/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 19:47:12,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 19:47:12,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 19:47:12,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 19:47:12,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 19:47:12,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 19:47:12,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 19:47:12,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 19:47:12,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 19:47:12,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 19:47:12,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 19:47:12,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 19:47:12,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 19:47:12,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 19:47:12,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 19:47:12,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 19:47:12,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 19:47:12,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 19:47:12,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 19:47:12,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 19:47:12,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 19:47:12,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 19:47:12,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 19:47:12,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 19:47:12,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 19:47:12,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 19:47:12,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 19:47:12,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 19:47:12,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 19:47:12,593 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 19:47:12,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 19:47:12,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 19:47:12,595 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 19:47:12,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 19:47:12,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 19:47:12,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 19:47:12,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 19:47:12,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 19:47:12,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 19:47:12,597 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 19:47:12,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 19:47:12,597 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 19:47:12,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 19:47:12,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 19:47:12,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 19:47:12,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 19:47:12,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 19:47:12,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:47:12,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 19:47:12,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 19:47:12,599 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 19:47:12,599 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 19:47:12,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 19:47:12,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 19:47:12,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 19:47:12,825 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 19:47:12,826 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 19:47:12,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c [2022-02-23 19:47:12,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b79165f6a/86d277f9d6cc441f8b59ed0e23f5f792/FLAG3d245b24e [2022-02-23 19:47:13,241 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 19:47:13,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c [2022-02-23 19:47:13,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b79165f6a/86d277f9d6cc441f8b59ed0e23f5f792/FLAG3d245b24e [2022-02-23 19:47:13,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b79165f6a/86d277f9d6cc441f8b59ed0e23f5f792 [2022-02-23 19:47:13,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 19:47:13,261 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 19:47:13,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 19:47:13,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 19:47:13,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 19:47:13,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:47:13" (1/1) ... [2022-02-23 19:47:13,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b103b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:47:13, skipping insertion in model container [2022-02-23 19:47:13,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:47:13" (1/1) ... [2022-02-23 19:47:13,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 19:47:13,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 19:47:13,399 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/ps6-ll_valuebound2.c[458,471] [2022-02-23 19:47:13,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:47:13,431 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 19:47:13,440 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/ps6-ll_valuebound2.c[458,471] [2022-02-23 19:47:13,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:47:13,454 INFO L208 MainTranslator]: Completed translation [2022-02-23 19:47:13,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:47:13 WrapperNode [2022-02-23 19:47:13,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 19:47:13,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 19:47:13,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 19:47:13,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 19:47:13,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:47:13" (1/1) ... [2022-02-23 19:47:13,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:47:13" (1/1) ... [2022-02-23 19:47:13,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:47:13" (1/1) ... [2022-02-23 19:47:13,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:47:13" (1/1) ... [2022-02-23 19:47:13,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:47:13" (1/1) ... [2022-02-23 19:47:13,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:47:13" (1/1) ... [2022-02-23 19:47:13,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:47:13" (1/1) ... [2022-02-23 19:47:13,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 19:47:13,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 19:47:13,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 19:47:13,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 19:47:13,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:47:13" (1/1) ... [2022-02-23 19:47:13,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:47:13,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:47:13,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 19:47:13,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 19:47:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 19:47:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 19:47:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 19:47:13,555 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 19:47:13,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 19:47:13,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 19:47:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 19:47:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 19:47:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 19:47:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 19:47:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-02-23 19:47:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 19:47:13,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 19:47:13,557 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 19:47:13,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 19:47:13,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 19:47:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 19:47:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 19:47:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 19:47:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 19:47:13,609 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 19:47:13,610 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 19:47:13,692 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 19:47:13,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 19:47:13,697 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 19:47:13,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:47:13 BoogieIcfgContainer [2022-02-23 19:47:13,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 19:47:13,699 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 19:47:13,700 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 19:47:13,700 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 19:47:13,703 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:47:13" (1/1) ... [2022-02-23 19:47:13,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:47:13 BasicIcfg [2022-02-23 19:47:13,733 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 19:47:13,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 19:47:13,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 