/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/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 00:02:42,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 00:02:42,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 00:02:42,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 00:02:42,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 00:02:42,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 00:02:42,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 00:02:42,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 00:02:42,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 00:02:42,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 00:02:42,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 00:02:42,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 00:02:42,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 00:02:42,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 00:02:42,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 00:02:42,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 00:02:42,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 00:02:42,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 00:02:42,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 00:02:42,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 00:02:42,745 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 00:02:42,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 00:02:42,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 00:02:42,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 00:02:42,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 00:02:42,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 00:02:42,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 00:02:42,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 00:02:42,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 00:02:42,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-19 00:02:42,779 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 00:02:42,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 00:02:42,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 00:02:42,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 00:02:42,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 00:02:42,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 00:02:42,781 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 00:02:42,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 00:02:42,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 00:02:42,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 00:02:42,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 00:02:42,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 00:02:42,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 00:02:42,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 00:02:42,782 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 00:02:42,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 00:02:42,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 00:02:42,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 00:02:42,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 00:02:42,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 00:02:42,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 00:02:42,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 00:02:42,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 00:02:42,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 00:02:42,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 00:02:42,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 00:02:42,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-19 00:02:42,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-19 00:02:42,784 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-19 00:02:42,784 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 00:02:42,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 00:02:42,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 00:02:42,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 00:02:42,978 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 00:02:42,980 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 00:02:42,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-03-19 00:02:43,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f08e97fc3/70884a84ac224803b1203d26b87dca56/FLAG1a2f2b93a [2022-03-19 00:02:43,356 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 00:02:43,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-03-19 00:02:43,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f08e97fc3/70884a84ac224803b1203d26b87dca56/FLAG1a2f2b93a [2022-03-19 00:02:43,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f08e97fc3/70884a84ac224803b1203d26b87dca56 [2022-03-19 00:02:43,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 00:02:43,370 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-19 00:02:43,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 00:02:43,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 00:02:43,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 00:02:43,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:02:43" (1/1) ... [2022-03-19 00:02:43,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18d20491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:43, skipping insertion in model container [2022-03-19 00:02:43,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:02:43" (1/1) ... [2022-03-19 00:02:43,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 00:02:43,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 00:02:43,492 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/fermat2-ll_unwindbound100.c[524,537] [2022-03-19 00:02:43,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 00:02:43,508 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 00:02:43,515 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/fermat2-ll_unwindbound100.c[524,537] [2022-03-19 00:02:43,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 00:02:43,532 INFO L208 MainTranslator]: Completed translation [2022-03-19 00:02:43,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:43 WrapperNode [2022-03-19 00:02:43,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 00:02:43,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 00:02:43,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 00:02:43,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 00:02:43,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:43" (1/1) ... [2022-03-19 00:02:43,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:43" (1/1) ... [2022-03-19 00:02:43,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:43" (1/1) ... [2022-03-19 00:02:43,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:43" (1/1) ... [2022-03-19 00:02:43,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:43" (1/1) ... [2022-03-19 00:02:43,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:43" (1/1) ... [2022-03-19 00:02:43,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:43" (1/1) ... [2022-03-19 00:02:43,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 00:02:43,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 00:02:43,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 00:02:43,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 00:02:43,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:43" (1/1) ... [2022-03-19 00:02:43,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 00:02:43,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:02:43,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 00:02:43,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 00:02:43,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 00:02:43,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 00:02:43,601 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 00:02:43,601 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 00:02:43,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 00:02:43,601 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 00:02:43,601 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 00:02:43,601 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 00:02:43,601 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 00:02:43,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 00:02:43,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 00:02:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 00:02:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 00:02:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 00:02:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 00:02:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 00:02:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 00:02:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 00:02:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 00:02:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 00:02:43,643 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 00:02:43,644 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 00:02:43,723 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 00:02:43,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 00:02:43,727 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 00:02:43,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:02:43 BoogieIcfgContainer [2022-03-19 00:02:43,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 00:02:43,729 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-19 00:02:43,729 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-19 00:02:43,730 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-19 00:02:43,732 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:02:43" (1/1) ... [2022-03-19 00:02:43,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 12:02:43 BasicIcfg [2022-03-19 00:02:43,745 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-19 00:02:43,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 00:02:43,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 00:02:43,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 00:02:43,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 12:02:43" (1/4) ... [2022-03-19 00:02:43,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d9e91c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:02:43, skipping insertion in model container [2022-03-19 00:02:43,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:02:43" (2/4) ... [2022-03-19 00:02:43,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d9e91c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:02:43, skipping insertion in model container [2022-03-19 00:02:43,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:02:43" (3/4) ... [2022-03-19 00:02:43,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d9e91c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 12:02:43, skipping insertion in model container [2022-03-19 00:02:43,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 12:02:43" (4/4) ... [2022-03-19 00:02:43,750 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.cqvasr [2022-03-19 00:02:43,753 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 00:02:43,753 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 00:02:43,798 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 00:02:43,813 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 00:02:43,813 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 00:02:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 00:02:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 00:02:43,832 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:02:43,832 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:02:43,832 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:02:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:02:43,836 INFO L85 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2022-03-19 00:02:43,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:02:43,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693806054] [2022-03-19 