/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/cohendiv-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 20:43:43,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 20:43:43,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 20:43:43,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 20:43:43,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 20:43:43,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 20:43:43,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 20:43:43,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 20:43:43,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 20:43:43,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 20:43:43,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 20:43:43,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 20:43:43,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 20:43:43,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 20:43:43,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 20:43:43,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 20:43:43,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 20:43:43,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 20:43:43,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 20:43:43,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 20:43:43,370 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 20:43:43,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 20:43:43,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 20:43:43,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 20:43:43,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 20:43:43,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 20:43:43,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 20:43:43,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 20:43:43,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 20:43:43,386 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 20:43:43,407 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 20:43:43,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 20:43:43,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 20:43:43,408 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 20:43:43,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 20:43:43,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 20:43:43,409 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 20:43:43,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 20:43:43,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 20:43:43,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 20:43:43,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 20:43:43,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 20:43:43,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 20:43:43,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 20:43:43,410 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 20:43:43,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 20:43:43,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 20:43:43,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 20:43:43,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 20:43:43,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:43:43,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 20:43:43,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 20:43:43,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 20:43:43,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 20:43:43,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 20:43:43,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 20:43:43,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 20:43:43,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 20:43:43,412 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 20:43:43,412 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 20:43:43,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 20:43:43,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 20:43:43,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 20:43:43,630 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 20:43:43,630 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 20:43:43,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2022-03-17 20:43:43,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bd62307a/47d40a52f84e4e3a9397d58dc97ac277/FLAG8526f6109 [2022-03-17 20:43:44,045 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 20:43:44,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound5.c [2022-03-17 20:43:44,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bd62307a/47d40a52f84e4e3a9397d58dc97ac277/FLAG8526f6109 [2022-03-17 20:43:44,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bd62307a/47d40a52f84e4e3a9397d58dc97ac277 [2022-03-17 20:43:44,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 20:43:44,489 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 20:43:44,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 20:43:44,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 20:43:44,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 20:43:44,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:43:44" (1/1) ... [2022-03-17 20:43:44,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39bf2dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:44, skipping insertion in model container [2022-03-17 20:43:44,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:43:44" (1/1) ... [2022-03-17 20:43:44,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 20:43:44,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 20:43:44,650 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/cohendiv-ll_unwindbound5.c[576,589] [2022-03-17 20:43:44,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:43:44,665 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 20:43:44,673 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/cohendiv-ll_unwindbound5.c[576,589] [2022-03-17 20:43:44,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:43:44,691 INFO L208 MainTranslator]: Completed translation [2022-03-17 20:43:44,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:44 WrapperNode [2022-03-17 20:43:44,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 20:43:44,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 20:43:44,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 20:43:44,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 20:43:44,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:44" (1/1) ... [2022-03-17 20:43:44,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:44" (1/1) ... [2022-03-17 20:43:44,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:44" (1/1) ... [2022-03-17 20:43:44,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:44" (1/1) ... [2022-03-17 20:43:44,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:44" (1/1) ... [2022-03-17 20:43:44,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:44" (1/1) ... [2022-03-17 20:43:44,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:44" (1/1) ... [2022-03-17 20:43:44,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 20:43:44,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 20:43:44,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 20:43:44,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 20:43:44,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:44" (1/1) ... [2022-03-17 20:43:44,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:43:44,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:44,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 20:43:44,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 20:43:44,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 20:43:44,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 20:43:44,763 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 20:43:44,763 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 20:43:44,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 20:43:44,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 20:43:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 20:43:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 20:43:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 20:43:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 20:43:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 20:43:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 20:43:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 20:43:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 20:43:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 20:43:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 20:43:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 20:43:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 20:43:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 20:43:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 20:43:44,806 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 20:43:44,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 20:43:44,923 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 20:43:44,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 20:43:44,927 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 20:43:44,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:43:44 BoogieIcfgContainer [2022-03-17 20:43:44,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 20:43:44,929 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 20:43:44,929 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 20:43:44,930 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 20:43:44,932 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:43:44" (1/1) ... [2022-03-17 20:43:44,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:43:44 BasicIcfg [2022-03-17 20:43:44,948 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 20:43:44,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 20:43:44,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 20:43:44,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 20:43:44,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 08:43:44" (1/4) ... [2022-03-17 20:43:44,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a18d170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:43:44, skipping insertion in model container [2022-03-17 20:43:44,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:43:44" (2/4) ... [2022-03-17 20:43:44,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a18d170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:43:44, skipping