19:47:13,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 19:47:13,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:47:13" (1/4) ... [2022-02-23 19:47:13,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501c7c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:47:13, skipping insertion in model container [2022-02-23 19:47:13,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:47:13" (2/4) ... [2022-02-23 19:47:13,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501c7c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:47:13, skipping insertion in model container [2022-02-23 19:47:13,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:47:13" (3/4) ... [2022-02-23 19:47:13,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501c7c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:47:13, skipping insertion in model container [2022-02-23 19:47:13,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:47:13" (4/4) ... [2022-02-23 19:47:13,755 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound2.cJordan [2022-02-23 19:47:13,759 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 19:47:13,759 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 19:47:13,802 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 19:47:13,807 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 19:47:13,808 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 19:47:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 19:47:13,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 19:47:13,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:47:13,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:47:13,825 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:47:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:47:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2022-02-23 19:47:13,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:47:13,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252184330] [2022-02-23 19:47:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:47:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:47:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:47:13,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:47:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:47:13,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 19:47:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:47:13,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 19:47:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:47:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 19:47:14,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:47:14,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252184330] [2022-02-23 19:47:14,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252184330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:47:14,005 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:47:14,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 19:47:14,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37125605] [2022-02-23 19:47:14,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:47:14,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 19:47:14,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:47:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 19:47:14,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 19:47:14,035 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 19:47:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:47:14,102 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-02-23 19:47:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 19:47:14,105 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-23 19:47:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:47:14,110 INFO L225 Difference]: With dead ends: 29 [2022-02-23 19:47:14,110 INFO L226 Difference]: Without dead ends: 24 [2022-02-23 19:47:14,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 19:47:14,117 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:47:14,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:47:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-23 19:47:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-23 19:47:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 19:47:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-02-23 19:47:14,143 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-02-23 19:47:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:47:14,143 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-02-23 19:47:14,143 INFO L471 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 19:47:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-02-23 19:47:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 19:47:14,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:47:14,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:47:14,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 19:47:14,145 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:47:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:47:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2022-02-23 19:47:14,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:47:14,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684797115] [2022-02-23 19:47:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:47:14,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:47:14,163 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:47:14,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394259670] [2022-02-23 19:47:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:47:14,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:47:14,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:47:14,166 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:47:14,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 19:47:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:47:14,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 19:47:14,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:47:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 19:47:14,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 19:47:14,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:47:14,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684797115] [2022-02-23 19:47:14,373 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:47:14,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394259670] [2022-02-23 19:47:14,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394259670] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:47:14,377 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:47:14,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 19:47:14,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365628401] [2022-02-23 19:47:14,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:47:14,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:47:14,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:47:14,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:47:14,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:47:14,382 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 19:47:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:47:14,463 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-02-23 19:47:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:47:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-02-23 19:47:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:47:14,466 INFO L225 Difference]: With dead ends: 33 [2022-02-23 19:47:14,466 INFO L226 Difference]: Without dead ends: 31 [2022-02-23 19:47:14,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 19:47:14,467 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:47:14,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:47:14,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-23 19:47:14,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-23 19:47:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:47:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-02-23 19:47:14,473 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-02-23 19:47:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:47:14,473 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-02-23 19:47:14,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 19:47:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-02-23 19:47:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 19:47:14,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:47:14,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:47:14,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 19:47:14,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:47:14,675 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:47:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:47:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2022-02-23 19:47:14,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:47:14,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061038063] [2022-02-23 19:47:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:47:14,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:47:14,690 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:47:14,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802109012] [2022-02-23 