/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/dijkstra-u_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 22:00:10,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 22:00:10,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 22:00:10,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 22:00:10,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 22:00:10,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 22:00:10,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 22:00:10,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 22:00:10,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 22:00:10,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 22:00:10,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 22:00:10,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 22:00:10,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 22:00:10,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 22:00:10,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 22:00:10,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 22:00:10,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 22:00:10,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 22:00:10,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 22:00:10,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 22:00:10,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 22:00:10,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 22:00:10,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 22:00:10,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 22:00:10,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 22:00:10,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 22:00:10,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 22:00:10,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 22:00:10,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 22:00:10,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 22:00:10,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 22:00:10,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 22:00:10,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 22:00:10,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 22:00:10,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 22:00:10,393 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 22:00:10,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 22:00:10,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 22:00:10,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 22:00:10,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 22:00:10,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 22:00:10,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 22:00:10,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 22:00:10,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 22:00:10,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 22:00:10,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 22:00:10,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 22:00:10,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 22:00:10,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:00:10,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 22:00:10,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 22:00:10,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 22:00:10,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 22:00:10,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 22:00:10,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 22:00:10,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 22:00:10,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 22:00:10,396 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 22:00:10,396 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 22:00:10,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 22:00:10,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 22:00:10,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 22:00:10,598 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 22:00:10,599 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 22:00:10,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound20.c [2022-02-23 22:00:10,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307da5830/1d35e12d96ff4d39a720176562879159/FLAG8c1fa9da2 [2022-02-23 22:00:11,001 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 22:00:11,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound20.c [2022-02-23 22:00:11,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307da5830/1d35e12d96ff4d39a720176562879159/FLAG8c1fa9da2 [2022-02-23 22:00:11,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307da5830/1d35e12d96ff4d39a720176562879159 [2022-02-23 22:00:11,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 22:00:11,438 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 22:00:11,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 22:00:11,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 22:00:11,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 22:00:11,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:00:11" (1/1) ... [2022-02-23 22:00:11,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704bdecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:11, skipping insertion in model container [2022-02-23 22:00:11,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:00:11" (1/1) ... [2022-02-23 22:00:11,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 22:00:11,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 22:00:11,600 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/dijkstra-u_unwindbound20.c[525,538] [2022-02-23 22:00:11,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:00:11,628 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 22:00:11,636 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/dijkstra-u_unwindbound20.c[525,538] [2022-02-23 22:00:11,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:00:11,655 INFO L208 MainTranslator]: Completed translation [2022-02-23 22:00:11,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:11 WrapperNode [2022-02-23 22:00:11,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 22:00:11,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 22:00:11,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 22:00:11,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 22:00:11,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:11" (1/1) ... [2022-02-23 22:00:11,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:11" (1/1) ... [2022-02-23 22:00:11,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:11" (1/1) ... [2022-02-23 22:00:11,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:11" (1/1) ... [2022-02-23 22:00:11,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:11" (1/1) ... [2022-02-23 22:00:11,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:11" (1/1) ... [2022-02-23 22:00:11,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:11" (1/1) ... [2022-02-23 22:00:11,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 22:00:11,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 22:00:11,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 22:00:11,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 22:00:11,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:11" (1/1) ... [2022-02-23 22:00:11,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:00:11,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:11,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 22:00:11,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 22:00:11,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 22:00:11,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 22:00:11,761 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 22:00:11,761 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 22:00:11,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 22:00:11,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 22:00:11,761 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 22:00:11,761 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 22:00:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 22:00:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 22:00:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 22:00:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 22:00:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 22:00:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 22:00:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 22:00:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 22:00:11,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 22:00:11,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 22:00:11,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 22:00:11,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 22:00:11,811 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 22:00:11,812 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 22:00:11,919 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 22:00:11,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 22:00:11,923 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 22:00:11,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:00:11 BoogieIcfgContainer [2022-02-23 22:00:11,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 22:00:11,925 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 22:00:11,925 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 22:00:11,926 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 22:00:11,928 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:00:11" (1/1) ... [2022-02-23 22:00:11,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:00:11 BasicIcfg [2022-02-23 22:00:11,944 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 22:00:11,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 22:00:11,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 22:00:11,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 22:00:11,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:00:11" (1/4) ... [2022-02-23 