/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 07:04:50,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 07:04:50,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 07:04:51,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 07:04:51,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 07:04:51,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 07:04:51,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 07:04:51,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 07:04:51,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 07:04:51,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 07:04:51,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 07:04:51,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 07:04:51,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 07:04:51,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 07:04:51,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 07:04:51,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 07:04:51,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 07:04:51,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 07:04:51,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 07:04:51,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 07:04:51,048 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 07:04:51,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 07:04:51,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 07:04:51,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 07:04:51,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 07:04:51,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 07:04:51,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 07:04:51,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 07:04:51,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 07:04:51,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 07:04:51,078 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 07:04:51,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 07:04:51,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 07:04:51,079 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 07:04:51,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 07:04:51,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 07:04:51,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 07:04:51,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 07:04:51,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 07:04:51,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 07:04:51,081 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 07:04:51,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 07:04:51,081 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 07:04:51,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 07:04:51,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 07:04:51,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 07:04:51,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 07:04:51,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 07:04:51,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 07:04:51,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 07:04:51,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 07:04:51,083 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 07:04:51,083 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 07:04:51,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 07:04:51,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 07:04:51,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 07:04:51,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 07:04:51,325 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 07:04:51,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-03-20 07:04:51,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4baa98a7/bffe765994d24a9f8a1c1ef820f592e8/FLAGf65836974 [2022-03-20 07:04:51,789 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 07:04:51,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-03-20 07:04:51,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4baa98a7/bffe765994d24a9f8a1c1ef820f592e8/FLAGf65836974 [2022-03-20 07:04:52,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4baa98a7/bffe765994d24a9f8a1c1ef820f592e8 [2022-03-20 07:04:52,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 07:04:52,227 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 07:04:52,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 07:04:52,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 07:04:52,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 07:04:52,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:04:52" (1/1) ... [2022-03-20 07:04:52,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c61979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:04:52, skipping insertion in model container [2022-03-20 07:04:52,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:04:52" (1/1) ... [2022-03-20 07:04:52,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 07:04:52,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 07:04:52,417 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/ps4-ll_valuebound50.c[458,471] [2022-03-20 07:04:52,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 07:04:52,439 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 07:04:52,449 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/ps4-ll_valuebound50.c[458,471] [2022-03-20 07:04:52,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 07:04:52,464 INFO L208 MainTranslator]: Completed translation [2022-03-20 07:04:52,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:04:52 WrapperNode [2022-03-20 07:04:52,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 07:04:52,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 07:04:52,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 07:04:52,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 07:04:52,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:04:52" (1/1) ... [2022-03-20 07:04:52,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:04:52" (1/1) ... [2022-03-20 07:04:52,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:04:52" (1/1) ... [2022-03-20 07:04:52,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:04:52" (1/1) ... [2022-03-20 07:04:52,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:04:52" (1/1) ... [2022-03-20 07:04:52,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:04:52" (1/1) ... [2022-03-20 07:04:52,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:04:52" (1/1) ... [2022-03-20 07:04:52,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 07:04:52,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 07:04:52,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 07:04:52,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 07:04:52,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:04:52" (1/1) ... [2022-03-20 07:04:52,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 07:04:52,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:04:52,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 07:04:52,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 07:04:52,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 07:04:52,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 07:04:52,556 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 07:04:52,556 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 07:04:52,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 07:04:52,556 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 07:04:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 07:04:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 07:04:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 07:04:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 07:04:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 07:04:52,557 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 07:04:52,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 07:04:52,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 07:04:52,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 07:04:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 07:04:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 07:04:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 07:04:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 07:04:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 07:04:52,620 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 07:04:52,622 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 07:04:52,758 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 07:04:52,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 07:04:52,763 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 07:04:52,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:04:52 BoogieIcfgContainer [2022-03-20 07:04:52,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 07:04:52,765 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 07:04:52,765 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 07:04:52,766 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 07:04:52,769 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:04:52" (1/1) ... [2022-03-20 07:04:52,771 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 07:04:52,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 07:04:52 BasicIcfg [2022-03-20 07:04:52,783 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 07:04:52,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 07:04:52,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 07:04:52,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 07:04:52,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:04:52" (1/4) ... [2022-03-20 07:04:52,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a69ec76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:04:52, skipping insertion in model container [2022-03-20 07:04:52,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:04:52" (2/4) ... [2022-03-20 07:04:52,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a69ec76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:04:52, skipping insertion in model container [2022-03-20 07:04:52,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:04:52" (3/4) ... [2022-03-20 07:04:52,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a69ec76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 07:04:52, skipping insertion in model container [2022-03-20 07:04:52,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 07:04:52" (4/4) ... [2022-03-20 07:04:52,790 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound50.cJordan [2022-03-20 07:04:52,794 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 07:04:52,795 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 07:04:52,829 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 07:04:52,834 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 07:04:52,834 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 07:04:52,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 07:04:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 07:04:52,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:04:52,852 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:04:52,852 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:04:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:04:52,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2022-03-20 07:04:52,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:04:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721387057] [2022-03-20 07:04:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:52,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:04:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:04:52,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:04:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:04:53,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 07:04:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:04:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:04:53,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:04:53,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721387057] [2022-03-20 07:04:53,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721387057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:04:53,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:04:53,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 07:04:53,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406872911] [2022-03-20 07:04:53,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:04:53,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 07:04:53,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:04:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 07:04:53,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 07:04:53,059 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:04:53,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:04:53,103 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-03-20 07:04:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 07:04:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 07:04:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:04:53,112 INFO L225 Difference]: With dead ends: 28 [2022-03-20 07:04:53,112 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 07:04:53,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 07:04:53,116 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:04:53,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:04:53,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 07:04:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 07:04:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 07:04:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-20 07:04:53,146 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-03-20 07:04:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:04:53,146 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-20 07:04:53,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:04:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-20 07:04:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 07:04:53,147 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:04:53,147 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:04:53,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 07:04:53,148 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:04:53,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:04:53,149 INFO L85 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2022-03-20 07:04:53,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:04:53,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023097120] [2022-03-20 07:04:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:53,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:04:53,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:04:53,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929056701] [2022-03-20 07:04:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:53,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:53,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:04:53,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:04:53,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 07:04:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:04:53,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 07:04:53,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:04:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:04:53,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 07:04:53,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:04:53,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023097120] [2022-03-20 07:04:53,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:04:53,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929056701] [2022-03-20 07:04:53,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929056701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:04:53,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:04:53,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 07:04:53,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561021176] [2022-03-20 07:04:53,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:04:53,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 07:04:53,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:04:53,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 07:04:53,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:04:53,327 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:04:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:04:53,385 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-20 07:04:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 07:04:53,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 17 [2022-03-20 07:04:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:04:53,388 INFO L225 Difference]: With dead ends: 32 [2022-03-20 07:04:53,388 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 07:04:53,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 07:04:53,389 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:04:53,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:04:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 07:04:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 07:04:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 07:04:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-20 07:04:53,397 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-20 07:04:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:04:53,397 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-20 07:04:53,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:04:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-20 07:04:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 07:04:53,398 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:04:53,398 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:04:53,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 07:04:53,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:53,620 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:04:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:04:53,621 INFO L85 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2022-03-20 07:04:53,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:04:53,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454697460] [2022-03-20 07:04:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:53,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:04:53,637 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:04:53,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788471990] [2022-03-20 07:04:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:53,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:53,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:04:53,639 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:04:53,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 07:04:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:04:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 07:04:53,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:04:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:04:53,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:04:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 07:04:54,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:04:54,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454697460] [2022-03-20 07:04:54,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:04:54,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788471990] [2022-03-20 07:04:54,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788471990] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 07:04:54,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:04:54,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 07:04:54,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954734370] [2022-03-20 07:04:54,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:04:54,182 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 07:04:54,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:04:54,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 07:04:54,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 07:04:54,183 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 07:04:54,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:04:54,231 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-03-20 07:04:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 07:04:54,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-20 07:04:54,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:04:54,233 INFO L225 Difference]: With dead ends: 34 [2022-03-20 07:04:54,233 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 07:04:54,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 07:04:54,234 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:04:54,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:04:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 07:04:54,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 07:04:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 07:04:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-20 07:04:54,242 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-03-20 07:04:54,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:04:54,242 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-20 07:04:54,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 07:04:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-20 07:04:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 07:04:54,243 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:04:54,243 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:04:54,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 