19:47:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:47:14,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:47:14,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:47:14,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:47:14,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 19:47:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:47:14,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 19:47:14,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:47:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 19:47:14,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:47:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-23 19:47:17,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:47:17,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061038063] [2022-02-23 19:47:17,494 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:47:17,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802109012] [2022-02-23 19:47:17,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802109012] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 19:47:17,495 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:47:17,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-23 19:47:17,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105823273] [2022-02-23 19:47:17,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:47:17,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:47:17,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:47:17,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:47:17,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2022-02-23 19:47:17,498 INFO L87 Difference]: Start difference. First operand 31 states and 34 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 19:47:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:47:17,546 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-02-23 19:47:17,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:47:17,546 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-02-23 19:47:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:47:17,547 INFO L225 Difference]: With dead ends: 35 [2022-02-23 19:47:17,548 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 19:47:17,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-02-23 19:47:17,549 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:47:17,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:47:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 19:47:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-23 19:47:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:47:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-02-23 19:47:17,555 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-02-23 19:47:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:47:17,555 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-02-23 19:47:17,555 INFO L471 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 19:47:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-02-23 19:47:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-23 19:47:17,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:47:17,556 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:47:17,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-23 19:47:17,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 19:47:17,761 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:47:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:47:17,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2022-02-23 19:47:17,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:47:17,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589968491] [2022-02-23 19:47:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:47:17,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:47:17,786 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:47:17,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646061103] [2022-02-23 19:47:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:47:17,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:47:17,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:47:17,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:47:17,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 19:47:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:47:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 19:47:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:47:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 19:47:18,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:47:18,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:47:18,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589968491] [2022-02-23 19:47:18,262 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:47:18,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646061103] [2022-02-23 19:47:18,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646061103] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:47:18,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:47:18,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-23 19:47:18,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749059759] [2022-02-23 19:47:18,262 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:47:18,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 19:47:18,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:47:18,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 19:47:18,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-23 19:47:18,266 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-23 19:47:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:47:18,343 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-02-23 19:47:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 19:47:18,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-02-23 19:47:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:47:18,345 INFO L225 Difference]: With dead ends: 40 [2022-02-23 19:47:18,345 INFO L226 Difference]: Without dead ends: 36 [2022-02-23 19:47:18,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-23 19:47:18,346 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:47:18,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:47:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-23 19:47:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-23 19:47:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 19:47:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-02-23 19:47:18,354 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-02-23 19:47:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:47:18,354 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-02-23 19:47:18,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-23 19:47:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-02-23 19:47:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 19:47:18,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:47:18,355 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:47:18,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 19:47:18,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:47:18,581 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:47:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:47:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2022-02-23 19:47:18,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:47:18,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151009900] [2022-02-23 19:47:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:47:18,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:47:18,595 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:47:18,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776196145] [2022-02-23 19:47:18,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:47:18,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:47:18,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:47:18,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:47:18,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 19:47:18,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:47:18,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:47:18,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 19:47:18,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:47:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 19:47:18,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:47:19,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:47:19,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151009900] [2022-02-23 19:47:19,036 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:47:19,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776196145] [2022-02-23 19:47:19,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776196145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 19:47:19,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:47:19,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-02-23 19:47:19,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861420450] [2022-02-23 19:47:19,037 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 19:47:19,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 19:47:19,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:47:19,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 19:47:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-23 19:47:19,039 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-02-23 19:47:19,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:47:19,122 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-02-23 19:47:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 