/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/egcd3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 06:53:54,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 06:53:54,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 06:53:54,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 06:53:54,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 06:53:54,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 06:53:54,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 06:53:54,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 06:53:54,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 06:53:54,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 06:53:54,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 06:53:54,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 06:53:54,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 06:53:54,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 06:53:54,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 06:53:54,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 06:53:54,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 06:53:54,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 06:53:54,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 06:53:54,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 06:53:54,932 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 06:53:54,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 06:53:54,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 06:53:54,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 06:53:54,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 06:53:54,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 06:53:54,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 06:53:54,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 06:53:54,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 06:53:54,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 06:53:54,956 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 06:53:54,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 06:53:54,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 06:53:54,957 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 06:53:54,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 06:53:54,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 06:53:54,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 06:53:54,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 06:53:54,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 06:53:54,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 06:53:54,958 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 06:53:54,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 06:53:54,958 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 06:53:54,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 06:53:54,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 06:53:54,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 06:53:54,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 06:53:54,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 06:53:54,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:53:54,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 06:53:54,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 06:53:54,959 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 06:53:54,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 06:53:55,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 06:53:55,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 06:53:55,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 06:53:55,168 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 06:53:55,169 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 06:53:55,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-04-06 06:53:55,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68d749317/e81115bdea1b408b86c595e9ffedb1a9/FLAGa70a48a79 [2022-04-06 06:53:55,559 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 06:53:55,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-04-06 06:53:55,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68d749317/e81115bdea1b408b86c595e9ffedb1a9/FLAGa70a48a79 [2022-04-06 06:53:55,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68d749317/e81115bdea1b408b86c595e9ffedb1a9 [2022-04-06 06:53:55,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 06:53:55,573 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 06:53:55,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 06:53:55,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 06:53:55,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 06:53:55,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:53:55" (1/1) ... [2022-04-06 06:53:55,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fcd4045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:53:55, skipping insertion in model container [2022-04-06 06:53:55,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:53:55" (1/1) ... [2022-04-06 06:53:55,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 06:53:55,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 06:53:55,725 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/egcd3-ll_unwindbound50.c[490,503] [2022-04-06 06:53:55,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:53:55,746 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 06:53:55,753 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/egcd3-ll_unwindbound50.c[490,503] [2022-04-06 06:53:55,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:53:55,767 INFO L208 MainTranslator]: Completed translation [2022-04-06 06:53:55,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:53:55 WrapperNode [2022-04-06 06:53:55,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 06:53:55,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 06:53:55,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 06:53:55,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 06:53:55,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:53:55" (1/1) ... [2022-04-06 06:53:55,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:53:55" (1/1) ... [2022-04-06 06:53:55,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:53:55" (1/1) ... [2022-04-06 06:53:55,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:53:55" (1/1) ... [2022-04-06 06:53:55,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:53:55" (1/1) ... [2022-04-06 06:53:55,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:53:55" (1/1) ... [2022-04-06 06:53:55,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:53:55" (1/1) ... [2022-04-06 06:53:55,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 06:53:55,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 06:53:55,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 06:53:55,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 06:53:55,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:53:55" (1/1) ... [2022-04-06 06:53:55,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:53:55,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:53:55,808 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) [2022-04-06 06:53:55,867 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 [2022-04-06 06:53:55,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 06:53:55,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 06:53:55,885 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 06:53:55,886 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 06:53:55,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 06:53:55,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 06:53:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 06:53:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 06:53:55,886 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 06:53:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 06:53:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 06:53:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 06:53:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 06:53:55,887 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 06:53:55,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 06:53:55,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 06:53:55,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 06:53:55,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 06:53:55,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 06:53:55,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 06:53:55,947 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 06:53:55,948 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 06:53:56,110 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 06:53:56,115 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 06:53:56,115 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 06:53:56,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:53:56 BoogieIcfgContainer [2022-04-06 06:53:56,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 06:53:56,117 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 06:53:56,117 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 06:53:56,118 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 06:53:56,120 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:53:56" (1/1) ... [2022-04-06 06:53:56,121 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 06:53:56,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:53:56 BasicIcfg [2022-04-06 06:53:56,144 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 06:53:56,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 06:53:56,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 06:53:56,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 06:53:56,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:53:55" (1/4) ... [2022-04-06 06:53:56,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7581d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:53:56, skipping insertion in model container [2022-04-06 06:53:56,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:53:55" (2/4) ... [2022-04-06 