07:04:54,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 07:04:54,460 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:04:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:04:54,460 INFO L85 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2022-03-20 07:04:54,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:04:54,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430610112] [2022-03-20 07:04:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:54,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:04:54,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:04:54,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038873679] [2022-03-20 07:04:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:54,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:54,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:04:54,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:04:54,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 07:04:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:04:54,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 07:04:54,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:04:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 07:04:54,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:04:55,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:04:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430610112] [2022-03-20 07:04:55,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:04:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038873679] [2022-03-20 07:04:55,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038873679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:04:55,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:04:55,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 07:04:55,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492327673] [2022-03-20 07:04:55,021 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:04:55,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 07:04:55,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:04:55,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 07:04:55,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 07:04:55,022 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 07:04:55,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:04:55,087 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-03-20 07:04:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 07:04:55,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-03-20 07:04:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:04:55,089 INFO L225 Difference]: With dead ends: 37 [2022-03-20 07:04:55,089 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 07:04:55,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 07:04:55,095 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:04:55,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:04:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 07:04:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 07:04:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 07:04:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-20 07:04:55,100 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-03-20 07:04:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:04:55,101 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-20 07:04:55,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 07:04:55,101 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-20 07:04:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 07:04:55,102 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:04:55,102 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:04:55,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 07:04:55,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:55,332 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:04:55,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:04:55,332 INFO L85 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2022-03-20 07:04:55,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:04:55,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604567995] [2022-03-20 07:04:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:55,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:04:55,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:04:55,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858607997] [2022-03-20 07:04:55,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 07:04:55,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:55,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:04:55,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:04:55,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 07:04:55,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 07:04:55,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:04:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 07:04:55,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:04:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 07:04:55,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:04:55,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:04:55,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604567995] [2022-03-20 07:04:55,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:04:55,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858607997] [2022-03-20 07:04:55,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858607997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:04:55,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:04:55,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 07:04:55,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931752191] [2022-03-20 07:04:55,876 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:04:55,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 07:04:55,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:04:55,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 07:04:55,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 07:04:55,877 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 07:04:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:04:55,953 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-03-20 07:04:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 07:04:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-20 07:04:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:04:55,954 INFO L225 Difference]: With dead ends: 40 [2022-03-20 07:04:55,955 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 07:04:55,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 07:04:55,956 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:04:55,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:04:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 07:04:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 07:04:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 07:04:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-20 07:04:55,961 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-03-20 07:04:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:04:55,962 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-20 07:04:55,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 07:04:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-20 07:04:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 07:04:55,963 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:04:55,963 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:04:55,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 07:04:56,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:56,175 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:04:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:04:56,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2022-03-20 07:04:56,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:04:56,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442687947] [2022-03-20 07:04:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:56,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:04:56,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:04:56,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875908403] [2022-03-20 07:04:56,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 07:04:56,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:56,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:04:56,202 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:04:56,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 07:04:56,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 07:04:56,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:04:56,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 07:04:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:04:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 07:04:56,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:04:56,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:04:56,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442687947] [2022-03-20 07:04:56,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:04:56,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875908403] [2022-03-20 07:04:56,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875908403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:04:56,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:04:56,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 07:04:56,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995117947] [2022-03-20 07:04:56,696 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:04:56,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 07:04:56,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:04:56,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 07:04:56,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 07:04:56,698 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 07:04:56,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:04:56,779 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-03-20 07:04:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 07:04:56,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-03-20 07:04:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:04:56,780 INFO L225 Difference]: With dead ends: 43 [2022-03-20 07:04:56,780 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 07:04:56,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 07:04:56,781 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:04:56,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:04:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 07:04:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-20 07:04:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 07:04:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-20 07:04:56,786 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-03-20 07:04:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:04:56,787 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-20 07:04:56,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 07:04:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-20 07:04:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 07:04:56,788 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:04:56,788 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:04:56,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 07:04:56,993 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:56,994 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:04:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:04:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1178929216, now seen corresponding path program 4 times [2022-03-20 07:04:56,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:04:56,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880862186] [2022-03-20 07:04:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:56,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:04:57,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:04:57,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803803514] [2022-03-20 07:04:57,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 07:04:57,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:57,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:04:57,022 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:04:57,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 07:04:57,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 07:04:57,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:04:57,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 07:04:57,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:04:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 07:04:57,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:04:57,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:04:57,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880862186] [2022-03-20 07:04:57,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:04:57,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803803514] [2022-03-20 07:04:57,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803803514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:04:57,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:04:57,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 07:04:57,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20993783] [2022-03-20 07:04:57,663 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:04:57,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 07:04:57,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:04:57,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 07:04:57,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 07:04:57,665 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 07:04:57,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:04:57,771 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-03-20 07:04:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 07:04:57,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-03-20 07:04:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:04:57,773 INFO L225 Difference]: With dead ends: 46 [2022-03-20 07:04:57,773 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 07:04:57,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 07:04:57,774 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:04:57,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:04:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 07:04:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 07:04:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 07:04:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-20 07:04:57,779 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-03-20 07:04:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:04:57,779 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-20 07:04:57,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 07:04:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-20 07:04:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 07:04:57,780 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:04:57,781 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:04:57,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 07:04:57,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:57,981 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:04:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:04:57,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1658817134, now seen corresponding path program 5 times [2022-03-20 07:04:57,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:04:57,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532984711] [2022-03-20 07:04:57,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:57,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:04:57,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:04:57,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264729274] [2022-03-20 07:04:57,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 07:04:57,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:57,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:04:57,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:04:58,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 07:04:58,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 07:04:58,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:04:58,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 07:04:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:04:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 07:04:58,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:04:58,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:04:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532984711] [2022-03-20 07:04:58,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:04:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264729274] [2022-03-20 07:04:58,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264729274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:04:58,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:04:58,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 07:04:58,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600784117] [2022-03-20 07:04:58,458 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:04:58,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 07:04:58,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:04:58,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 07:04:58,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 07:04:58,459 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 07:04:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:04:58,578 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-03-20 07:04:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 07:04:58,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-03-20 07:04:58,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:04:58,580 INFO L225 Difference]: With dead ends: 49 [2022-03-20 07:04:58,580 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 07:04:58,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 07:04:58,581 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:04:58,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 297 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:04:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 07:04:58,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 07:04:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 07:04:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-20 07:04:58,586 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-03-20 07:04:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:04:58,587 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-20 07:04:58,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 07:04:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-20 07:04:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 07:04:58,588 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:04:58,588 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:04:58,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 07:04:58,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:58,789 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:04:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:04:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash 270583808, now seen corresponding path program 6 times [2022-03-20 07:04:58,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:04:58,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202873224] [2022-03-20 07:04:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:58,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:04:58,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:04:58,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649340457] [2022-03-20 07:04:58,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 07:04:58,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:58,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:04:58,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:04:58,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 07:04:58,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 07:04:58,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:04:58,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 07:04:58,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:04:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 07:04:59,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:04:59,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:04:59,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202873224] [2022-03-20 07:04:59,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:04:59,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649340457] [2022-03-20 07:04:59,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649340457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:04:59,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:04:59,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 07:04:59,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284004622] [2022-03-20 07:04:59,375 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:04:59,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 07:04:59,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:04:59,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 07:04:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 07:04:59,377 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 07:04:59,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:04:59,530 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-03-20 07:04:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 07:04:59,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2022-03-20 