insertion in model container [2022-03-17 20:43:44,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:43:44" (3/4) ... [2022-03-17 20:43:44,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a18d170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:43:44, skipping insertion in model container [2022-03-17 20:43:44,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:43:44" (4/4) ... [2022-03-17 20:43:44,960 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound5.cqvasr [2022-03-17 20:43:44,964 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 20:43:44,964 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 20:43:45,010 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 20:43:45,014 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 [2022-03-17 20:43:45,015 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 20:43:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 20:43:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 20:43:45,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:45,046 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:45,047 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:45,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2022-03-17 20:43:45,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:45,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130391893] [2022-03-17 20:43:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:45,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:45,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:43:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:45,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:43:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:43:45,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:45,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130391893] [2022-03-17 20:43:45,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130391893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:45,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:45,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 20:43:45,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579969316] [2022-03-17 20:43:45,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:45,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 20:43:45,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 20:43:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:43:45,252 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:43:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:45,326 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2022-03-17 20:43:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 20:43:45,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-17 20:43:45,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:45,333 INFO L225 Difference]: With dead ends: 68 [2022-03-17 20:43:45,333 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 20:43:45,336 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:43:45,338 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:45,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:43:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 20:43:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-03-17 20:43:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 20:43:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-03-17 20:43:45,372 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2022-03-17 20:43:45,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:45,372 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-03-17 20:43:45,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:43:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-03-17 20:43:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 20:43:45,373 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:45,373 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:45,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 20:43:45,374 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:45,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:45,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2022-03-17 20:43:45,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:45,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586252495] [2022-03-17 20:43:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:45,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:45,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:45,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442412946] [2022-03-17 20:43:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:45,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:45,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:45,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:45,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 20:43:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:45,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 20:43:45,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:43:45,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:45,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:45,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586252495] [2022-03-17 20:43:45,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:45,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442412946] [2022-03-17 20:43:45,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442412946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:45,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:45,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 20:43:45,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111251471] [2022-03-17 20:43:45,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:45,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 20:43:45,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:45,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 20:43:45,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:43:45,520 INFO L87 Difference]: Start difference. First operand 33 states and 42 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:43:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:45,531 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-03-17 20:43:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 20:43:45,532 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-17 20:43:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:45,533 INFO L225 Difference]: With dead ends: 42 [2022-03-17 20:43:45,533 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 20:43:45,533 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 20:43:45,534 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:45,535 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 20:43:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 20:43:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 20:43:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-17 20:43:45,541 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2022-03-17 20:43:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:45,541 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-17 20:43:45,541 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 20:43:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-17 20:43:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 20:43:45,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:45,542 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:45,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:45,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:45,762 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2022-03-17 20:43:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:45,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670443199] [2022-03-17 20:43:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:45,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:45,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925340024] [2022-03-17 20:43:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:45,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:45,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:45,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:45,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 20:43:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:45,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:43:45,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:43:45,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:45,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:45,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670443199] [2022-03-17 20:43:45,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:45,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925340024] [2022-03-17 20:43:45,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925340024] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:45,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:45,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:43:45,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684472700] [2022-03-17 20:43:45,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:45,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:43:45,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:45,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:43:45,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:43:45,921 INFO L87 Difference]: Start difference. First operand 35 states and 44 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:43:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:45,952 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-17 20:43:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:43:45,953 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-17 20:43:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:45,954 INFO L225 Difference]: With dead ends: 45 [2022-03-17 20:43:45,954 INFO L226 Difference]: Without dead ends: 43 [2022-03-17 20:43:45,954 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:43:45,955 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:45,955 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:45,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-17 20:43:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-03-17 20:43:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 20:43:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-03-17 20:43:45,962 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2022-03-17 