06:53:56,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7581d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:53:56, skipping insertion in model container [2022-04-06 06:53:56,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:53:56" (3/4) ... [2022-04-06 06:53:56,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7581d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:53:56, skipping insertion in model container [2022-04-06 06:53:56,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:53:56" (4/4) ... [2022-04-06 06:53:56,153 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.cJordan [2022-04-06 06:53:56,156 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 06:53:56,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 06:53:56,195 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 06:53:56,201 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 [2022-04-06 06:53:56,202 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 06:53:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 06:53:56,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 06:53:56,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:53:56,228 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:53:56,228 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:53:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:53:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-04-06 06:53:56,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:53:56,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038777162] [2022-04-06 06:53:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:56,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:53:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:53:56,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:53:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:53:56,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:53:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:53:56,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 06:53:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:53:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:53:56,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:53:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038777162] [2022-04-06 06:53:56,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038777162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:53:56,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:53:56,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 06:53:56,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61791611] [2022-04-06 06:53:56,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:53:56,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 06:53:56,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:53:56,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 06:53:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:53:56,438 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:53:56,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:53:56,505 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-04-06 06:53:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 06:53:56,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 06:53:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:53:56,521 INFO L225 Difference]: With dead ends: 41 [2022-04-06 06:53:56,521 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 06:53:56,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:53:56,524 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:53:56,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:53:56,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 06:53:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-06 06:53:56,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 06:53:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-04-06 06:53:56,549 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-04-06 06:53:56,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:53:56,549 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-04-06 06:53:56,550 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:53:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-04-06 06:53:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 06:53:56,551 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:53:56,552 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] [2022-04-06 06:53:56,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 06:53:56,552 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:53:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:53:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-04-06 06:53:56,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:53:56,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119664643] [2022-04-06 06:53:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:56,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:53:56,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:53:56,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778557119] [2022-04-06 06:53:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:56,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:53:56,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:53:56,567 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) [2022-04-06 06:53:56,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 06:53:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:53:56,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 06:53:56,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:53:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:53:56,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:53:56,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:53:56,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119664643] [2022-04-06 06:53:56,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:53:56,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778557119] [2022-04-06 06:53:56,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778557119] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:53:56,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:53:56,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 06:53:56,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220865585] [2022-04-06 06:53:56,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:53:56,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 06:53:56,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:53:56,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 06:53:56,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:53:56,685 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:53:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:53:56,694 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-04-06 06:53:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 06:53:56,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 06:53:56,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:53:56,695 INFO L225 Difference]: With dead ends: 37 [2022-04-06 06:53:56,695 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 06:53:56,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:53:56,696 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:53:56,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:53:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 06:53:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 06:53:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 06:53:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-04-06 06:53:56,701 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-04-06 06:53:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:53:56,702 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-04-06 06:53:56,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:53:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-04-06 06:53:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 06:53:56,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:53:56,703 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] [2022-04-06 06:53:56,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 06:53:56,922 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 [2022-04-06 06:53:56,922 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:53:56,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:53:56,922 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-04-06 06:53:56,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:53:56,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015841825] [2022-04-06 06:53:56,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:56,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:53:56,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:53:56,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431249706] [2022-04-06 06:53:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:56,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:53:56,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:53:56,938 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) [2022-04-06 06:53:56,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 06:53:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:53:56,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:53:56,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:53:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 06:53:57,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:53:57,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:53:57,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015841825] [2022-04-06 06:53:57,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:53:57,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431249706] [2022-04-06 06:53:57,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431249706] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:53:57,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:53:57,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 06:53:57,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454025991] [2022-04-06 