07:04:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:04:59,532 INFO L225 Difference]: With dead ends: 52 [2022-03-20 07:04:59,532 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 07:04:59,532 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-20 07:04:59,533 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:04:59,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 349 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:04:59,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 07:04:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-20 07:04:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 07:04:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-03-20 07:04:59,537 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-03-20 07:04:59,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:04:59,538 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-03-20 07:04:59,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 07:04:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-03-20 07:04:59,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 07:04:59,539 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:04:59,539 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:04:59,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 07:04:59,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 07:04:59,747 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:04:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:04:59,748 INFO L85 PathProgramCache]: Analyzing trace with hash 4292050, now seen corresponding path program 7 times [2022-03-20 07:04:59,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:04:59,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188684431] [2022-03-20 07:04:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:04:59,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:04:59,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:04:59,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453966289] [2022-03-20 07:04:59,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 07:04:59,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:04:59,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:04:59,766 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:04:59,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 07:05:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:05:00,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 07:05:00,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:05:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 07:05:00,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:05:00,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:05:00,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188684431] [2022-03-20 07:05:00,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:05:00,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453966289] [2022-03-20 07:05:00,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453966289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:05:00,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:05:00,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 07:05:00,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650261013] [2022-03-20 07:05:00,699 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:05:00,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 07:05:00,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:05:00,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 07:05:00,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-20 07:05:00,701 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 07:05:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:05:00,874 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-03-20 07:05:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 07:05:00,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2022-03-20 07:05:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:05:00,875 INFO L225 Difference]: With dead ends: 55 [2022-03-20 07:05:00,876 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 07:05:00,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-20 07:05:00,876 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:05:00,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:05:00,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 07:05:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 07:05:00,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 07:05:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-03-20 07:05:00,882 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-03-20 07:05:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:05:00,882 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-03-20 07:05:00,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 07:05:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-03-20 07:05:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 07:05:00,884 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:05:00,884 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:05:00,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 07:05:01,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 07:05:01,090 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:05:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:05:01,091 INFO L85 PathProgramCache]: Analyzing trace with hash 395442112, now seen corresponding path program 8 times [2022-03-20 07:05:01,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:05:01,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885082666] [2022-03-20 07:05:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:05:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:05:01,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:05:01,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269951586] [2022-03-20 07:05:01,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 07:05:01,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:05:01,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:05:01,101 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:05:01,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 07:05:01,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 07:05:01,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:05:01,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 07:05:01,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:05:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 07:05:02,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:05:02,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:05:02,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885082666] [2022-03-20 07:05:02,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:05:02,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269951586] [2022-03-20 07:05:02,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269951586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:05:02,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:05:02,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 07:05:02,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847332628] [2022-03-20 07:05:02,175 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:05:02,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 07:05:02,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:05:02,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 07:05:02,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 07:05:02,177 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 07:05:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:05:02,375 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-03-20 07:05:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 07:05:02,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2022-03-20 07:05:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:05:02,377 INFO L225 Difference]: With dead ends: 58 [2022-03-20 07:05:02,377 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 07:05:02,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-20 07:05:02,378 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 07:05:02,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 465 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 07:05:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 07:05:02,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 07:05:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 07:05:02,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-03-20 07:05:02,384 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-03-20 07:05:02,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:05:02,384 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-03-20 07:05:02,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 07:05:02,385 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-03-20 07:05:02,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 07:05:02,386 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:05:02,386 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:05:02,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 07:05:02,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 07:05:02,592 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:05:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:05:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash 667883026, now seen corresponding path program 9 times [2022-03-20 07:05:02,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:05:02,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792503874] [2022-03-20 07:05:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:05:02,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:05:02,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:05:02,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820020984] [2022-03-20 07:05:02,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 07:05:02,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:05:02,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:05:02,604 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:05:02,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 07:05:02,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-20 07:05:02,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:05:02,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 07:05:02,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:05:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 07:05:03,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:05:03,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:05:03,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792503874] [2022-03-20 07:05:03,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:05:03,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820020984] [2022-03-20 07:05:03,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820020984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:05:03,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:05:03,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 07:05:03,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205937481] [2022-03-20 07:05:03,746 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:05:03,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 07:05:03,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:05:03,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 07:05:03,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-20 07:05:03,747 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 07:05:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:05:03,961 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-03-20 07:05:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 07:05:03,961 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2022-03-20 07:05:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:05:03,962 INFO L225 Difference]: With dead ends: 61 [2022-03-20 07:05:03,962 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 07:05:03,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-20 07:05:03,963 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 07:05:03,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 529 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 07:05:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 07:05:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-20 07:05:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 07:05:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-03-20 07:05:03,967 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-03-20 07:05:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:05:03,968 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-03-20 07:05:03,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 07:05:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-03-20 07:05:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 07:05:03,969 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:05:03,969 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:05:03,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 07:05:04,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 07:05:04,176 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:05:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:05:04,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1918146432, now seen corresponding path program 10 times [2022-03-20 07:05:04,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:05:04,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673939993] [2022-03-20 07:05:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:05:04,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:05:04,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:05:04,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215786788] [2022-03-20 07:05:04,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 07:05:04,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:05:04,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:05:04,189 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:05:04,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 07:05:04,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 07:05:04,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:05:04,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 07:05:04,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:05:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 07:05:05,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:05:05,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:05:05,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673939993] [2022-03-20 07:05:05,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:05:05,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215786788] [2022-03-20 07:05:05,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215786788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:05:05,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:05:05,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 07:05:05,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473039037] [2022-03-20 07:05:05,211 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:05:05,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 07:05:05,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:05:05,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 07:05:05,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-20 07:05:05,213 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 07:05:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:05:05,454 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2022-03-20 07:05:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 07:05:05,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2022-03-20 07:05:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:05:05,455 INFO L225 Difference]: With dead ends: 64 [2022-03-20 07:05:05,455 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 07:05:05,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 07:05:05,456 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 07:05:05,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 597 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 07:05:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 07:05:05,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-20 07:05:05,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 07:05:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-03-20 07:05:05,472 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-03-20 07:05:05,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:05:05,472 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-03-20 07:05:05,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 07:05:05,472 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-03-20 07:05:05,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 07:05:05,473 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:05:05,473 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:05:05,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 07:05:05,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 07:05:05,675 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:05:05,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:05:05,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1384988242, now seen corresponding path program 11 times [2022-03-20 07:05:05,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:05:05,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890599708] [2022-03-20 07:05:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:05:05,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:05:05,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:05:05,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428126343] [2022-03-20 07:05:05,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 07:05:05,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:05:05,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:05:05,685 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:05:05,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 07:05:06,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-20 07:05:06,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:05:06,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 07:05:06,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:05:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 07:05:06,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:05:07,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:05:07,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890599708] [2022-03-20 07:05:07,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:05:07,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428126343] [2022-03-20 07:05:07,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428126343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:05:07,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:05:07,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 07:05:07,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574356755] [2022-03-20 07:05:07,583 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:05:07,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 07:05:07,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:05:07,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 07:05:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-03-20 07:05:07,585 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 07:05:07,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:05:07,888 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-03-20 07:05:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 07:05:07,888 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2022-03-20 07:05:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:05:07,889 INFO L225 Difference]: With dead ends: 67 [2022-03-20 07:05:07,889 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 07:05:07,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2022-03-20 07:05:07,890 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 07:05:07,890 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 669 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 07:05:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 07:05:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-20 07:05:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 07:05:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-20 07:05:07,897 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 100 [2022-03-20 07:05:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:05:07,898 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-20 07:05:07,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 07:05:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-20 07:05:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 07:05:07,899 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:05:07,899 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:05:07,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 07:05:08,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 07:05:08,100 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:05:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:05:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2099554112, now seen corresponding path program 12 times [2022-03-20 07:05:08,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:05:08,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183828131] [2022-03-20 07:05:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:05:08,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:05:08,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:05:08,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205059065] [2022-03-20 07:05:08,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 07:05:08,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:05:08,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:05:08,112 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:05:08,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 07:05:08,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 07:05:08,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:05:08,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 07:05:08,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:05:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 90 proven. 