00:02:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:43,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:02:43,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:02:43,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356533607] [2022-03-19 00:02:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:43,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:43,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:02:43,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:02:43,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 00:02:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:02:43,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-19 00:02:43,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:02:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 00:02:44,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:02:44,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:02:44,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693806054] [2022-03-19 00:02:44,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:02:44,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356533607] [2022-03-19 00:02:44,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356533607] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:02:44,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:02:44,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-19 00:02:44,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352519455] [2022-03-19 00:02:44,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:02:44,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-19 00:02:44,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:02:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-19 00:02:44,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-19 00:02:44,095 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 00:02:44,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:02:44,110 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-19 00:02:44,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-19 00:02:44,112 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-19 00:02:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:02:44,119 INFO L225 Difference]: With dead ends: 53 [2022-03-19 00:02:44,119 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 00:02:44,121 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-19 00:02:44,123 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:02:44,124 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:02:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 00:02:44,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-19 00:02:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 00:02:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-19 00:02:44,148 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-03-19 00:02:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:02:44,148 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-19 00:02:44,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 00:02:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-19 00:02:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 00:02:44,149 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:02:44,150 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:02:44,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 00:02:44,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-19 00:02:44,366 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:02:44,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:02:44,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2022-03-19 00:02:44,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:02:44,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512196658] [2022-03-19 00:02:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:44,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:02:44,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:02:44,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833617155] [2022-03-19 00:02:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:44,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:44,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:02:44,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:02:44,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 00:02:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:02:44,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 00:02:44,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:02:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:02:44,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:02:44,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:02:44,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512196658] [2022-03-19 00:02:44,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:02:44,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833617155] [2022-03-19 00:02:44,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833617155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:02:44,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:02:44,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 00:02:44,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240671211] [2022-03-19 00:02:44,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:02:44,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 00:02:44,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:02:44,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 00:02:44,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 00:02:44,528 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 00:02:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:02:44,546 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-19 00:02:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 00:02:44,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 00:02:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:02:44,548 INFO L225 Difference]: With dead ends: 34 [2022-03-19 00:02:44,548 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 00:02:44,548 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 00:02:44,550 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:02:44,550 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:02:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 00:02:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-19 00:02:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 00:02:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-19 00:02:44,555 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-03-19 00:02:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:02:44,556 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-19 00:02:44,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 00:02:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-19 00:02:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 00:02:44,556 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:02:44,556 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:02:44,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 00:02:44,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-03-19 00:02:44,760 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:02:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:02:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2022-03-19 00:02:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:02:44,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408243188] [2022-03-19 00:02:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:02:44,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:02:44,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479546241] [2022-03-19 00:02:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:44,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:44,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:02:44,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:02:44,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 00:02:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:02:44,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 00:02:44,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:02:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:02:45,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:02:45,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:02:45,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408243188] [2022-03-19 00:02:45,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:02:45,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479546241] [2022-03-19 00:02:45,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479546241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:02:45,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:02:45,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 00:02:45,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234822376] [2022-03-19 00:02:45,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:02:45,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:02:45,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:02:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:02:45,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:02:45,132 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 00:02:47,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:02:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:02:47,194 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-03-19 00:02:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:02:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-19 00:02:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:02:47,195 INFO L225 Difference]: With dead ends: 37 [2022-03-19 00:02:47,195 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 00:02:47,196 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:02:47,196 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:02:47,197 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 00:02:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 00:02:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-03-19 00:02:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 00:02:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-19 00:02:47,202 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-03-19 00:02:47,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:02:47,202 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-19 00:02:47,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 00:02:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-19 00:02:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 00:02:47,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:02:47,203 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:02:47,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 00:02:47,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:47,419 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:02:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:02:47,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2022-03-19 00:02:47,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:02:47,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884224068] [2022-03-19 00:02:47,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:47,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:02:47,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:02:47,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054668310] [2022-03-19 00:02:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:47,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:47,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:02:47,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:02:47,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 00:02:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:02:47,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 00:02:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:02:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:02:47,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:02:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:02:47,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:02:47,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884224068] [2022-03-19 