06:53:57,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:53:57,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 06:53:57,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:53:57,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 06:53:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:53:57,085 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:53:57,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:53:57,138 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2022-04-06 06:53:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 06:53:57,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-04-06 06:53:57,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:53:57,139 INFO L225 Difference]: With dead ends: 50 [2022-04-06 06:53:57,139 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 06:53:57,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 06:53:57,141 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:53:57,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 148 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:53:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 06:53:57,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-04-06 06:53:57,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 06:53:57,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-04-06 06:53:57,146 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-04-06 06:53:57,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:53:57,146 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-04-06 06:53:57,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:53:57,146 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-04-06 06:53:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 06:53:57,147 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:53:57,147 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:53:57,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 06:53:57,363 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 [2022-04-06 06:53:57,363 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:53:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:53:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-04-06 06:53:57,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:53:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590259593] [2022-04-06 06:53:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:57,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:53:57,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:53:57,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422733508] [2022-04-06 06:53:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:57,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:53:57,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:53:57,381 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) [2022-04-06 06:53:57,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 06:53:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:53:57,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:53:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:53:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:53:57,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:53:57,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:53:57,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590259593] [2022-04-06 06:53:57,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:53:57,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422733508] [2022-04-06 06:53:57,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422733508] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:53:57,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:53:57,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:53:57,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143584069] [2022-04-06 06:53:57,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:53:57,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:53:57,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:53:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:53:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:53:57,526 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:53:57,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:53:57,553 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-04-06 06:53:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:53:57,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-04-06 06:53:57,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:53:57,555 INFO L225 Difference]: With dead ends: 40 [2022-04-06 06:53:57,556 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 06:53:57,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:53:57,558 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:53:57,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:53:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 06:53:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 06:53:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 06:53:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-04-06 06:53:57,569 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-04-06 06:53:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:53:57,570 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-04-06 06:53:57,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:53:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-04-06 06:53:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 06:53:57,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:53:57,571 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, 1, 1, 1, 1, 1] [2022-04-06 06:53:57,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 06:53:57,794 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 [2022-04-06 06:53:57,794 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:53:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:53:57,797 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-04-06 06:53:57,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:53:57,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814623378] [2022-04-06 06:53:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:57,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:53:57,811 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:53:57,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132414869] [2022-04-06 06:53:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:57,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:53:57,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:53:57,812 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) [2022-04-06 06:53:57,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 06:53:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:53:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 06:53:57,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:53:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 06:53:58,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:53:58,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:53:58,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814623378] [2022-04-06 06:53:58,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:53:58,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132414869] [2022-04-06 06:53:58,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132414869] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:53:58,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:53:58,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 06:53:58,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402891203] [2022-04-06 06:53:58,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:53:58,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 06:53:58,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:53:58,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 06:53:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:53:58,122 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:53:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:53:58,286 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-04-06 06:53:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 06:53:58,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-04-06 06:53:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:53:58,287 INFO L225 Difference]: With dead ends: 66 [2022-04-06 06:53:58,287 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 06:53:58,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 06:53:58,288 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:53:58,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 248 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:53:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 06:53:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-04-06 06:53:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 06:53:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-04-06 06:53:58,293 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-04-06 06:53:58,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:53:58,293 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-04-06 06:53:58,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:53:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-04-06 06:53:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 06:53:58,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:53:58,294 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:53:58,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 06:53:58,507 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 [2022-04-06 06:53:58,507 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:53:58,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:53:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-04-06 06:53:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:53:58,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784433113] [2022-04-06 06:53:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:58,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:53:58,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:53:58,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90110795] [2022-04-06 