236 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-20 07:05:08,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:06:33,061 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4 c_main_~y~0))) (or (not (= (mod (+ (* .cse0 .cse0 .cse0 6) (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 .cse0)) 4) 0)) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 9 (* .cse0 .cse0))) (<= c_main_~k~0 (+ c_main_~c~0 4)) (< (+ 5 c_main_~c~0) c_main_~k~0))) is different from false [2022-03-20 07:06:41,116 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 5 c_main_~y~0))) (or (< (+ 6 c_main_~c~0) c_main_~k~0) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 11)) (not (= (mod (+ (* .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 13) (* 6 .cse0 .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ 5 c_main_~c~0)))) is different from false [2022-03-20 07:06:49,174 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 6 c_main_~y~0))) (+ (* .cse0 .cse0 .cse0 6) (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 .cse0))) 4) 0)) (forall ((main_~k~0 Int)) (or (<= main_~k~0 (+ 6 c_main_~c~0)) (< (+ 7 c_main_~c~0) main_~k~0) (= (+ (* 7 main_~k~0) (* main_~k~0 c_main_~y~0)) (+ (* 14 c_main_~y~0) 49 (* c_main_~y~0 c_main_~y~0)))))) is different from false [2022-03-20 07:06:51,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:06:51,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183828131] [2022-03-20 07:06:51,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:06:51,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205059065] [2022-03-20 07:06:51,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205059065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:06:51,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:06:51,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 07:06:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877865035] [2022-03-20 07:06:51,195 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:06:51,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 07:06:51,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:06:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 07:06:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=783, Unknown=7, NotChecked=180, Total=1122 [2022-03-20 07:06:51,196 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 07:06:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:06:51,654 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-03-20 07:06:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 07:06:51,655 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2022-03-20 07:06:51,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:06:51,656 INFO L225 Difference]: With dead ends: 70 [2022-03-20 07:06:51,656 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 07:06:51,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 62.0s TimeCoverageRelationStatistics Valid=173, Invalid=954, Unknown=7, NotChecked=198, Total=1332 [2022-03-20 07:06:51,657 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 07:06:51,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 748 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 07:06:51,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 07:06:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 07:06:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 07:06:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-20 07:06:51,661 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 107 [2022-03-20 07:06:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:06:51,661 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-20 07:06:51,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 07:06:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-20 07:06:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 07:06:51,662 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:06:51,663 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:06:51,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 07:06:51,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:06:51,869 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:06:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:06:51,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1740638574, now seen corresponding path program 13 times [2022-03-20 07:06:51,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:06:51,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285816958] [2022-03-20 07:06:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:06:51,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:06:51,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:06:51,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686757541] [2022-03-20 07:06:51,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 07:06:51,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:06:51,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:06:51,885 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:06:51,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 07:06:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:06:52,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 07:06:52,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:06:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 98 proven. 275 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-20 07:06:53,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:06:57,492 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* (- 13) c_main_~y~0 c_main_~y~0)) (.cse3 (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (<= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))) (div (+ .cse1 .cse2 .cse3 (- 4)) (- 4)))) (not (= (mod (+ .cse1 .cse2 .cse3) 4) 0)))) is different from false [2022-03-20 07:07:01,542 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 13) c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-03-20 07:07:01,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:01,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285816958] [2022-03-20 07:07:01,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:01,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686757541] [2022-03-20 07:07:01,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686757541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:01,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:01,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 07:07:01,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893589790] [2022-03-20 07:07:01,544 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:01,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 07:07:01,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:01,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 07:07:01,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=634, Unknown=2, NotChecked=102, Total=812 [2022-03-20 07:07:01,545 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 07:07:01,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:01,985 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-03-20 07:07:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 07:07:01,985 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 114 [2022-03-20 07:07:01,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:01,986 INFO L225 Difference]: With dead ends: 73 [2022-03-20 07:07:01,986 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 07:07:01,987 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=95, Invalid=781, Unknown=2, NotChecked=114, Total=992 [2022-03-20 07:07:01,987 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:01,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 826 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 07:07:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 07:07:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-20 07:07:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 07:07:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-03-20 07:07:01,991 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 114 [2022-03-20 07:07:01,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:01,991 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-03-20 07:07:01,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 07:07:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-03-20 07:07:01,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 07:07:01,992 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:01,993 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:02,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 07:07:02,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 07:07:02,199 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:02,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:02,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1682036992, now seen corresponding path program 14 times [2022-03-20 07:07:02,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:02,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248341612] [2022-03-20 07:07:02,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:02,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:02,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567287271] [2022-03-20 07:07:02,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 07:07:02,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:02,211 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:02,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 07:07:02,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 07:07:02,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:07:02,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 07:07:02,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:07:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-20 07:07:03,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:07:03,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:03,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248341612] [2022-03-20 07:07:03,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:03,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567287271] [2022-03-20 07:07:03,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567287271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:03,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:03,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 07:07:03,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892815614] [2022-03-20 07:07:03,367 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:03,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 07:07:03,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 07:07:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-20 07:07:03,368 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 07:07:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:03,741 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2022-03-20 07:07:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 07:07:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 121 [2022-03-20 07:07:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:03,743 INFO L225 Difference]: With dead ends: 76 [2022-03-20 07:07:03,743 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 07:07:03,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-20 07:07:03,743 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:03,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 909 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 07:07:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 07:07:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 07:07:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 20 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 07:07:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-03-20 07:07:03,747 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 121 [2022-03-20 07:07:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:03,747 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-03-20 07:07:03,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 07:07:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-03-20 07:07:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 07:07:03,749 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:03,749 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:03,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 07:07:03,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 07:07:03,955 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:03,956 INFO L85 PathProgramCache]: Analyzing trace with hash 699088594, now seen corresponding path program 15 times [2022-03-20 07:07:03,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:03,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443846997] [2022-03-20 07:07:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:03,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:03,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:03,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440428682] [2022-03-20 07:07:03,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 07:07:03,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:03,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:03,968 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:03,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 07:07:04,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-20 07:07:04,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:07:04,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 07:07:04,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:07:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 07:07:05,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:07:06,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:06,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443846997] [2022-03-20 07:07:06,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440428682] [2022-03-20 07:07:06,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440428682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:06,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:06,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 07:07:06,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75565753] [2022-03-20 07:07:06,163 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:06,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 07:07:06,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:06,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 07:07:06,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1101, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 07:07:06,165 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 07:07:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:06,566 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-03-20 07:07:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 07:07:06,566 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 128 [2022-03-20 07:07:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:06,567 INFO L225 Difference]: With dead ends: 79 [2022-03-20 07:07:06,567 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 07:07:06,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=315, Invalid=1245, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 07:07:06,568 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:06,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 997 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 07:07:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 07:07:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-20 07:07:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 07:07:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-03-20 07:07:06,571 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 128 [2022-03-20 07:07:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:06,572 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-03-20 07:07:06,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 07:07:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-03-20 07:07:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 07:07:06,573 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:06,573 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:06,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 07:07:06,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 07:07:06,776 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash -119728448, now seen corresponding path program 16 times [2022-03-20 07:07:06,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:06,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186739960] [2022-03-20 07:07:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:06,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:06,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825279189] [2022-03-20 07:07:06,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 07:07:06,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:06,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:06,785 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:06,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 07:07:07,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 07:07:07,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:07:07,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 07:07:07,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:07:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 122 proven. 410 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-03-20 07:07:07,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:07:11,906 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse1 (* 13 c_main_~y~0 c_main_~y~0)) (.cse2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (not (<= (div (+ .cse0 .cse1 4 .cse2) 4) (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))))) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse3 (+ c_main_~y~0 1))) (= (* .cse3 .cse3) (* main_~k~0 .cse3))))) (not (= 0 (mod (+ .cse0 .cse1 .cse2) 4))))) is different from false [2022-03-20 07:07:15,968 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4)))) is different from false [2022-03-20 07:07:15,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:15,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186739960] [2022-03-20 07:07:15,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:15,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825279189] [2022-03-20 07:07:15,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825279189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:15,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:15,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-20 07:07:15,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144396317] [2022-03-20 07:07:15,970 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:15,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 07:07:15,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:15,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 07:07:15,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=796, Unknown=2, NotChecked=114, Total=992 [2022-03-20 07:07:15,972 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 07:07:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:16,543 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-03-20 07:07:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 07:07:16,543 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 135 [2022-03-20 07:07:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:16,544 INFO L225 Difference]: With dead ends: 82 [2022-03-20 07:07:16,544 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 07:07:16,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=101, Invalid=961, Unknown=2, NotChecked=126, Total=1190 [2022-03-20 07:07:16,545 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:16,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1037 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 07:07:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 07:07:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-20 07:07:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 22 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 07:07:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-03-20 07:07:16,549 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 135 [2022-03-20 07:07:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:16,549 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-03-20 07:07:16,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 07:07:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-03-20 07:07:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-20 07:07:16,550 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:16,550 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:16,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 07:07:16,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:16,755 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:16,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1869408494, now seen corresponding path program 17 times [2022-03-20 07:07:16,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:16,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834733545] [2022-03-20 