22:00:11,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7fba99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:00:11, skipping insertion in model container [2022-02-23 22:00:11,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:00:11" (2/4) ... [2022-02-23 22:00:11,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7fba99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:00:11, skipping insertion in model container [2022-02-23 22:00:11,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:00:11" (3/4) ... [2022-02-23 22:00:11,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7fba99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:00:11, skipping insertion in model container [2022-02-23 22:00:11,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:00:11" (4/4) ... [2022-02-23 22:00:11,961 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound20.cqvasr [2022-02-23 22:00:11,964 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 22:00:11,965 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 22:00:12,029 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 22:00:12,034 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 22:00:12,034 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 22:00:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 22:00:12,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 22:00:12,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:12,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:12,066 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:12,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:12,070 INFO L85 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2022-02-23 22:00:12,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:12,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286590806] [2022-02-23 22:00:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:12,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:12,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:00:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:12,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:00:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:12,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:12,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286590806] [2022-02-23 22:00:12,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286590806] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:12,212 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:12,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:00:12,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530322227] [2022-02-23 22:00:12,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:12,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:00:12,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:00:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:00:12,238 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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) [2022-02-23 22:00:14,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:14,569 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2022-02-23 22:00:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:00:14,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 18 [2022-02-23 22:00:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:14,577 INFO L225 Difference]: With dead ends: 70 [2022-02-23 22:00:14,577 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 22:00:14,578 INFO L932 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 [2022-02-23 22:00:14,581 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:14,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-02-23 22:00:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 22:00:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-02-23 22:00:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 22:00:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-02-23 22:00:14,614 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2022-02-23 22:00:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:14,615 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-02-23 22:00:14,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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) [2022-02-23 22:00:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-02-23 22:00:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-23 22:00:14,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:14,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:14,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 22:00:14,626 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:14,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:14,629 INFO L85 PathProgramCache]: Analyzing trace with hash -889932734, now seen corresponding path program 1 times [2022-02-23 22:00:14,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:14,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490820553] [2022-02-23 22:00:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:14,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:14,650 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:14,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899839119] [2022-02-23 22:00:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:14,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:14,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:14,653 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:00:14,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 22:00:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:14,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 22:00:14,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:14,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:00:14,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:14,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490820553] [2022-02-23 22:00:14,835 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:00:14,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899839119] [2022-02-23 22:00:14,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899839119] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:14,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:14,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 22:00:14,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709831689] [2022-02-23 22:00:14,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:14,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 22:00:14,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:14,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 22:00:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 22:00:14,839 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-02-23 22:00:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:14,867 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2022-02-23 22:00:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 22:00:14,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 20 [2022-02-23 22:00:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:14,871 INFO L225 Difference]: With dead ends: 55 [2022-02-23 22:00:14,871 INFO L226 Difference]: Without dead ends: 36 [2022-02-23 22:00:14,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 22:00:14,874 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 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 [2022-02-23 22:00:14,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:00:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-23 22:00:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-23 22:00:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 22:00:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-02-23 22:00:14,883 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-02-23 22:00:14,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:14,883 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-02-23 22:00:14,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-02-23 22:00:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-02-23 22:00:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 22:00:14,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:14,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:14,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 22:00:15,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:15,102 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1699853977, now seen corresponding path program 1 times [2022-02-23 22:00:15,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:15,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545128410] [2022-02-23 22:00:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:15,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:15,127 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:15,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825203277] [2022-02-23 22:00:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:15,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:15,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:15,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:00:15,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 22:00:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:15,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:00:15,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:15,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:00:15,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:15,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545128410] [2022-02-23 22:00:15,238 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:00:15,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825203277] [2022-02-23 22:00:15,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825203277] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:15,239 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:15,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:00:15,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090487342] [2022-02-23 