06:53:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:58,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:53:58,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:53:58,520 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) [2022-04-06 06:53:58,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 06:53:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:53:58,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:53:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:53:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:53:58,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:53:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:53:58,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:53:58,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784433113] [2022-04-06 06:53:58,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:53:58,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90110795] [2022-04-06 06:53:58,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90110795] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:53:58,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:53:58,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 06:53:58,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024196443] [2022-04-06 06:53:58,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:53:58,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 06:53:58,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:53:58,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 06:53:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:53:58,676 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 06:53:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:53:58,758 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-04-06 06:53:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 06:53:58,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-04-06 06:53:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:53:58,760 INFO L225 Difference]: With dead ends: 144 [2022-04-06 06:53:58,760 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 06:53:58,761 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-04-06 06:53:58,761 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:53:58,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 286 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:53:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 06:53:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2022-04-06 06:53:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 06:53:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-04-06 06:53:58,769 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2022-04-06 06:53:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:53:58,770 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-04-06 06:53:58,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 06:53:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-04-06 06:53:58,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 06:53:58,770 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:53:58,771 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:53:58,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 06:53:58,987 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 [2022-04-06 06:53:58,987 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:53:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:53:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-04-06 06:53:58,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:53:58,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605200515] [2022-04-06 06:53:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:58,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:53:59,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:53:59,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302192772] [2022-04-06 06:53:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:59,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:53:59,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:53:59,002 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) [2022-04-06 06:53:59,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 06:53:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:53:59,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:53:59,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:53:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 06:53:59,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:53:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 06:53:59,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:53:59,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605200515] [2022-04-06 06:53:59,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:53:59,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302192772] [2022-04-06 06:53:59,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302192772] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:53:59,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:53:59,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 06:53:59,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522417593] [2022-04-06 06:53:59,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:53:59,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 06:53:59,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:53:59,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 06:53:59,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 06:53:59,205 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:53:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:53:59,358 INFO L93 Difference]: Finished difference Result 175 states and 251 transitions. [2022-04-06 06:53:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 06:53:59,360 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-06 06:53:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:53:59,361 INFO L225 Difference]: With dead ends: 175 [2022-04-06 06:53:59,361 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 06:53:59,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-06 06:53:59,363 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 115 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:53:59,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 254 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:53:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 06:53:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2022-04-06 06:53:59,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.346938775510204) internal successors, (132), 99 states have internal predecessors, (132), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 06:53:59,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-04-06 06:53:59,385 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2022-04-06 06:53:59,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:53:59,385 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-04-06 06:53:59,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:53:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-04-06 06:53:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 06:53:59,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:53:59,386 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:53:59,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 06:53:59,610 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 [2022-04-06 06:53:59,610 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:53:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:53:59,611 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-04-06 06:53:59,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:53:59,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233228846] [2022-04-06 06:53:59,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:59,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:53:59,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:53:59,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597872005] [2022-04-06 06:53:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:53:59,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:53:59,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:53:59,621 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) [2022-04-06 06:53:59,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 06:53:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:53:59,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 06:53:59,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:53:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 06:53:59,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:53:59,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:53:59,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233228846] [2022-04-06 06:53:59,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:53:59,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597872005] [2022-04-06 06:53:59,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597872005] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:53:59,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:53:59,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 06:53:59,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702723759] [2022-04-06 06:53:59,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:53:59,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 06:53:59,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:53:59,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 06:53:59,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:53:59,873 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 06:54:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:00,031 INFO L93 Difference]: Finished difference Result 155 states and 206 transitions. [2022-04-06 06:54:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 06:54:00,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-04-06 06:54:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:00,033 