07:07:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:16,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:16,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:16,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584048214] [2022-03-20 07:07:16,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 07:07:16,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:16,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:16,764 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:16,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 07:07:17,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-20 07:07:17,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:07:17,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 07:07:17,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:07:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 07:07:18,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:07:18,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:18,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834733545] [2022-03-20 07:07:18,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:18,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584048214] [2022-03-20 07:07:18,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584048214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:18,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:18,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 07:07:18,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242848209] [2022-03-20 07:07:18,591 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:18,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 07:07:18,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 07:07:18,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-20 07:07:18,592 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 07:07:19,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:19,107 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-03-20 07:07:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 07:07:19,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 142 [2022-03-20 07:07:19,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:19,109 INFO L225 Difference]: With dead ends: 85 [2022-03-20 07:07:19,109 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 07:07:19,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-20 07:07:19,110 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:19,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1185 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 07:07:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 07:07:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-20 07:07:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 07:07:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-03-20 07:07:19,114 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 142 [2022-03-20 07:07:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:19,114 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-03-20 07:07:19,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 07:07:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-03-20 07:07:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 07:07:19,115 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:19,115 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:19,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 07:07:19,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:19,316 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:19,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:19,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1178433152, now seen corresponding path program 18 times [2022-03-20 07:07:19,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:19,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618628352] [2022-03-20 07:07:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:19,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:19,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:19,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535702460] [2022-03-20 07:07:19,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 07:07:19,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:19,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:19,326 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:19,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 07:07:22,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 07:07:22,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:07:22,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 07:07:22,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:07:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-20 07:07:22,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:07:23,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:23,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618628352] [2022-03-20 07:07:23,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:23,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535702460] [2022-03-20 07:07:23,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535702460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:23,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:23,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-20 07:07:23,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725346654] [2022-03-20 07:07:23,866 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:23,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 07:07:23,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:23,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 07:07:23,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1056, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 07:07:23,868 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 07:07:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:24,393 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-03-20 07:07:24,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 07:07:24,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 149 [2022-03-20 07:07:24,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:24,394 INFO L225 Difference]: With dead ends: 88 [2022-03-20 07:07:24,394 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 07:07:24,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 07:07:24,395 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:24,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1285 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 07:07:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 07:07:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-20 07:07:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 07:07:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-03-20 07:07:24,399 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 149 [2022-03-20 07:07:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:24,399 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-03-20 07:07:24,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 07:07:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-03-20 07:07:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-20 07:07:24,400 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:24,400 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:24,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 07:07:24,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 07:07:24,608 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash -272924846, now seen corresponding path program 19 times [2022-03-20 07:07:24,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:24,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830170759] [2022-03-20 07:07:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:24,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:24,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:24,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404103543] [2022-03-20 07:07:24,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 07:07:24,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:24,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:24,617 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:24,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 07:07:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:07:25,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 07:07:25,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:07:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-20 07:07:25,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:07:25,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:25,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830170759] [2022-03-20 07:07:25,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:25,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404103543] [2022-03-20 07:07:25,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404103543] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:25,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:25,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-20 07:07:25,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246193192] [2022-03-20 07:07:25,988 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:25,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 07:07:25,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:25,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 07:07:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-20 07:07:25,989 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 07:07:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:26,584 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-03-20 07:07:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 07:07:26,586 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 156 [2022-03-20 07:07:26,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:26,586 INFO L225 Difference]: With dead ends: 91 [2022-03-20 07:07:26,586 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 07:07:26,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-20 07:07:26,587 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:26,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1389 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 07:07:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 07:07:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 07:07:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 25 states have call successors, (25), 6 states have call predecessors, (25), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 07:07:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-03-20 07:07:26,591 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 156 [2022-03-20 07:07:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:26,591 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-03-20 07:07:26,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 07:07:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-03-20 07:07:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 07:07:26,592 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:26,592 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:26,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 07:07:26,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 07:07:26,799 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:26,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2090550848, now seen corresponding path program 20 times [2022-03-20 07:07:26,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:26,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192970363] [2022-03-20 07:07:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:26,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:26,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:26,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857487672] [2022-03-20 07:07:26,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 07:07:26,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:26,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:26,818 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:26,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 07:07:27,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 07:07:27,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:07:27,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 07:07:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:07:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-20 07:07:27,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:07:28,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192970363] [2022-03-20 07:07:28,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857487672] [2022-03-20 07:07:28,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857487672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:28,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:28,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-20 07:07:28,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228581635] [2022-03-20 07:07:28,200 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:28,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 07:07:28,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 07:07:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-20 07:07:28,202 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 07:07:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:28,826 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2022-03-20 07:07:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 07:07:28,827 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 163 [2022-03-20 07:07:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:28,827 INFO L225 Difference]: With dead ends: 94 [2022-03-20 07:07:28,827 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 07:07:28,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-03-20 07:07:28,828 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:28,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1497 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 07:07:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 07:07:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-20 07:07:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 26 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 07:07:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-03-20 07:07:28,832 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 163 [2022-03-20 07:07:28,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:28,832 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-03-20 07:07:28,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 07:07:28,833 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-03-20 07:07:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-20 07:07:28,834 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:28,834 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:28,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 07:07:29,042 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:29,042 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:29,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:29,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1122531218, now seen corresponding path program 21 times [2022-03-20 07:07:29,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:29,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593046079] [2022-03-20 07:07:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:29,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:29,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:29,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111761244] [2022-03-20 07:07:29,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 07:07:29,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:29,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:29,053 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:29,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 07:07:29,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-20 07:07:29,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:07:29,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 07:07:29,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:07:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-20 07:07:30,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:07:30,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:30,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593046079] [2022-03-20 07:07:30,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:30,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111761244] [2022-03-20 07:07:30,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111761244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:30,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:30,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-20 07:07:30,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186468373] [2022-03-20 07:07:30,694 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:30,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 07:07:30,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:30,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 07:07:30,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-20 07:07:30,695 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 07:07:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:31,389 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-03-20 07:07:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 07:07:31,390 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 170 [2022-03-20 07:07:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:31,391 INFO L225 Difference]: With dead ends: 97 [2022-03-20 07:07:31,391 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 07:07:31,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-20 07:07:31,392 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 2 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:31,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1609 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 07:07:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 07:07:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-20 07:07:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 27 states have call successors, (27), 6 states have call predecessors, (27), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 07:07:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-03-20 07:07:31,395 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 170 [2022-03-20 07:07:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:31,396 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-03-20 07:07:31,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 07:07:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-03-20 07:07:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 07:07:31,397 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:31,397 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:31,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 07:07:31,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:31,598 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:31,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:31,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1682799104, now seen corresponding path program 22 times [2022-03-20 07:07:31,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:31,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531115494] [2022-03-20 07:07:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:31,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:31,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:31,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806501086] [2022-03-20 07:07:31,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 07:07:31,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:31,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:31,610 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:31,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 07:07:32,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 07:07:32,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:07:32,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 07:07:32,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:07:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-20 07:07:32,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:07:33,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:33,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531115494] [2022-03-20 07:07:33,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:33,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806501086] [2022-03-20 07:07:33,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806501086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:33,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:33,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-20 07:07:33,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228906912] [2022-03-20 07:07:33,126 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:33,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 07:07:33,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:33,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 07:07:33,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-03-20 07:07:33,128 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 07:07:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:33,816 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2022-03-20 07:07:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 07:07:33,817 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 