20:43:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:45,963 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-03-17 20:43:45,963 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:43:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-03-17 20:43:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 20:43:45,963 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:45,963 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:45,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:46,179 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,SelfDestructingSolverStorable2 [2022-03-17 20:43:46,180 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:46,180 INFO L85 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2022-03-17 20:43:46,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:46,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777769606] [2022-03-17 20:43:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:46,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:46,195 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:46,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917069418] [2022-03-17 20:43:46,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:46,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:46,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:46,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:46,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 20:43:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:46,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:43:46,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:43:46,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:46,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777769606] [2022-03-17 20:43:46,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917069418] [2022-03-17 20:43:46,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917069418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:46,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:46,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:43:46,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373404405] [2022-03-17 20:43:46,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:46,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:43:46,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:46,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:43:46,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:43:46,349 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:43:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:46,400 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-17 20:43:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:43:46,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 20:43:46,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:46,402 INFO L225 Difference]: With dead ends: 58 [2022-03-17 20:43:46,402 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 20:43:46,403 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 [2022-03-17 20:43:46,405 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:46,406 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 149 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:46,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 20:43:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-17 20:43:46,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-17 20:43:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-03-17 20:43:46,414 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2022-03-17 20:43:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:46,414 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-03-17 20:43:46,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:43:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-03-17 20:43:46,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 20:43:46,415 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:46,415 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:46,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:46,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:46,616 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:46,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2022-03-17 20:43:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:46,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094062947] [2022-03-17 20:43:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:46,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:46,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:46,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656223249] [2022-03-17 20:43:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:46,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:46,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:46,644 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:46,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 20:43:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:46,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:43:46,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:43:46,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:46,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:46,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094062947] [2022-03-17 20:43:46,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:46,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656223249] [2022-03-17 20:43:46,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656223249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:46,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:46,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:43:46,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2979647] [2022-03-17 20:43:46,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:46,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:43:46,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:46,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:43:46,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:43:46,742 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 20:43:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:46,780 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2022-03-17 20:43:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:43:46,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2022-03-17 20:43:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:46,782 INFO L225 Difference]: With dead ends: 83 [2022-03-17 20:43:46,782 INFO L226 Difference]: Without dead ends: 81 [2022-03-17 20:43:46,783 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:43:46,783 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:46,783 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 160 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-17 20:43:46,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-03-17 20:43:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 20:43:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-03-17 20:43:46,792 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2022-03-17 20:43:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:46,792 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-03-17 20:43:46,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 20:43:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-03-17 20:43:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 20:43:46,793 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:46,793 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:46,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-17 20:43:47,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:47,008 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:47,009 INFO L85 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2022-03-17 20:43:47,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:47,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49118706] [2022-03-17 20:43:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:47,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:47,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:47,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886940281] [2022-03-17 20:43:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:47,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:47,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:47,025 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:47,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 20:43:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:43:47,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:43:47,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:47,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49118706] [2022-03-17 20:43:47,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886940281] [2022-03-17 20:43:47,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886940281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:47,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:47,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:43:47,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396135355] [2022-03-17 20:43:47,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:47,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:43:47,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:47,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:43:47,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:43:47,127 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 20:43:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:47,151 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2022-03-17 20:43:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:43:47,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-03-17 20:43:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:47,155 INFO L225 Difference]: With dead ends: 113 [2022-03-17 20:43:47,155 INFO L226 Difference]: Without dead ends: 78 [2022-03-17 20:43:47,155 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:43:47,156 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:47,156 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:47,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-17 20:43:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-03-17 20:43:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 20:43:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2022-03-17 20:43:47,164 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2022-03-17 