INFO L225 Difference]: With dead ends: 155 [2022-04-06 06:54:00,033 INFO L226 Difference]: Without dead ends: 155 [2022-04-06 06:54:00,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-04-06 06:54:00,034 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:00,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 228 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:54:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-06 06:54:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-04-06 06:54:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 108 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 06:54:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-04-06 06:54:00,039 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2022-04-06 06:54:00,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:00,039 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-04-06 06:54:00,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 06:54:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-04-06 06:54:00,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 06:54:00,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:00,040 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:00,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:00,247 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 [2022-04-06 06:54:00,248 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:00,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:00,248 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-04-06 06:54:00,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:00,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75347088] [2022-04-06 06:54:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:00,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:00,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:00,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651116910] [2022-04-06 06:54:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:00,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:00,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:00,290 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) [2022-04-06 06:54:00,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 06:54:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:00,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 06:54:00,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 06:54:00,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:54:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:54:00,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:00,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75347088] [2022-04-06 06:54:00,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:00,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651116910] [2022-04-06 06:54:00,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651116910] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:54:00,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:54:00,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-04-06 06:54:00,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047368699] [2022-04-06 06:54:00,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:54:00,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 06:54:00,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 06:54:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 06:54:00,607 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:54:00,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:00,721 INFO L93 Difference]: Finished difference Result 177 states and 239 transitions. [2022-04-06 06:54:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 06:54:00,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-06 06:54:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:00,722 INFO L225 Difference]: With dead ends: 177 [2022-04-06 06:54:00,722 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 06:54:00,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-06 06:54:00,723 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 61 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:00,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 357 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:54:00,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 06:54:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-04-06 06:54:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.34375) internal successors, (172), 129 states have internal predecessors, (172), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 06:54:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-04-06 06:54:00,728 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2022-04-06 06:54:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:00,729 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-04-06 06:54:00,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:54:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-04-06 06:54:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 06:54:00,729 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:00,730 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:00,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:00,943 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 [2022-04-06 06:54:00,944 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:00,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:00,944 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-04-06 06:54:00,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:00,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461373839] [2022-04-06 06:54:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:00,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:00,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:00,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250008676] [2022-04-06 06:54:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:00,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:00,955 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) [2022-04-06 06:54:00,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 06:54:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:00,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:54:00,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:54:01,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:54:01,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461373839] [2022-04-06 06:54:01,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250008676] [2022-04-06 06:54:01,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250008676] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:54:01,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:54:01,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 06:54:01,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373288839] [2022-04-06 06:54:01,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:54:01,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 06:54:01,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:01,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 06:54:01,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:54:01,074 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:54:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:01,089 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2022-04-06 06:54:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 06:54:01,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-04-06 06:54:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:01,091 INFO L225 Difference]: With dead ends: 174 [2022-04-06 06:54:01,091 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 06:54:01,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:54:01,091 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:01,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:54:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 06:54:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-04-06 06:54:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.3359375) internal successors, (171), 129 states have internal predecessors, (171), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 06:54:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-04-06 06:54:01,096 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2022-04-06 06:54:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:01,096 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-04-06 06:54:01,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:54:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-04-06 06:54:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 06:54:01,097 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:01,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:01,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:01,313 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 [2022-04-06 06:54:01,314 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:01,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:01,314 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-04-06 06:54:01,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:01,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397796482] [2022-04-06 06:54:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:01,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:01,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:01,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200602618] [2022-04-06 06:54:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:01,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:01,323 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) [2022-04-06 06:54:01,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 06:54:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:01,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:54:01,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 06:54:01,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:54:01,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:01,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397796482] [2022-04-06 