177 [2022-03-20 07:07:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:33,818 INFO L225 Difference]: With dead ends: 100 [2022-03-20 07:07:33,818 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 07:07:33,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 07:07:33,819 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:33,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1725 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 07:07:33,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 07:07:33,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-20 07:07:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 28 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 07:07:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2022-03-20 07:07:33,823 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 177 [2022-03-20 07:07:33,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:33,823 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2022-03-20 07:07:33,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 07:07:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2022-03-20 07:07:33,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-20 07:07:33,824 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:33,825 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:33,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 07:07:34,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 07:07:34,033 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:34,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:34,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1629618222, now seen corresponding path program 23 times [2022-03-20 07:07:34,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:34,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325251800] [2022-03-20 07:07:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:34,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:34,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:34,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587056823] [2022-03-20 07:07:34,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 07:07:34,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:34,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:34,043 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:34,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 07:07:54,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-20 07:07:54,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:07:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 07:07:54,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:07:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-20 07:07:55,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:07:55,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:55,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325251800] [2022-03-20 07:07:55,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:55,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587056823] [2022-03-20 07:07:55,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587056823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:55,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:55,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-03-20 07:07:55,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960516296] [2022-03-20 07:07:55,848 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:55,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 07:07:55,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:55,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 07:07:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-03-20 07:07:55,849 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 07:07:56,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:56,653 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-03-20 07:07:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 07:07:56,653 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) Word has length 184 [2022-03-20 07:07:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:56,654 INFO L225 Difference]: With dead ends: 103 [2022-03-20 07:07:56,654 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 07:07:56,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 07:07:56,655 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:56,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1845 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 07:07:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 07:07:56,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-20 07:07:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 29 states have call successors, (29), 6 states have call predecessors, (29), 4 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 07:07:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2022-03-20 07:07:56,659 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 184 [2022-03-20 07:07:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:56,659 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2022-03-20 07:07:56,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 07:07:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2022-03-20 07:07:56,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 07:07:56,661 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:56,661 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:56,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 07:07:56,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 07:07:56,875 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1782527424, now seen corresponding path program 24 times [2022-03-20 07:07:56,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:56,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798422905] [2022-03-20 07:07:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:56,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:56,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956646882] [2022-03-20 07:07:56,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 07:07:56,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:56,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:56,888 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:56,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 07:07:57,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 07:07:57,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:07:57,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 07:07:57,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:07:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-03-20 07:07:58,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:07:58,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:07:58,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798422905] [2022-03-20 07:07:58,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:07:58,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956646882] [2022-03-20 07:07:58,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956646882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:07:58,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:07:58,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-03-20 07:07:58,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541385329] [2022-03-20 07:07:58,659 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:07:58,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 07:07:58,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:07:58,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 07:07:58,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 07:07:58,660 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 07:07:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:07:59,443 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2022-03-20 07:07:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 07:07:59,443 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 191 [2022-03-20 07:07:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:07:59,444 INFO L225 Difference]: With dead ends: 106 [2022-03-20 07:07:59,444 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 07:07:59,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 07:07:59,445 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 07:07:59,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1969 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 07:07:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 07:07:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 07:07:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 30 states have call successors, (30), 6 states have call predecessors, (30), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 07:07:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-03-20 07:07:59,449 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 191 [2022-03-20 07:07:59,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:07:59,449 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-03-20 07:07:59,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 07:07:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-03-20 07:07:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-20 07:07:59,450 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:07:59,451 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:07:59,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 07:07:59,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 07:07:59,651 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:07:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:07:59,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1902123026, now seen corresponding path program 25 times [2022-03-20 07:07:59,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:07:59,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281773002] [2022-03-20 07:07:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:07:59,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:07:59,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:07:59,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103221660] [2022-03-20 07:07:59,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 07:07:59,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:07:59,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:07:59,664 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:07:59,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 07:08:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:08:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-20 07:08:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:08:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-20 07:08:01,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:08:01,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:08:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281773002] [2022-03-20 07:08:01,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:08:01,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103221660] [2022-03-20 07:08:01,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103221660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:08:01,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:08:01,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-03-20 07:08:01,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955897817] [2022-03-20 07:08:01,510 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:08:01,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 07:08:01,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:08:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 07:08:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 07:08:01,512 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 07:08:02,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:08:02,340 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-03-20 07:08:02,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 07:08:02,340 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) Word has length 198 [2022-03-20 07:08:02,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:08:02,341 INFO L225 Difference]: With dead ends: 109 [2022-03-20 07:08:02,341 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 07:08:02,341 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 07:08:02,342 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 07:08:02,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2097 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 07:08:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 07:08:02,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-03-20 07:08:02,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 31 states have call successors, (31), 6 states have call predecessors, (31), 4 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 07:08:02,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-03-20 07:08:02,346 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 198 [2022-03-20 07:08:02,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:08:02,346 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-03-20 07:08:02,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 07:08:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-03-20 07:08:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 07:08:02,347 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:08:02,348 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:08:02,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 07:08:02,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 07:08:02,555 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:08:02,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:08:02,555 INFO L85 PathProgramCache]: Analyzing trace with hash 905794944, now seen corresponding path program 26 times [2022-03-20 07:08:02,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:08:02,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480950770] [2022-03-20 07:08:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:08:02,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:08:02,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:08:02,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630050740] [2022-03-20 07:08:02,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 07:08:02,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:08:02,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:08:02,565 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:08:02,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 07:08:03,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 07:08:03,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:08:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-20 07:08:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:08:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-20 07:08:04,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:08:04,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:08:04,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480950770] [2022-03-20 07:08:04,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:08:04,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630050740] [2022-03-20 07:08:04,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630050740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:08:04,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:08:04,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-03-20 07:08:04,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382478061] [2022-03-20 07:08:04,249 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:08:04,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 07:08:04,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:08:04,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 07:08:04,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 07:08:04,253 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 07:08:05,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:08:05,129 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2022-03-20 07:08:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 07:08:05,130 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) Word has length 205 [2022-03-20 07:08:05,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:08:05,131 INFO L225 Difference]: With dead ends: 112 [2022-03-20 07:08:05,131 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 07:08:05,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 07:08:05,132 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 2 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 07:08:05,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2229 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 07:08:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 07:08:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-20 07:08:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 32 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 07:08:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-03-20 07:08:05,136 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 205 [2022-03-20 07:08:05,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:08:05,136 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-03-20 07:08:05,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 07:08:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-03-20 07:08:05,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-20 07:08:05,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:08:05,138 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:08:05,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 07:08:05,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 07:08:05,345 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:08:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:08:05,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1053638574, now seen corresponding path program 27 times [2022-03-20 07:08:05,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:08:05,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777926993] [2022-03-20 07:08:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:08:05,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:08:05,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:08:05,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219046062] [2022-03-20 07:08:05,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 07:08:05,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:08:05,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:08:05,359 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:08:05,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 07:08:09,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-20 07:08:09,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:08:09,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 128 conjunts are in the unsatisfiable core [2022-03-20 07:08:09,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:08:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 210 proven. 1136 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2022-03-20 07:08:10,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:08:30,440 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~y~0 1))) (or (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 3 (* .cse0 .cse0))) (< (+ 2 c_main_~c~0) c_main_~k~0) (not (= (mod (+ (* (- 13) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ c_main_~c~0 1)))) is different from false [2022-03-20 07:10:10,579 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 5 c_main_~y~0))) (or (< (+ 6 c_main_~c~0) c_main_~k~0) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 11)) (not (= (mod (+ (* .cse0 .cse0 .cse0 (- 6)) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ 5 c_main_~c~0)))) is different from false [2022-03-20 07:10:18,632 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 6 c_main_~y~0))) (or (= (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 13) (+ c_main_~k~0 (* .cse0 c_main_~k~0))) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 13) .cse0 .cse0)) 4) 0)) (< (+ 7 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ 6 c_main_~c~0)))) is different from false [2022-03-20 07:10:26,683 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 7 c_main_~y~0))) (or (< (+ c_main_~c~0 8) c_main_~k~0) (not (= (mod (+ (* (- 13) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6))) 4) 0)) (<= c_main_~k~0 (+ 7 c_main_~c~0)) (= (+ (* 2 c_main_~y~0) 15 (* .cse0 .cse0)) (+ c_main_~k~0 (* .cse0 c_main_~k~0))))) is different from false [2022-03-20 07:10:36,641 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 8 c_main_~y~0))) (or (not (= (mod (+ (* (- 13) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 1) .cse0 .cse0 .cse0 .cse0)) 4) 0)) (< (+ 9 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ c_main_~c~0 8)) (= (+ (* 2 c_main_~y~0) 17 (* .cse0 .cse0)) (+ (* .cse0 c_main_~k~0) c_main_~k~0)))) is different from false [2022-03-20 07:10:53,347 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 9 c_main_~y~0))) (or (= (+ (* .cse0 .cse0) 19 (* 2 c_main_~y~0)) (+ (* .cse0 c_main_~k~0) c_main_~k~0)) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 13) .cse0 .cse0)) 4) 0)) (< (+ c_main_~c~0 10) c_main_~k~0) (<= c_main_~k~0 (+ 9 c_main_~c~0)))) is different from false [2022-03-20 07:11:10,360 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 11 c_main_~y~0))) (or (<= c_main_~k~0 (+ c_main_~c~0 11)) (not (= (mod (+ (* (- 13) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0)) 4) 0)) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ 23 (* 2 c_main_~y~0) (* .cse0 .cse0))) (< (+ c_main_~c~0 12) c_main_~k~0))) is different from false [2022-03-20 07:12:20,979 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 13 c_main_~y~0))) (or (not (= (mod (+ (* (- 13) .