20:43:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:47,164 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2022-03-17 20:43:47,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 20:43:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2022-03-17 20:43:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 20:43:47,165 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:47,165 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:47,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-17 20:43:47,369 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:47,370 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:47,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2022-03-17 20:43:47,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:47,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848455448] [2022-03-17 20:43:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:47,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:47,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:47,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085739019] [2022-03-17 20:43:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:47,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:47,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:47,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:47,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 20:43:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:47,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:43:47,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 20:43:47,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:43:47,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:47,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848455448] [2022-03-17 20:43:47,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:47,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085739019] [2022-03-17 20:43:47,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085739019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:43:47,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:43:47,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-17 20:43:47,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680478823] [2022-03-17 20:43:47,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:43:47,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:43:47,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:47,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:43:47,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:43:47,507 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 20:43:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:47,580 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-03-17 20:43:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 20:43:47,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-03-17 20:43:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:47,583 INFO L225 Difference]: With dead ends: 84 [2022-03-17 20:43:47,583 INFO L226 Difference]: Without dead ends: 82 [2022-03-17 20:43:47,583 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:43:47,584 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:47,584 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 203 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-17 20:43:47,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-17 20:43:47,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 20:43:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-03-17 20:43:47,607 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2022-03-17 20:43:47,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:47,607 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-03-17 20:43:47,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 20:43:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-03-17 20:43:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 20:43:47,608 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:47,608 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:47,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:47,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:47,827 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:47,827 INFO L85 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2022-03-17 20:43:47,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:47,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84839475] [2022-03-17 20:43:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:47,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:47,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882022188] [2022-03-17 20:43:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:47,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:47,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:47,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:47,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 20:43:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:47,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:43:47,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 20:43:48,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 20:43:48,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:48,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84839475] [2022-03-17 20:43:48,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:48,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882022188] [2022-03-17 20:43:48,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882022188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:43:48,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:43:48,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-17 20:43:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470554665] [2022-03-17 20:43:48,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:48,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 20:43:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 20:43:48,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:43:48,195 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-17 20:43:48,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:48,269 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-03-17 20:43:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 20:43:48,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 47 [2022-03-17 20:43:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:48,270 INFO L225 Difference]: With dead ends: 88 [2022-03-17 20:43:48,271 INFO L226 Difference]: Without dead ends: 86 [2022-03-17 20:43:48,271 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-17 20:43:48,271 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:48,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 137 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:43:48,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-17 20:43:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-17 20:43:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 20:43:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-03-17 20:43:48,278 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2022-03-17 20:43:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:48,278 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-03-17 20:43:48,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-17 20:43:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-03-17 20:43:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-17 20:43:48,279 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:48,279 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:48,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:48,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:48,496 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:48,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2022-03-17 20:43:48,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:48,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929296490] [2022-03-17 20:43:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:48,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:48,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:48,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730031330] [2022-03-17 20:43:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:48,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:48,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:48,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:48,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 20:43:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:48,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:43:48,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 20:43:48,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 20:43:48,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:48,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929296490] [2022-03-17 20:43:48,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:48,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730031330] [2022-03-17 20:43:48,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730031330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:43:48,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:43:48,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-17 20:43:48,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125587810] [2022-03-17 20:43:48,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:48,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 20:43:48,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:48,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 20:43:48,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-17 20:43:48,773 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-17 20:43:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:48,857 INFO L93 Difference]: Finished difference Result 202 states and 238 transitions. [2022-03-17 20:43:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 20:43:48,858 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 50 [2022-03-17 20:43:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:48,861 INFO L225 Difference]: With dead ends: 202 [2022-03-17 20:43:48,861 INFO L226 Difference]: Without dead ends: 195 [2022-03-17 20:43:48,862 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-17 20:43:48,863 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 70 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:48,864 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 