22:00:15,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:15,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:00:15,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:15,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:00:15,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:00:15,240 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-02-23 22:00:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:15,269 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-02-23 22:00:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:00:15,270 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), 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 21 [2022-02-23 22:00:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:15,271 INFO L225 Difference]: With dead ends: 49 [2022-02-23 22:00:15,271 INFO L226 Difference]: Without dead ends: 40 [2022-02-23 22:00:15,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:00:15,272 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:15,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:00:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-23 22:00:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-02-23 22:00:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 22:00:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-02-23 22:00:15,278 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2022-02-23 22:00:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:15,278 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-02-23 22:00:15,278 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), 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) [2022-02-23 22:00:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-02-23 22:00:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 22:00:15,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:15,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:15,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 22:00:15,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 22:00:15,480 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:15,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1700986035, now seen corresponding path program 1 times [2022-02-23 22:00:15,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:15,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754133590] [2022-02-23 22:00:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:15,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:15,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:00:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:15,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:00:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:15,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:15,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754133590] [2022-02-23 22:00:15,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754133590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:00:15,680 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:00:15,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 22:00:15,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502006424] [2022-02-23 22:00:15,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:00:15,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 22:00:15,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 22:00:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:00:15,682 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 22:00:17,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:19,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:19,848 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2022-02-23 22:00:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 22:00:19,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 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 21 [2022-02-23 22:00:19,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:19,851 INFO L225 Difference]: With dead ends: 72 [2022-02-23 22:00:19,851 INFO L226 Difference]: Without dead ends: 51 [2022-02-23 22:00:19,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:00:19,852 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:19,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 133 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-02-23 22:00:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-23 22:00:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-23 22:00:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 22:00:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-02-23 22:00:19,874 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2022-02-23 22:00:19,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:19,874 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-02-23 22:00:19,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 22:00:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-02-23 22:00:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 22:00:19,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:19,875 INFO L514 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] [2022-02-23 22:00:19,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 22:00:19,875 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:19,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1908885951, now seen corresponding path program 1 times [2022-02-23 22:00:19,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:19,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454087696] [2022-02-23 22:00:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:19,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:19,892 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:19,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955161258] [2022-02-23 22:00:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:19,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:19,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:19,915 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:00:19,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 22:00:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:19,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:00:19,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:20,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:00:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:20,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:20,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454087696] [2022-02-23 22:00:20,105 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:00:20,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955161258] [2022-02-23 22:00:20,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955161258] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:00:20,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:00:20,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 22:00:20,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464062397] [2022-02-23 22:00:20,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:00:20,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 22:00:20,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 22:00:20,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 22:00:20,109 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 22:00:22,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:00:24,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:00:26,720 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:00:28,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:00:30,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:32,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:35,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:37,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:40,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:00:42,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:00:42,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:00:42,486 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2022-02-23 22:00:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 22:00:42,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-02-23 22:00:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:00:42,497 INFO L225 Difference]: With dead ends: 104 [2022-02-23 22:00:42,497 INFO L226 Difference]: Without dead ends: 85 [2022-02-23 22:00:42,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:00:42,498 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 59 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-02-23 22:00:42,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 286 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 9 Unknown, 0 Unchecked, 22.3s Time] [2022-02-23 22:00:42,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-23 22:00:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2022-02-23 22:00:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 22:00:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-02-23 22:00:42,527 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 23 [2022-02-23 22:00:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:00:42,528 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-02-23 22:00:42,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 22:00:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-02-23 22:00:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 22:00:42,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:00:42,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:00:42,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-23 22:00:42,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:42,754 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:00:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:00:42,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1731080004, now seen corresponding path program 1 times [2022-02-23 22:00:42,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:00:42,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508445569] [2022-02-23 