19:47:19,123 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-02-23 19:47:19,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:47:19,123 INFO L225 Difference]: With dead ends: 43 [2022-02-23 19:47:19,123 INFO L226 Difference]: Without dead ends: 39 [2022-02-23 19:47:19,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-23 19:47:19,124 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:47:19,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:47:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-23 19:47:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-23 19:47:19,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 19:47:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-02-23 19:47:19,129 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-02-23 19:47:19,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:47:19,129 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-02-23 19:47:19,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-02-23 19:47:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-02-23 19:47:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-23 19:47:19,130 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:47:19,131 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:47:19,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 19:47:19,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:47:19,331 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:47:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:47:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2022-02-23 19:47:19,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:47:19,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389424721] [2022-02-23 19:47:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:47:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:47:19,342 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:47:19,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183897194] [2022-02-23 19:47:19,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 19:47:19,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:47:19,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:47:19,344 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 19:47:19,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 19:47:19,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 19:47:19,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:47:19,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 19:47:19,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:47:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 48 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-02-23 19:47:19,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:47:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-02-23 19:47:19,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:47:19,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389424721] [2022-02-23 19:47:19,783 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:47:19,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183897194] [2022-02-23 19:47:19,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183897194] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 19:47:19,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 19:47:19,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-02-23 19:47:19,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784870112] [2022-02-23 19:47:19,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 19:47:19,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 19:47:19,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:47:19,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 19:47:19,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-23 19:47:19,785 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2022-02-23 19:47:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:47:19,837 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-02-23 19:47:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 19:47:19,838 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 54 [2022-02-23 19:47:19,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:47:19,838 INFO L225 Difference]: With dead ends: 32 [2022-02-23 19:47:19,839 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 19:47:19,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-23 19:47:19,840 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:47:19,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 106 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:47:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 19:47:19,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 19:47:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 19:47:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 19:47:19,841 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2022-02-23 19:47:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:47:19,841 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 19:47:19,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 10 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2022-02-23 19:47:19,841 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 19:47:19,841 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 19:47:19,843 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 19:47:19,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 19:47:20,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:47:20,061 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-02-23 19:47:20,062 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 19:47:20,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:47:20 BasicIcfg [2022-02-23 19:47:20,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 19:47:20,064 INFO L158 Benchmark]: Toolchain (without parser) took 6803.77ms. Allocated memory was 175.1MB in the beginning and 243.3MB in the end (delta: 68.2MB). Free memory was 121.2MB in the beginning and 192.6MB in the end (delta: -71.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 19:47:20,065 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 175.1MB. Free memory is still 137.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 19:47:20,065 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.09ms. Allocated memory is still 175.1MB. Free memory was 121.0MB in the beginning and 147.8MB in the end (delta: -26.8MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. [2022-02-23 19:47:20,065 INFO L158 Benchmark]: Boogie Preprocessor took 20.91ms. Allocated memory is still 175.1MB. Free memory was 147.8MB in the beginning and 146.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 19:47:20,066 INFO L158 Benchmark]: RCFGBuilder took 221.85ms. Allocated memory is still 175.1MB. Free memory was 146.4MB in the beginning and 135.9MB in the end (delta: 10.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 19:47:20,066 INFO L158 Benchmark]: IcfgTransformer took 33.21ms. Allocated memory is still 175.1MB. Free memory was 135.9MB in the beginning and 134.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 19:47:20,066 INFO L158 Benchmark]: TraceAbstraction took 6330.12ms. Allocated memory was 175.1MB in the beginning and 243.3MB in the end (delta: 68.2MB). Free memory was 134.2MB in the beginning and 192.6MB in the end (delta: -58.4MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2022-02-23 19:47:20,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 175.1MB. Free memory is still 137.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 193.09ms. Allocated memory is still 175.1MB. Free memory was 121.0MB in the beginning and 147.8MB in the end (delta: -26.8MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.91ms. Allocated memory is still 175.1MB. Free memory was 147.8MB in the beginning and 146.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 221.85ms. Allocated memory is still 175.1MB. Free memory was 146.4MB in the beginning and 135.9MB in the end (delta: 10.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 33.21ms. Allocated memory is still 175.1MB. Free memory was 135.9MB in the beginning and 134.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 6330.12ms. Allocated memory was 175.1MB in the beginning and 243.3MB in the end (delta: 68.2MB). Free memory was 134.2MB in the beginning and 192.6MB in the end (delta: -58.4MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.3s, OverallIterations: 6, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 46 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38 mSDsluCounter, 658 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 499 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 187 IncrementalHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 159 mSDtfsCounter, 187 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 323 GetRequests, 275 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=5, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 214 NumberOfCodeBlocks, 214 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 289 ConstructedInterpolants, 0 QuantifiedInterpolants, 852 SizeOfPredicates, 7 NumberOfNonLiveVariables, 561 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 218/238 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 RESULT: Ultimate proved your program to be correct! [2022-02-23 19:47:20,095 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...