06:54:01,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:01,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200602618] [2022-04-06 06:54:01,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200602618] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:54:01,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:54:01,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:54:01,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537487925] [2022-04-06 06:54:01,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:54:01,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:54:01,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:01,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:54:01,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:54:01,429 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:54:01,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:01,457 INFO L93 Difference]: Finished difference Result 237 states and 331 transitions. [2022-04-06 06:54:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:54:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-06 06:54:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:01,459 INFO L225 Difference]: With dead ends: 237 [2022-04-06 06:54:01,459 INFO L226 Difference]: Without dead ends: 237 [2022-04-06 06:54:01,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:54:01,460 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:01,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:54:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-04-06 06:54:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-04-06 06:54:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 161 states have (on average 1.3664596273291925) internal successors, (220), 162 states have internal predecessors, (220), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 06:54:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 324 transitions. [2022-04-06 06:54:01,466 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 324 transitions. Word has length 39 [2022-04-06 06:54:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:01,466 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 324 transitions. [2022-04-06 06:54:01,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:54:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 324 transitions. [2022-04-06 06:54:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 06:54:01,467 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:01,467 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:01,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:01,683 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 [2022-04-06 06:54:01,683 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-04-06 06:54:01,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:01,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643573320] [2022-04-06 06:54:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:01,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:01,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:01,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878163507] [2022-04-06 06:54:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:01,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:01,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:01,711 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) [2022-04-06 06:54:01,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 06:54:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:01,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 06:54:01,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:54:01,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:54:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:54:02,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:02,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643573320] [2022-04-06 06:54:02,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:02,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878163507] [2022-04-06 06:54:02,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878163507] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:54:02,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:54:02,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 06:54:02,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822817806] [2022-04-06 06:54:02,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:54:02,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 06:54:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 06:54:02,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-06 06:54:02,053 INFO L87 Difference]: Start difference. First operand 230 states and 324 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 06:54:02,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:02,720 INFO L93 Difference]: Finished difference Result 390 states and 576 transitions. [2022-04-06 06:54:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 06:54:02,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-04-06 06:54:02,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:02,722 INFO L225 Difference]: With dead ends: 390 [2022-04-06 06:54:02,722 INFO L226 Difference]: Without dead ends: 390 [2022-04-06 06:54:02,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-04-06 06:54:02,723 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 152 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:02,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 366 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 06:54:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-04-06 06:54:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 377. [2022-04-06 06:54:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 266 states have (on average 1.4248120300751879) internal successors, (379), 267 states have internal predecessors, (379), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-06 06:54:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 563 transitions. [2022-04-06 06:54:02,732 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 563 transitions. Word has length 41 [2022-04-06 06:54:02,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:02,732 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 563 transitions. [2022-04-06 06:54:02,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 06:54:02,733 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 563 transitions. [2022-04-06 06:54:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 06:54:02,733 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:02,733 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:02,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:02,947 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 [2022-04-06 06:54:02,947 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-04-06 06:54:02,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:02,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453330341] [2022-04-06 06:54:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:02,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:02,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:02,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392233725] [2022-04-06 06:54:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:02,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:02,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:02,956 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) [2022-04-06 06:54:02,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 06:54:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:02,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:54:02,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 06:54:03,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:54:03,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:03,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453330341] [2022-04-06 06:54:03,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:03,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392233725] [2022-04-06 06:54:03,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392233725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:54:03,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:54:03,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:54:03,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186071179] [2022-04-06 06:54:03,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:54:03,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:54:03,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:03,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:54:03,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:54:03,059 INFO L87 Difference]: Start difference. First operand 377 states and 563 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 06:54:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:03,110 INFO L93 Difference]: Finished difference Result 564 states and 884 transitions. [2022-04-06 06:54:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:54:03,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-04-06 06:54:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:03,114 INFO L225 Difference]: With dead ends: 564 [2022-04-06 06:54:03,114 INFO L226 Difference]: Without dead ends: 564 [2022-04-06 06:54:03,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:54:03,115 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:03,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 166 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:54:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-04-06 06:54:03,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2022-04-06 06:54:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 307 states have (on average 1.4267100977198697) internal successors, (438), 327 states have internal predecessors, (438), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-04-06 