22:00:42,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:42,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:00:42,762 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:00:42,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573657003] [2022-02-23 22:00:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:00:42,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:00:42,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:00:42,772 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:00:42,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 22:00:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:00:42,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 22:00:42,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:00:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:42,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:00:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:00:42,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:00:42,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508445569] [2022-02-23 22:00:42,939 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:00:42,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573657003] [2022-02-23 22:00:42,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573657003] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:00:42,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:00:42,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 22:00:42,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871988465] [2022-02-23 22:00:42,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:00:42,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 22:00:42,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:00:42,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 22:00:42,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 22:00:42,940 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 22:00:45,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:47,033 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:52,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.33s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:00:57,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.65s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:01,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.68s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:03,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:06,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:12,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:01:12,999 INFO L93 Difference]: Finished difference Result 138 states and 192 transitions. [2022-02-23 22:01:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 22:01:12,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-02-23 22:01:13,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:01:13,001 INFO L225 Difference]: With dead ends: 138 [2022-02-23 22:01:13,001 INFO L226 Difference]: Without dead ends: 129 [2022-02-23 22:01:13,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:01:13,002 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 154 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 78 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:01:13,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 256 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 115 Invalid, 8 Unknown, 0 Unchecked, 30.0s Time] [2022-02-23 22:01:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-23 22:01:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2022-02-23 22:01:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 70 states have internal predecessors, (87), 46 states have call successors, (46), 9 states have call predecessors, (46), 8 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-02-23 22:01:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 173 transitions. [2022-02-23 22:01:13,017 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 173 transitions. Word has length 24 [2022-02-23 22:01:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:01:13,017 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 173 transitions. [2022-02-23 22:01:13,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 22:01:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 173 transitions. [2022-02-23 22:01:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 22:01:13,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:01:13,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:01:13,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 22:01:13,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:01:13,237 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:01:13,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:01:13,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1729947946, now seen corresponding path program 1 times [2022-02-23 22:01:13,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:01:13,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408980088] [2022-02-23 22:01:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:01:13,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:01:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:01:13,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:01:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:01:13,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:01:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:01:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:01:13,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:01:13,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408980088] [2022-02-23 22:01:13,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408980088] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:01:13,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687558218] [2022-02-23 22:01:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:01:13,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:01:13,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:01:13,459 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:01:13,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 22:01:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:01:13,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 22:01:13,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:01:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:01:13,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:01:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:01:13,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687558218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:01:13,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 22:01:13,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-23 22:01:13,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484159269] [2022-02-23 22:01:13,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 22:01:13,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 22:01:13,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:01:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 22:01:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-23 22:01:13,769 INFO L87 Difference]: Start difference. First operand 120 states and 173 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 22:01:18,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:01:20,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:22,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:24,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:27,027 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:29,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:31,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:32,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:34,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:38,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:01:40,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:42,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:01:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:01:43,981 INFO L93 Difference]: Finished difference Result 194 states and 284 transitions. [2022-02-23 22:01:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 22:01:43,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-02-23 22:01:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:01:43,983 INFO L225 Difference]: With dead ends: 194 [2022-02-23 22:01:43,984 INFO L226 Difference]: Without dead ends: 177 [2022-02-23 22:01:43,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-23 22:01:43,985 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 46 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 121 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:01:43,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 297 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 495 Invalid, 10 Unknown, 0 Unchecked, 30.1s Time] [2022-02-23 22:01:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-23 22:01:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2022-02-23 22:01:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 100 states have internal predecessors, (118), 65 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2022-02-23 22:01:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 240 transitions. [2022-02-23 22:01:44,022 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 240 transitions. Word has length 24 [2022-02-23 22:01:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:01:44,023 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 240 transitions. [2022-02-23 22:01:44,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 22:01:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 240 transitions. [2022-02-23 22:01:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 22:01:44,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:01:44,028 INFO L514 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] [2022-02-23 22:01:44,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 22:01:44,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:01:44,244 