195 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:43:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-17 20:43:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 186. [2022-03-17 20:43:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 120 states have (on average 1.175) internal successors, (141), 126 states have internal predecessors, (141), 42 states have call successors, (42), 24 states have call predecessors, (42), 23 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-17 20:43:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 221 transitions. [2022-03-17 20:43:48,883 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 221 transitions. Word has length 50 [2022-03-17 20:43:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:48,884 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 221 transitions. [2022-03-17 20:43:48,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-17 20:43:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 221 transitions. [2022-03-17 20:43:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 20:43:48,888 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:48,888 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:48,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-17 20:43:49,122 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,SelfDestructingSolverStorable8 [2022-03-17 20:43:49,122 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2022-03-17 20:43:49,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:49,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709192481] [2022-03-17 20:43:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:49,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:49,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:49,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736599541] [2022-03-17 20:43:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:49,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:49,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:49,155 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:49,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 20:43:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:49,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-17 20:43:49,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 20:43:49,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:49,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:49,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709192481] [2022-03-17 20:43:49,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:49,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736599541] [2022-03-17 20:43:49,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736599541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:43:49,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:43:49,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-17 20:43:49,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646917146] [2022-03-17 20:43:49,613 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:49,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 20:43:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:49,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 20:43:49,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-17 20:43:49,614 INFO L87 Difference]: Start difference. First operand 186 states and 221 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-17 20:43:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:49,767 INFO L93 Difference]: Finished difference Result 242 states and 288 transitions. [2022-03-17 20:43:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 20:43:49,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2022-03-17 20:43:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:49,768 INFO L225 Difference]: With dead ends: 242 [2022-03-17 20:43:49,769 INFO L226 Difference]: Without dead ends: 158 [2022-03-17 20:43:49,769 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-03-17 20:43:49,770 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:49,770 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 227 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:43:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-17 20:43:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-03-17 20:43:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 105 states have internal predecessors, (117), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-17 20:43:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 184 transitions. [2022-03-17 20:43:49,779 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 184 transitions. Word has length 55 [2022-03-17 20:43:49,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:49,780 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 184 transitions. [2022-03-17 20:43:49,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-17 20:43:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 184 transitions. [2022-03-17 20:43:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-17 20:43:49,780 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:49,780 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:49,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-17 20:43:49,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 20:43:49,989 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash 136506131, now seen corresponding path program 1 times [2022-03-17 20:43:49,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:49,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746051557] [2022-03-17 20:43:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:49,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:49,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:49,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406525381] [2022-03-17 20:43:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:49,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:49,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:49,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:50,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 20:43:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:43:50,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-17 20:43:50,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 20:43:50,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:50,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746051557] [2022-03-17 20:43:50,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:50,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406525381] [2022-03-17 20:43:50,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406525381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:43:50,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:43:50,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-17 20:43:50,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874815458] [2022-03-17 20:43:50,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:50,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 20:43:50,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:50,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 20:43:50,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-17 20:43:50,271 INFO L87 Difference]: Start difference. First operand 157 states and 184 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 7 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-17 20:43:50,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:50,356 INFO L93 Difference]: Finished difference Result 225 states and 268 transitions. [2022-03-17 20:43:50,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 20:43:50,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 7 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 63 [2022-03-17 20:43:50,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:50,357 INFO L225 Difference]: With dead ends: 225 [2022-03-17 20:43:50,357 INFO L226 Difference]: Without dead ends: 164 [2022-03-17 20:43:50,359 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-03-17 20:43:50,359 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 52 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:50,360 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 253 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:43:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-17 20:43:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2022-03-17 20:43:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 106 states have (on average 1.1320754716981132) internal successors, (120), 109 states have internal predecessors, (120), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-17 20:43:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 187 transitions. [2022-03-17 20:43:50,372 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 187 transitions. Word has length 63 [2022-03-17 20:43:50,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:50,372 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 187 transitions. [2022-03-17 20:43:50,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 7 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-17 20:43:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 187 transitions. [2022-03-17 20:43:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-17 20:43:50,373 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:50,373 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:50,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:50,616 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 20:43:50,616 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2022-03-17 20:43:50,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:50,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878826272] [2022-03-17 20:43:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:50,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:50,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:50,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490515803] [2022-03-17 20:43:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:50,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:50,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:50,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:50,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 20:43:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:43:50,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-17 20:43:50,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-17 