulaSimplifications, 14974 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 38964 FormulaSimplificationTreeSizeReductionInter, 42.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 14.4s InterpolantComputationTime, 1571 NumberOfCodeBlocks, 1451 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 2616 ConstructedInterpolants, 2 QuantifiedInterpolants, 12487 SizeOfPredicates, 133 NumberOfNonLiveVariables, 3839 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 34 InterpolantComputations, 7 PerfectInterpolantSequences, 6397/6930 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((((((((v == d * b && c == a) && b == q * x + y * s) && 1 <= x) && y <= 2) && k == 0) && a == y * r + p * x) && -1 * v / -2 <= b) && b < c) && a <= 2) && 1 <= y) && b <= c / 2 / 2) && x <= 2) || (((((((((((((((v == d * b && 1 <= x) && y <= 2) && k == 0) && s == 1) && b <= c / 2) && a == y * r + p * x) && -1 * v / -2 <= b) && b == y) && q == 0) && x <= a) && 1 <= y) && a == x) && c == x) && x <= 2) && p == 1)) || ((((((((((((v == d * b && c == a) && b == q * x + y * s) && 1 <= x) && y <= 2) && k == 0) && a == y * r + p * x) && -1 * v / -2 <= b) && b < c) && a <= 2) && b <= v / 2) && 1 <= y) && x <= 2)) || (((((((((((((((v == d * b && 1 <= x) && y <= 2) && k == 0) && s == 1) && a == y * r + p * x) && b == y) && b <= c) && d == 1) && q == 0) && x <= a) && 1 <= y) && a == x) && c == x) && x <= 2) && p == 1)) || ((((((((((((((v == d * b && c == a) && b == q * x + y * s) && 1 <= x) && y <= 2) && k == 0) && a == y * r + p * x) && r == 1) && a == y) && b < c) && d == 1) && 0 <= b) && q == 1) && 1 <= y) && x <= 2) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((((b < a && b < (2 + -1 * b) / 2) && 1 <= x) && y <= 2) && c < (-1 * c + 2) / 2) && q * x + a + y * s == y * r + p * x) && a == y * r + p * x) && 0 <= c) && 0 <= b) && 1 <= y) && x <= 2) || (((((((((((s == 0 && p == 0) && k == 0) && r == 1) && a == y) && b == x) && c <= 2) && b <= c) && x < a) && a <= 2) && 1 <= b) && q == 1)) || ((((((((1 <= x && y <= 2) && q * x + a + y * s == y * r + p * x) && 1 <= a) && a <= (2 + -1 * b) / 2) && c <= (b + -4) / 2 + 2) && c == 0) && 1 <= y) && x <= 2)) || (((((((((y <= 2 && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && x <= 2) && p == 1) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((((b < a && v == d * b) && y * r + b + p * x == q * x * 3 + 3 * (y * s)) && y * r + b + p * x == q * x + k * y * s + q * k * x + y * s) && b == q * x + y * s) && 1 <= x) && y <= 2) && -1 * v / -2 <= b) && (-1 + -1 * c) / -2 < b + 1) && a <= 2) && c == 0) && 1 <= y) && x <= 2) || (((((((((((v == d * b && x == c + b) && s == 1) && a == y * r + p * x) && 0 <= c) && b == y) && k == 1) && !(b <= c)) && q == 0) && a == x) && x <= 2) && p == 1)) || (((((((((((s == 0 && p == 0) && k == 0) && r == 1) && a == y) && b < c) && b == x) && c <= 2) && x < a) && a <= 2) && 1 <= b) && q == 1)) || (((((((((((y <= 2 && k == 0) && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && c == x) && x <= 2) && p == 1) RESULT: Ultimate proved your program to be correct! [2022-02-23 22:49:07,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...