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:01:44,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:01:44,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2026335537, now seen corresponding path program 1 times [2022-02-23 22:01:44,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:01:44,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887584462] [2022-02-23 22:01:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:01:44,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:01:44,253 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:01:44,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300352107] [2022-02-23 22:01:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:01:44,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:01:44,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:01:44,257 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:01:44,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 22:01:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:01:44,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 22:01:44,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:01:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:01:44,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:01:44,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:01:44,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887584462] [2022-02-23 22:01:44,517 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:01:44,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300352107] [2022-02-23 22:01:44,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300352107] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:01:44,517 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:01:44,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:01:44,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055707971] [2022-02-23 22:01:44,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:01:44,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:01:44,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:01:44,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:01:44,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:01:44,520 INFO L87 Difference]: Start difference. First operand 170 states and 240 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), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 22:01:46,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:01:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:01:46,869 INFO L93 Difference]: Finished difference Result 176 states and 244 transitions. [2022-02-23 22:01:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:01:46,870 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), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-02-23 22:01:46,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:01:46,873 INFO L225 Difference]: With dead ends: 176 [2022-02-23 22:01:46,873 INFO L226 Difference]: Without dead ends: 152 [2022-02-23 22:01:46,873 INFO L932 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 [2022-02-23 22:01:46,874 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-23 22:01:46,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 171 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-02-23 22:01:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-23 22:01:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-02-23 22:01:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 83 states have (on average 1.2891566265060241) internal successors, (107), 90 states have internal predecessors, (107), 58 states have call successors, (58), 11 states have call predecessors, (58), 10 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-23 22:01:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 216 transitions. [2022-02-23 22:01:46,892 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 216 transitions. Word has length 31 [2022-02-23 22:01:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:01:46,892 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 216 transitions. [2022-02-23 22:01:46,892 INFO L471 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), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 22:01:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 216 transitions. [2022-02-23 22:01:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 22:01:46,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:01:46,893 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:01:46,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 22:01:47,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:01:47,097 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:01:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:01:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash -266035918, now seen corresponding path program 1 times [2022-02-23 22:01:47,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:01:47,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464539838] [2022-02-23 22:01:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:01:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:01:47,105 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:01:47,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116477399] [2022-02-23 22:01:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:01:47,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:01:47,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:01:47,119 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:01:47,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 22:01:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:01:47,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:01:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:01:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-23 22:01:47,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:01:47,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:01:47,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464539838] [2022-02-23 22:01:47,317 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:01:47,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116477399] [2022-02-23 22:01:47,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116477399] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:01:47,317 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:01:47,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:01:47,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146217349] [2022-02-23 22:01:47,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:01:47,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:01:47,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:01:47,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:01:47,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:01:47,318 INFO L87 Difference]: Start difference. First operand 152 states and 216 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (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 22:01:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:01:47,934 INFO L93 Difference]: Finished difference Result 182 states and 241 transitions. [2022-02-23 22:01:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:01:47,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (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 34 [2022-02-23 22:01:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:01:47,936 INFO L225 Difference]: With dead ends: 182 [2022-02-23 22:01:47,936 INFO L226 Difference]: Without dead ends: 177 [2022-02-23 22:01:47,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:01:47,937 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 22:01:47,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 172 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 22:01:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-23 22:01:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2022-02-23 22:01:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 101 states have internal predecessors, (113), 55 states have call successors, (55), 18 states have call predecessors, (55), 17 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-23 22:01:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 219 transitions. [2022-02-23 22:01:47,958 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 219 transitions. Word has length 34 [2022-02-23 22:01:47,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:01:47,958 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 219 transitions. [2022-02-23 22:01:47,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (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 22:01:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 219 transitions. [2022-02-23 22:01:47,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 22:01:47,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:01:47,959 INFO L514 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] [2022-02-23 22:01:47,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 22:01:48,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:01:48,164 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:01:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:01:48,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1209382940, now seen corresponding path program 1 times [2022-02-23 22:01:48,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:01:48,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457411588] [2022-02-23 22:01:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:01:48,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:01:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:01:48,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:01:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:01:48,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:01:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:01:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:01:48,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:01:48,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457411588] [2022-02-23 