20:43:50,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-17 20:43:51,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:51,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878826272] [2022-03-17 20:43:51,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:51,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490515803] [2022-03-17 20:43:51,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490515803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:43:51,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:43:51,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-17 20:43:51,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894812823] [2022-03-17 20:43:51,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:51,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 20:43:51,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:51,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 20:43:51,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:43:51,063 INFO L87 Difference]: Start difference. First operand 162 states and 187 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-17 20:43:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:51,456 INFO L93 Difference]: Finished difference Result 189 states and 221 transitions. [2022-03-17 20:43:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 20:43:51,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 79 [2022-03-17 20:43:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:51,457 INFO L225 Difference]: With dead ends: 189 [2022-03-17 20:43:51,457 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 20:43:51,458 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-03-17 20:43:51,458 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 77 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:51,458 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 292 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 20:43:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 20:43:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 20:43:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 20:43:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 20:43:51,459 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2022-03-17 20:43:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:51,459 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 20:43:51,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-17 20:43:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 20:43:51,459 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 20:43:51,461 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 20:43:51,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:51,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 20:43:51,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 20:43:52,210 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 20:43:52,210 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:43:52,210 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:43:52,210 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 20:43:52,210 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-17 20:43:52,210 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:43:52,210 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:43:52,210 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-17 20:43:52,210 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-17 20:43:52,210 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-17 20:43:52,210 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-17 20:43:52,210 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 23 65) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:52,210 INFO L878 garLoopResultBuilder]: At program point L30(line 30) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:52,210 INFO L882 garLoopResultBuilder]: For program point L30-1(line 30) no Hoare annotation was computed. [2022-03-17 20:43:52,210 INFO L878 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-17 20:43:52,211 INFO L878 garLoopResultBuilder]: At program point L37-4(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-17 20:43:52,211 INFO L882 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2022-03-17 20:43:52,211 INFO L882 garLoopResultBuilder]: For program point L63(line 63) no Hoare annotation was computed. [2022-03-17 20:43:52,211 INFO L878 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-17 20:43:52,211 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 23 65) no Hoare annotation was computed. [2022-03-17 20:43:52,211 INFO L878 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-03-17 20:43:52,211 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 23 65) no Hoare annotation was computed. [2022-03-17 20:43:52,211 INFO L882 garLoopResultBuilder]: For program point L39(lines 37 61) no Hoare annotation was computed. [2022-03-17 20:43:52,211 INFO L878 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:52,211 INFO L878 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:52,211 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:52,211 INFO L882 garLoopResultBuilder]: For program point L49(lines 46 58) no Hoare annotation was computed. [2022-03-17 20:43:52,211 INFO L882 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2022-03-17 20:43:52,211 INFO L882 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2022-03-17 20:43:52,211 INFO L882 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2022-03-17 20:43:52,211 INFO L878 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:52,211 INFO L878 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-03-17 20:43:52,211 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-17 20:43:52,211 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-03-17 20:43:52,212 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-03-17 20:43:52,212 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-03-17 20:43:52,212 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-03-17 20:43:52,212 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-03-17 20:43:52,214 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:52,214 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 20:43:52,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:43:52 BasicIcfg [2022-03-17 20:43:52,231 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 20:43:52,232 INFO L158 Benchmark]: Toolchain (without parser) took 7742.77ms. Allocated memory was 200.3MB in the beginning and 270.5MB in the end (delta: 70.3MB). Free memory was 144.7MB in the beginning and 95.1MB in the end (delta: 49.6MB). Peak memory consumption was 120.2MB. Max. memory is 8.0GB. [2022-03-17 20:43:52,232 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory is still 160.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 20:43:52,232 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.48ms. Allocated memory was 200.3MB in the beginning and 270.5MB in the end (delta: 70.3MB). Free memory was 144.6MB in the beginning and 240.6MB in the end (delta: -96.0MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. [2022-03-17 20:43:52,232 INFO L158 Benchmark]: Boogie Preprocessor took 20.76ms. Allocated memory is still 270.5MB. Free memory was 240.6MB in the beginning and 239.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 20:43:52,233 INFO L158 Benchmark]: RCFGBuilder took 214.75ms. Allocated memory is still 270.5MB. Free memory was 239.2MB in the beginning and 228.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 20:43:52,233 INFO L158 Benchmark]: IcfgTransformer took 18.83ms. Allocated memory is still 270.5MB. Free memory was 228.3MB in the beginning and 227.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 20:43:52,233 INFO L158 Benchmark]: TraceAbstraction took 7282.40ms. Allocated memory is still 270.5MB. Free memory was 226.6MB in the beginning and 95.1MB in the end (delta: 131.4MB). Peak memory consumption was 131.8MB. Max. memory is 8.0GB. [2022-03-17 20:43:52,234 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory is still 160.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 200.48ms. Allocated memory was 200.3MB in the beginning and 270.5MB in the end (delta: 70.3MB). Free memory was 144.6MB in the beginning and 240.6MB in the end (delta: -96.0MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.76ms. Allocated memory is still 270.5MB. Free memory was 240.6MB in the beginning and 239.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 214.75ms. Allocated memory is still 270.5MB. Free memory was 239.2MB in the beginning and 228.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 18.83ms. Allocated memory is still 270.5MB. Free memory was 228.3MB in the beginning and 227.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 7282.40ms. Allocated memory is still 270.5MB. Free memory was 226.6MB in the beginning and 95.1MB in the end (delta: 131.4MB). Peak memory consumption was 131.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.2s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 350 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 326 mSDsluCounter, 2056 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1541 mSDsCounter, 215 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 912 IncrementalHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 215 mSolverCounterUnsat, 515 mSDtfsCounter, 912 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 747 GetRequests, 653 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=186occurred in iteration=9, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 24 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 107 PreInvPairs, 165 NumberOfFragments, 250 HoareAnnotationTreeSize, 107 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 16 FomulaSimplificationsInter, 2234 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 476 NumberOfCodeBlocks, 476 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 699 ConstructedInterpolants, 0 QuantifiedInterpolants, 1996 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1473 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 861/960 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((q * y + r == x && 1 <= r) && 1 <= y) && b == a * y) || !(\old(counter) <= 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || ((q * y + r == x && 1 <= y) && b == a * y) RESULT: Ultimate proved your program to be correct! [2022-03-17 20:43:52,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...