00:02:47,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:02:47,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054668310] [2022-03-19 00:02:47,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054668310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:02:47,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:02:47,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 00:02:47,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920045742] [2022-03-19 00:02:47,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:02:47,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 00:02:47,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:02:47,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 00:02:47,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 00:02:47,738 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 00:02:47,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:02:47,801 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-03-19 00:02:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 00:02:47,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-03-19 00:02:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:02:47,803 INFO L225 Difference]: With dead ends: 39 [2022-03-19 00:02:47,803 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 00:02:47,803 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-19 00:02:47,804 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:02:47,804 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 112 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:02:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 00:02:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-03-19 00:02:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 00:02:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-19 00:02:47,809 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-03-19 00:02:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:02:47,809 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-19 00:02:47,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 00:02:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-19 00:02:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 00:02:47,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:02:47,810 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:02:47,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 00:02:48,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:48,026 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:02:48,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:02:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2022-03-19 00:02:48,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:02:48,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005999382] [2022-03-19 00:02:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:48,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:02:48,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:02:48,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388600701] [2022-03-19 00:02:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:48,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:48,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:02:48,035 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:02:48,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 00:02:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:02:48,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 00:02:48,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:02:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:02:48,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:02:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:02:48,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:02:48,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005999382] [2022-03-19 00:02:48,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:02:48,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388600701] [2022-03-19 00:02:48,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388600701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:02:48,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:02:48,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 00:02:48,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332789632] [2022-03-19 00:02:48,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:02:48,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 00:02:48,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:02:48,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 00:02:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 00:02:48,184 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 00:02:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:02:48,239 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-03-19 00:02:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 00:02:48,239 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 32 [2022-03-19 00:02:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:02:48,242 INFO L225 Difference]: With dead ends: 61 [2022-03-19 00:02:48,242 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 00:02:48,242 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-19 00:02:48,244 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:02:48,246 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 116 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:02:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 00:02:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-19 00:02:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 00:02:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-19 00:02:48,268 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 32 [2022-03-19 00:02:48,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:02:48,268 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-19 00:02:48,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 00:02:48,268 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-19 00:02:48,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 00:02:48,269 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:02:48,269 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:02:48,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 00:02:48,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:48,470 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:02:48,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:02:48,470 INFO L85 PathProgramCache]: Analyzing trace with hash -906969448, now seen corresponding path program 2 times [2022-03-19 00:02:48,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:02:48,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111280837] [2022-03-19 00:02:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:48,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:02:48,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:02:48,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502321756] [2022-03-19 00:02:48,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 00:02:48,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:48,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:02:48,482 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:02:48,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 00:02:48,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 00:02:48,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:02:48,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 00:02:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:02:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:02:48,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:02:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 00:02:48,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:02:48,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111280837] [2022-03-19 00:02:48,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:02:48,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502321756] [2022-03-19 00:02:48,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502321756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:02:48,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:02:48,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 00:02:48,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372048678] [2022-03-19 00:02:48,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:02:48,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 00:02:48,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:02:48,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 00:02:48,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 00:02:48,787 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-19 00:02:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:02:48,917 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2022-03-19 00:02:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 00:02:48,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2022-03-19 00:02:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:02:48,918 INFO L225 Difference]: With dead ends: 115 [2022-03-19 00:02:48,918 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 00:02:48,919 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-19 00:02:48,919 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:02:48,919 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 148 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:02:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 00:02:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-19 00:02:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 00:02:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-03-19 00:02:48,930 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 59 [2022-03-19 00:02:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:02:48,930 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-03-19 00:02:48,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-19 00:02:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-03-19 00:02:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 00:02:48,932 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:02:48,932 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:02:48,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 00:02:49,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:49,147 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:02:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:02:49,148 INFO L85 PathProgramCache]: Analyzing trace with hash 191644600, now seen corresponding path program 3 times [2022-03-19 00:02:49,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:02:49,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370924400] [2022-03-19 00:02:49,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:49,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:02:49,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:02:49,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861741374] [2022-03-19 00:02:49,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 00:02:49,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:49,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:02:49,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:02:49,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 00:02:51,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-19 00:02:51,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:02:51,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 00:02:51,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:02:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:02:51,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:02:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 00:02:51,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:02:51,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370924400] [2022-03-19 00:02:51,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:02:51,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861741374] [2022-03-19 