22:01:48,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457411588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:01:48,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958161344] [2022-02-23 22:01:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:01:48,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:01:48,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:01:48,285 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:01:48,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 22:01:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:01:48,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 22:01:48,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:01:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:01:48,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:01:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:01:48,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958161344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:01:48,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 22:01:48,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-02-23 22:01:48,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788779581] [2022-02-23 22:01:48,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 22:01:48,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 22:01:48,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:01:48,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 22:01:48,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-02-23 22:01:48,596 INFO L87 Difference]: Start difference. First operand 170 states and 219 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 22:01:53,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:01:55,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:00,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:02:02,983 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:04,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:07,750 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:10,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:16,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:02:21,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 22:02:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:02:21,523 INFO L93 Difference]: Finished difference Result 356 states and 457 transitions. [2022-02-23 22:02:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-23 22:02:21,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-02-23 22:02:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:02:21,525 INFO L225 Difference]: With dead ends: 356 [2022-02-23 22:02:21,525 INFO L226 Difference]: Without dead ends: 316 [2022-02-23 22:02:21,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2022-02-23 22:02:21,526 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 192 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 123 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2022-02-23 22:02:21,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 220 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 525 Invalid, 9 Unknown, 0 Unchecked, 32.7s Time] [2022-02-23 22:02:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-23 22:02:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 279. [2022-02-23 22:02:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 163 states have (on average 1.1840490797546013) internal successors, (193), 170 states have internal predecessors, (193), 87 states have call successors, (87), 29 states have call predecessors, (87), 28 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-02-23 22:02:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 361 transitions. [2022-02-23 22:02:21,544 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 361 transitions. Word has length 32 [2022-02-23 22:02:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:02:21,545 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 361 transitions. [2022-02-23 22:02:21,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 22:02:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 361 transitions. [2022-02-23 22:02:21,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 22:02:21,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:02:21,546 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:02:21,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-23 22:02:21,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 22:02:21,764 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:02:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:02:21,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1556551492, now seen corresponding path program 2 times [2022-02-23 22:02:21,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:02:21,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318338560] [2022-02-23 22:02:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:21,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:02:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:21,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:02:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:21,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:02:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:02:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 22:02:21,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:02:21,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318338560] [2022-02-23 22:02:21,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318338560] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:02:21,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448768690] [2022-02-23 22:02:21,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:02:21,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:02:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:02:21,949 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:02:21,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 22:02:21,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-02-23 22:02:21,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:02:21,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 22:02:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:02:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-02-23 22:02:22,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:02:22,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448768690] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:02:22,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:02:22,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2022-02-23 22:02:22,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197057139] [2022-02-23 22:02:22,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:02:22,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:02:22,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:02:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:02:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-02-23 22:02:22,077 INFO L87 Difference]: Start difference. First operand 279 states and 361 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-02-23 22:02:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:02:22,115 INFO L93 Difference]: Finished difference Result 316 states and 410 transitions. [2022-02-23 22:02:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:02:22,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 50 [2022-02-23 22:02:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:02:22,118 INFO L225 Difference]: With dead ends: 316 [2022-02-23 22:02:22,119 INFO L226 Difference]: Without dead ends: 276 [2022-02-23 22:02:22,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-02-23 22:02:22,120 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:02:22,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:02:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-02-23 22:02:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 186. [2022-02-23 22:02:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 113 states have internal predecessors, (126), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2022-02-23 22:02:22,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 234 transitions. [2022-02-23 22:02:22,140 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 234 transitions. Word has length 50 [2022-02-23 22:02:22,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:02:22,141 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 234 transitions. [2022-02-23 22:02:22,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-02-23 22:02:22,141 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 234 transitions. [2022-02-23 22:02:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-23 22:02:22,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:02:22,147 INFO L514 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, 1, 1, 1] [2022-02-23 22:02:22,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 22:02:22,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:02:22,364 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:02:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:02:22,365 INFO L85 PathProgramCache]: Analyzing trace with hash -926681017, now seen corresponding path program 1 times [2022-02-23 22:02:22,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:02:22,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933433084] [2022-02-23 22:02:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:22,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:02:22,387 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:02:22,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833153469] [2022-02-23 22:02:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:02:22,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:02:22,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:02:22,389 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:02:22,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process