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ c_main_~c~0 13)) (< (+ 14 c_main_~c~0) c_main_~k~0) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 27)))) is different from false [2022-03-20 07:12:38,917 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 15 c_main_~y~0))) (or (<= c_main_~k~0 (+ c_main_~c~0 15)) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6)) (* (- 13) .cse0 .cse0)) 4) 0)) (< (+ 16 c_main_~c~0) c_main_~k~0) (= (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 31) (+ (* .cse0 c_main_~k~0) c_main_~k~0)))) is different from false [2022-03-20 07:14:41,341 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 19 c_main_~y~0))) (or (<= c_main_~k~0 (+ 19 c_main_~c~0)) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 39)) (not (= 0 (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 (- 13)) (* .cse0 .cse0 .cse0 (- 6))) 4))) (< (+ c_main_~c~0 20) c_main_~k~0))) is different from false [2022-03-20 07:14:49,394 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 20 c_main_~y~0))) (or (< (+ 21 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ c_main_~c~0 20)) (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* .cse0 .cse0) 41 (* 2 c_main_~y~0))) (not (= 0 (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 6))) 4))))) is different from false [2022-03-20 07:14:57,448 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 21 c_main_~y~0))) (or (< (+ 22 c_main_~c~0) c_main_~k~0) (<= c_main_~k~0 (+ 21 c_main_~c~0)) (not (= (mod (+ (* (- 6) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0)) 4) 0)) (= (+ (* 2 c_main_~y~0) (* .cse0 .cse0) 43) (+ (* c_main_~k~0 .cse0) c_main_~k~0)))) is different from false [2022-03-20 07:16:47,543 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 25 c_main_~y~0))) (or (= (+ (* .cse0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) 51 (* .cse0 .cse0))) (not (= (mod (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0) (* (- 13) .cse0 .cse0)) 4) 0)) (<= c_main_~k~0 (+ c_main_~c~0 25)) (< (+ c_main_~c~0 26) c_main_~k~0))) is different from false [2022-03-20 07:16:55,600 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 26 c_main_~y~0))) (+ (* (- 13) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 6) .cse0 .cse0 .cse0))) 4) 0)) (forall ((main_~k~0 Int)) (or (= (+ (* c_main_~y~0 54) 729 (* c_main_~y~0 c_main_~y~0)) (+ (* main_~k~0 27) (* main_~k~0 c_main_~y~0))) (< (+ c_main_~c~0 27) main_~k~0) (<= main_~k~0 (+ c_main_~c~0 26))))) is different from false [2022-03-20 07:16:58,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:16:58,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777926993] [2022-03-20 07:16:58,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:16:58,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219046062] [2022-03-20 07:16:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219046062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:16:58,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:16:58,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-03-20 07:16:58,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553695944] [2022-03-20 07:16:58,285 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:16:58,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 07:16:58,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:16:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 07:16:58,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=2450, Unknown=27, NotChecked=1666, Total=4692 [2022-03-20 07:16:58,287 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 34 states have internal predecessors, (72), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 07:17:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:17:03,501 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-03-20 07:17:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 07:17:03,502 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 34 states have internal predecessors, (72), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) Word has length 212 [2022-03-20 07:17:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:17:03,503 INFO L225 Difference]: With dead ends: 115 [2022-03-20 07:17:03,503 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 07:17:03,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 369.1s TimeCoverageRelationStatistics Valid=570, Invalid=2763, Unknown=29, NotChecked=1750, Total=5112 [2022-03-20 07:17:03,505 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 8 mSDsluCounter, 2197 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 2162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:17:03,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2269 Invalid, 2162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 07:17:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 07:17:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-03-20 07:17:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 33 states have call successors, (33), 6 states have call predecessors, (33), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 07:17:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2022-03-20 07:17:03,509 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 212 [2022-03-20 07:17:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:17:03,509 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2022-03-20 07:17:03,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 34 states have internal predecessors, (72), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 07:17:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2022-03-20 07:17:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-20 07:17:03,511 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:17:03,511 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:17:03,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 07:17:03,721 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:17:03,721 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:17:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:17:03,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1817647808, now seen corresponding path program 28 times [2022-03-20 07:17:03,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:17:03,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351068379] [2022-03-20 07:17:03,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:17:03,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:17:03,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:17:03,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052283624] [2022-03-20 07:17:03,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 07:17:03,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:17:03,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:17:03,730 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:17:03,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 07:17:04,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 07:17:04,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:17:04,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-20 07:17:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:17:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-03-20 07:17:05,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:17:05,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:17:05,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351068379] [2022-03-20 07:17:05,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:17:05,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052283624] [2022-03-20 07:17:05,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052283624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:17:05,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:17:05,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-03-20 07:17:05,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321675743] [2022-03-20 07:17:05,581 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:17:05,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 07:17:05,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:17:05,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 07:17:05,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 07:17:05,582 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 07:17:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:17:06,605 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2022-03-20 07:17:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 07:17:06,605 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 219 [2022-03-20 07:17:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:17:06,606 INFO L225 Difference]: With dead ends: 118 [2022-03-20 07:17:06,606 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 07:17:06,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 07:17:06,607 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 2399 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2505 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:17:06,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2505 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 07:17:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 07:17:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-20 07:17:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 34 states have call successors, (34), 6 states have call predecessors, (34), 4 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 07:17:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2022-03-20 07:17:06,611 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 219 [2022-03-20 07:17:06,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:17:06,612 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2022-03-20 07:17:06,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 07:17:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2022-03-20 07:17:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-03-20 07:17:06,613 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:17:06,613 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:17:06,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 07:17:06,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 07:17:06,822 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:17:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:17:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1847195794, now seen corresponding path program 29 times [2022-03-20 07:17:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:17:06,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052891010] [2022-03-20 07:17:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:17:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:17:06,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:17:06,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676301780] [2022-03-20 07:17:06,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 07:17:06,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:17:06,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:17:06,830 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:17:06,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 07:17:15,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-03-20 07:17:15,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:17:15,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 124 conjunts are in the unsatisfiable core [2022-03-20 07:17:15,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:17:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-03-20 07:17:16,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:17:16,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:17:16,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052891010] [2022-03-20 07:17:16,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:17:16,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676301780] [2022-03-20 07:17:16,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676301780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:17:16,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:17:16,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-03-20 07:17:16,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832100880] [2022-03-20 07:17:16,828 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:17:16,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 07:17:16,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:17:16,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 07:17:16,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 07:17:16,829 INFO L87 Difference]: Start difference. First operand 115 states and 143 transitions. Second operand has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 07:17:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:17:17,921 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2022-03-20 07:17:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 07:17:17,921 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) Word has length 226 [2022-03-20 07:17:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:17:17,922 INFO L225 Difference]: With dead ends: 121 [2022-03-20 07:17:17,922 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 07:17:17,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 07:17:17,923 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 2540 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:17:17,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2649 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 07:17:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 07:17:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-03-20 07:17:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 35 states have call successors, (35), 6 states have call predecessors, (35), 4 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 07:17:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-03-20 07:17:17,927 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 226 [2022-03-20 07:17:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:17:17,927 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-03-20 07:17:17,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 07:17:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-03-20 07:17:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-20 07:17:17,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:17:17,929 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:17:17,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 07:17:18,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:17:18,140 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:17:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:17:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash 519955712, now seen corresponding path program 30 times [2022-03-20 07:17:18,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:17:18,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116109163] [2022-03-20 07:17:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:17:18,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:17:18,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:17:18,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380347518] [2022-03-20 07:17:18,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 07:17:18,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:17:18,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:17:18,154 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:17:18,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 07:17:32,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 07:17:32,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:17:32,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 128 conjunts are in the unsatisfiable core [2022-03-20 07:17:32,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:17:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-20 07:17:33,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:17:34,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:17:34,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116109163] [2022-03-20 07:17:34,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:17:34,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380347518] [2022-03-20 07:17:34,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380347518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:17:34,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:17:34,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-03-20 07:17:34,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425004334] [2022-03-20 07:17:34,134 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:17:34,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 07:17:34,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:17:34,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 07:17:34,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 07:17:34,136 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 07:17:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:17:35,284 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2022-03-20 07:17:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 07:17:35,285 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) Word has length 233 [2022-03-20 07:17:35,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:17:35,286 INFO L225 Difference]: With dead ends: 124 [2022-03-20 07:17:35,286 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 07:17:35,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 07:17:35,286 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 2 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2797 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:17:35,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2797 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 07:17:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 07:17:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-20 07:17:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 36 states have call successors, (36), 6 states have call predecessors, (36), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 07:17:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2022-03-20 07:17:35,290 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 233 [2022-03-20 07:17:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:17:35,291 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2022-03-20 07:17:35,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 07:17:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2022-03-20 07:17:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-03-20 07:17:35,292 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:17:35,292 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:17:35,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 07:17:35,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:17:35,507 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:17:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:17:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1893318866, now seen corresponding path program 31 times [2022-03-20 07:17:35,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:17:35,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058742434] [2022-03-20 07:17:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:17:35,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:17:35,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:17:35,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770589941] [2022-03-20 07:17:35,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 07:17:35,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:17:35,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:17:35,518 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:17:35,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 07:17:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:17:36,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 132 conjunts are in the unsatisfiable core [2022-03-20 07:17:36,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:17:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 64 proven. 