00:02:51,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861741374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:02:51,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:02:51,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-19 00:02:51,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283234045] [2022-03-19 00:02:51,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:02:51,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 00:02:51,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:02:51,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 00:02:51,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-19 00:02:51,770 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-19 00:02:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:02:52,121 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2022-03-19 00:02:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 00:02:52,122 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 113 [2022-03-19 00:02:52,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:02:52,123 INFO L225 Difference]: With dead ends: 223 [2022-03-19 00:02:52,123 INFO L226 Difference]: Without dead ends: 218 [2022-03-19 00:02:52,124 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 00:02:52,124 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 218 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:02:52,125 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 256 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:02:52,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-19 00:02:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-03-19 00:02:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 00:02:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-03-19 00:02:52,141 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 113 [2022-03-19 00:02:52,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:02:52,141 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-03-19 00:02:52,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-19 00:02:52,142 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-03-19 00:02:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-19 00:02:52,144 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:02:52,144 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:02:52,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 00:02:52,349 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:52,350 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:02:52,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:02:52,350 INFO L85 PathProgramCache]: Analyzing trace with hash -698087944, now seen corresponding path program 4 times [2022-03-19 00:02:52,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:02:52,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069288826] [2022-03-19 00:02:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:52,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:02:52,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:02:52,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885528747] [2022-03-19 00:02:52,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 00:02:52,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:52,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:02:52,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:02:52,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 00:02:52,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 00:02:52,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:02:52,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 00:02:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:02:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:02:53,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:02:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-19 00:02:53,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:02:53,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069288826] [2022-03-19 00:02:53,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:02:53,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885528747] [2022-03-19 00:02:53,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885528747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:02:53,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:02:53,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-19 00:02:53,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781751646] [2022-03-19 00:02:53,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:02:53,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 00:02:53,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:02:53,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 00:02:53,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 00:02:53,960 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-03-19 00:02:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:02:55,098 INFO L93 Difference]: Finished difference Result 439 states and 509 transitions. [2022-03-19 00:02:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-19 00:02:55,099 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 221 [2022-03-19 00:02:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:02:55,101 INFO L225 Difference]: With dead ends: 439 [2022-03-19 00:02:55,101 INFO L226 Difference]: Without dead ends: 434 [2022-03-19 00:02:55,103 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-03-19 00:02:55,103 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 725 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 00:02:55,104 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 518 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 00:02:55,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-19 00:02:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-03-19 00:02:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-19 00:02:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-03-19 00:02:55,126 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 221 [2022-03-19 00:02:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:02:55,126 INFO L478 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-03-19 00:02:55,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-03-19 00:02:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-03-19 00:02:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-03-19 00:02:55,131 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:02:55,131 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:02:55,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 00:02:55,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-19 00:02:55,348 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:02:55,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:02:55,349 INFO L85 PathProgramCache]: Analyzing trace with hash -619812232, now seen corresponding path program 5 times [2022-03-19 00:02:55,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:02:55,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447662108] [2022-03-19 00:02:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:02:55,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:02:55,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:02:55,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254124181] [2022-03-19 00:02:55,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 00:02:55,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:02:55,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:02:55,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:02:55,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 00:02:57,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-03-19 00:02:57,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:02:57,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-19 00:02:57,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:02:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:02:58,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:03:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-03-19 00:03:01,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:03:01,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447662108] [2022-03-19 00:03:01,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:03:01,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254124181] [2022-03-19 00:03:01,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254124181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:03:01,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:03:01,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-03-19 00:03:01,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554608418] [2022-03-19 00:03:01,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:03:01,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-19 00:03:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:03:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-19 00:03:01,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 00:03:01,369 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-03-19 00:03:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:03:05,364 INFO L93 Difference]: Finished difference Result 871 states and 1013 transitions. [2022-03-19 00:03:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-03-19 00:03:05,365 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) Word has length 437 [2022-03-19 00:03:05,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:03:05,368 INFO L225 Difference]: With dead ends: 871 [2022-03-19 00:03:05,368 INFO L226 Difference]: Without dead ends: 866 [2022-03-19 00:03:05,375 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-03-19 00:03:05,375 INFO L912 BasicCegarLoop]: 119 mSDtfsCounter, 1515 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 00:03:05,375 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 974 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 00:03:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-03-19 00:03:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2022-03-19 00:03:05,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 670 states have (on average 1.1417910447761195) internal successors, (765), 670 states have internal predecessors, (765), 99 states have call successors, (99), 98 states have call predecessors, (99), 96 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-19 00:03:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 961 transitions. [2022-03-19 00:03:05,409 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 961 transitions. Word has length 437 [2022-03-19 00:03:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:03:05,409 INFO L478 AbstractCegarLoop]: Abstraction has 866 states and 961 transitions. [2022-03-19 00:03:05,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-03-19 00:03:05,410 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 961 transitions. [2022-03-19 00:03:05,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-03-19 00:03:05,423 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:03:05,423 INFO L500 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:03:05,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 00:03:05,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:03:05,632 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:03:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:03:05,632 INFO L85 PathProgramCache]: Analyzing trace with hash 151958392, now seen corresponding path program 6 times [2022-03-19 00:03:05,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:03:05,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651840564] [2022-03-19 00:03:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:03:05,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:03:05,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:03:05,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265474266] [2022-03-19 00:03:05,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 00:03:05,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:03:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:03:05,666 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:03:05,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process