1488 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-20 07:17:37,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:17:37,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:17:37,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058742434] [2022-03-20 07:17:37,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:17:37,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770589941] [2022-03-20 07:17:37,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770589941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:17:37,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:17:37,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-03-20 07:17:37,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072588790] [2022-03-20 07:17:37,611 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:17:37,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 07:17:37,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:17:37,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 07:17:37,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 07:17:37,612 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 07:17:38,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:17:38,833 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2022-03-20 07:17:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 07:17:38,833 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) Word has length 240 [2022-03-20 07:17:38,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:17:38,834 INFO L225 Difference]: With dead ends: 127 [2022-03-20 07:17:38,834 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 07:17:38,835 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 07:17:38,835 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 2 mSDsluCounter, 2834 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2949 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 07:17:38,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2949 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 07:17:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 07:17:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-20 07:17:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 37 states have call successors, (37), 6 states have call predecessors, (37), 4 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 07:17:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2022-03-20 07:17:38,839 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 240 [2022-03-20 07:17:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:17:38,839 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2022-03-20 07:17:38,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 07:17:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2022-03-20 07:17:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-03-20 07:17:38,841 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:17:38,841 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:17:38,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 07:17:39,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 07:17:39,050 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:17:39,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:17:39,050 INFO L85 PathProgramCache]: Analyzing trace with hash 985158848, now seen corresponding path program 32 times [2022-03-20 07:17:39,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:17:39,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235069845] [2022-03-20 07:17:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:17:39,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:17:39,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:17:39,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722289828] [2022-03-20 07:17:39,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 07:17:39,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:17:39,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:17:39,059 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:17:39,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 07:17:40,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 07:17:40,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:17:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 137 conjunts are in the unsatisfiable core [2022-03-20 07:17:40,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:17:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-20 07:17:41,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:17:45,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:17:45,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235069845] [2022-03-20 07:17:45,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:17:45,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722289828] [2022-03-20 07:17:45,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722289828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:17:45,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:17:45,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-03-20 07:17:45,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625551471] [2022-03-20 07:17:45,331 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:17:45,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 07:17:45,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:17:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 07:17:45,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1172, Invalid=3940, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 07:17:45,333 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 07:17:46,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:17:46,812 INFO L93 Difference]: Finished difference Result 130 states and 162 transitions. [2022-03-20 07:17:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 07:17:46,813 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) Word has length 247 [2022-03-20 07:17:46,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:17:46,815 INFO L225 Difference]: With dead ends: 130 [2022-03-20 07:17:46,815 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 07:17:46,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 405 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1182, Invalid=4220, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 07:17:46,817 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 2987 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 07:17:46,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3105 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 07:17:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 07:17:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-20 07:17:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 38 states have call successors, (38), 6 states have call predecessors, (38), 4 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 07:17:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 159 transitions. [2022-03-20 07:17:46,821 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 159 transitions. Word has length 247 [2022-03-20 07:17:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:17:46,821 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 159 transitions. [2022-03-20 07:17:46,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 07:17:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 159 transitions. [2022-03-20 07:17:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-03-20 07:17:46,822 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:17:46,823 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:17:46,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 07:17:47,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 07:17:47,033 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:17:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:17:47,034 INFO L85 PathProgramCache]: Analyzing trace with hash 456530194, now seen corresponding path program 33 times [2022-03-20 07:17:47,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:17:47,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122653004] [2022-03-20 07:17:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:17:47,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:17:47,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:17:47,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54894775] [2022-03-20 07:17:47,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 07:17:47,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:17:47,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:17:47,048 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:17:47,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 07:17:56,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-03-20 07:17:56,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:17:56,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 140 conjunts are in the unsatisfiable core [2022-03-20 07:17:56,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:17:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-03-20 07:17:57,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:17:57,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:17:57,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122653004] [2022-03-20 07:17:57,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:17:57,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54894775] [2022-03-20 07:17:57,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54894775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:17:57,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:17:57,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-03-20 07:17:57,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008484204] [2022-03-20 07:17:57,500 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:17:57,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 07:17:57,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:17:57,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 07:17:57,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 07:17:57,501 INFO L87 Difference]: Start difference. First operand 127 states and 159 transitions. Second operand has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 07:17:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:17:58,906 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2022-03-20 07:17:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 07:17:58,906 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) Word has length 254 [2022-03-20 07:17:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:17:58,907 INFO L225 Difference]: With dead ends: 133 [2022-03-20 07:17:58,907 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 07:17:58,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 07:17:58,908 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 2 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3265 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 07:17:58,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3265 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 07:17:58,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 07:17:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-03-20 07:17:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 39 states have call successors, (39), 6 states have call predecessors, (39), 4 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 07:17:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 163 transitions. [2022-03-20 07:17:58,911 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 163 transitions. Word has length 254 [2022-03-20 07:17:58,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:17:58,912 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 163 transitions. [2022-03-20 07:17:58,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 07:17:58,912 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 163 transitions. [2022-03-20 07:17:58,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-03-20 07:17:58,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:17:58,913 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:17:58,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 07:17:59,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 07:17:59,126 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:17:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:17:59,127 INFO L85 PathProgramCache]: Analyzing trace with hash -795593600, now seen corresponding path program 34 times [2022-03-20 07:17:59,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:17:59,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556352569] [2022-03-20 07:17:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:17:59,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:17:59,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:17:59,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335308862] [2022-03-20 07:17:59,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 07:17:59,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:17:59,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:17:59,138 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:17:59,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 07:17:59,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 07:17:59,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:17:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 144 conjunts are in the unsatisfiable core [2022-03-20 07:17:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:18:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-20 07:18:01,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:18:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:18:01,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556352569] [2022-03-20 07:18:01,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:18:01,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335308862] [2022-03-20 07:18:01,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335308862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:18:01,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:18:01,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-03-20 07:18:01,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820588036] [2022-03-20 07:18:01,418 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:18:01,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 07:18:01,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:18:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 07:18:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 07:18:01,420 INFO L87 Difference]: Start difference. First operand 130 states and 163 transitions. Second operand has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 07:18:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:18:02,906 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2022-03-20 07:18:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 07:18:02,906 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) Word has length 261 [2022-03-20 07:18:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:18:02,907 INFO L225 Difference]: With dead ends: 136 [2022-03-20 07:18:02,907 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 07:18:02,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 07:18:02,908 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 3305 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 07:18:02,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3429 Invalid, 2743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2743 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 07:18:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 07:18:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-20 07:18:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 40 states have call successors, (40), 6 states have call predecessors, (40), 4 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 07:18:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2022-03-20 07:18:02,912 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 261 [2022-03-20 07:18:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:18:02,912 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2022-03-20 07:18:02,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 07:18:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2022-03-20 07:18:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-03-20 07:18:02,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:18:02,914 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:18:02,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 07:18:03,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:18:03,115 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:18:03,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:18:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1475543378, now seen corresponding path program 35 times [2022-03-20 07:18:03,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:18:03,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252251038] [2022-03-20 07:18:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:18:03,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:18:03,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:18:03,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563022843] [2022-03-20 07:18:03,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 07:18:03,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:18:03,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:18:03,125 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:18:03,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 07:18:29,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-03-20 07:18:29,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:18:29,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 148 conjunts are in the unsatisfiable core [2022-03-20 07:18:29,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:18:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-03-20 07:18:30,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:18:31,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:18:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252251038] [2022-03-20 07:18:31,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:18:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563022843] [2022-03-20 07:18:31,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563022843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:18:31,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:18:31,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-03-20 07:18:31,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575767966] [2022-03-20 07:18:31,231 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:18:31,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 07:18:31,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:18:31,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 07:18:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 07:18:31,232 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 07:18:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:18:32,748 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2022-03-20 07:18:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 07:18:32,748 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) Word has length 268 [2022-03-20 07:18:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:18:32,749 INFO L225 Difference]: With dead ends: 139 [2022-03-20 07:18:32,749 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 07:18:32,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 07:18:32,750 INFO L913 BasicCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 07:18:32,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3597 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 07:18:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 07:18:32,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-03-20 07:18:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 41 states have call successors, (41), 6 states have call predecessors, (41), 4 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 07:18:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2022-03-20 07:18:32,762 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 268 [2022-03-20 07:18:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:18:32,762 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2022-03-20 07:18:32,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 07:18:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2022-03-20 07:18:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-20 07:18:32,764 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:18:32,764 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:18:32,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 07:18:32,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 07:18:32,975 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:18:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:18:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash 290292800, now seen corresponding path program 36 times [2022-03-20 07:18:32,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:18:32,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870554443] [2022-03-20 07:18:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:18:32,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:18:32,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:18:32,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427499381] [2022-03-20 07:18:32,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 07:18:32,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:18:32,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:18:32,985 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:18:32,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 07:19:17,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-20 07:19:17,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:19:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 152 conjunts are in the unsatisfiable core [2022-03-20 07:19:17,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4736 backedges. 74 proven. 1998 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-20 07:19:18,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:18,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:18,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870554443] [2022-03-20 07:19:18,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:18,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427499381] [2022-03-20 07:19:18,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427499381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:18,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:18,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2022-03-20 07:19:18,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925093256] [2022-03-20 07:19:18,604 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:18,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 07:19:18,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:18,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 07:19:18,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 07:19:18,605 INFO L87 Difference]: Start difference. First operand 136 states and 171 transitions. Second operand has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39)