06:54:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 774 transitions. [2022-04-06 06:54:03,155 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 774 transitions. Word has length 44 [2022-04-06 06:54:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:03,155 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 774 transitions. [2022-04-06 06:54:03,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 06:54:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 774 transitions. [2022-04-06 06:54:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 06:54:03,156 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:03,156 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:03,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:03,370 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 [2022-04-06 06:54:03,371 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-04-06 06:54:03,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:03,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974094889] [2022-04-06 06:54:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:03,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:03,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857632208] [2022-04-06 06:54:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:03,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:03,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:03,388 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) [2022-04-06 06:54:03,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 06:54:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 06:54:03,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 06:54:03,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:54:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 06:54:03,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:03,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974094889] [2022-04-06 06:54:03,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:03,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857632208] [2022-04-06 06:54:03,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857632208] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:54:03,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:54:03,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 06:54:03,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366864060] [2022-04-06 06:54:03,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:54:03,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 06:54:03,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:03,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 06:54:03,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:54:03,615 INFO L87 Difference]: Start difference. First operand 495 states and 774 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 06:54:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:03,748 INFO L93 Difference]: Finished difference Result 770 states and 1118 transitions. [2022-04-06 06:54:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 06:54:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-06 06:54:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:03,752 INFO L225 Difference]: With dead ends: 770 [2022-04-06 06:54:03,752 INFO L226 Difference]: Without dead ends: 770 [2022-04-06 06:54:03,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-04-06 06:54:03,752 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 158 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:03,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 272 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:54:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-04-06 06:54:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 736. [2022-04-06 06:54:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 471 states have (on average 1.3630573248407643) internal successors, (642), 495 states have internal predecessors, (642), 224 states have call successors, (224), 41 states have call predecessors, (224), 40 states have return successors, (219), 199 states have call predecessors, (219), 219 states have call successors, (219) [2022-04-06 06:54:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1085 transitions. [2022-04-06 06:54:03,771 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1085 transitions. Word has length 42 [2022-04-06 06:54:03,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:03,771 INFO L478 AbstractCegarLoop]: Abstraction has 736 states and 1085 transitions. [2022-04-06 06:54:03,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 06:54:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1085 transitions. [2022-04-06 06:54:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 06:54:03,772 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:03,772 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:03,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:03,986 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 [2022-04-06 06:54:03,986 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:03,987 INFO L85 PathProgramCache]: Analyzing trace with hash 841576990, now seen corresponding path program 1 times [2022-04-06 06:54:03,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:03,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848665547] [2022-04-06 06:54:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:03,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:03,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:03,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877434717] [2022-04-06 06:54:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:03,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:03,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:03,995 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) [2022-04-06 06:54:04,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 06:54:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:04,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 06:54:04,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:54:04,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:54:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:54:04,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:04,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848665547] [2022-04-06 06:54:04,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:04,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877434717] [2022-04-06 06:54:04,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877434717] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:54:04,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:54:04,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 06:54:04,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110355518] [2022-04-06 06:54:04,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:54:04,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 06:54:04,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:04,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 06:54:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 06:54:04,219 INFO L87 Difference]: Start difference. First operand 736 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 06:54:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:04,398 INFO L93 Difference]: Finished difference Result 1119 states and 1584 transitions. [2022-04-06 06:54:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 06:54:04,398 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-04-06 06:54:04,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:04,402 INFO L225 Difference]: With dead ends: 1119 [2022-04-06 06:54:04,402 INFO L226 Difference]: Without dead ends: 1119 [2022-04-06 06:54:04,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-04-06 06:54:04,402 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 222 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:04,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 416 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:54:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-04-06 06:54:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1072. [2022-04-06 06:54:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 697 states have (on average 1.3113342898134863) internal successors, (914), 730 states have internal predecessors, (914), 318 states have call successors, (318), 57 states have call predecessors, (318), 56 states have return successors, (311), 284 states have call predecessors, (311), 311 states have call successors, (311) [2022-04-06 06:54:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1543 transitions. [2022-04-06 06:54:04,424 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1543 transitions. Word has length 43 [2022-04-06 06:54:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:04,424 INFO L478 AbstractCegarLoop]: Abstraction has 1072 states and 1543 transitions. [2022-04-06 06:54:04,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 06:54:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1543 transitions. [2022-04-06 06:54:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 06:54:04,424 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:04,424 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:04,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:04,640 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 [2022-04-06 06:54:04,641 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:04,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:04,641 INFO L85 PathProgramCache]: Analyzing trace with hash -799775801, now seen corresponding path program 2 times [2022-04-06 06:54:04,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:04,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431260490] [2022-04-06 06:54:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:04,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:04,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:04,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418660329] [2022-04-06 06:54:04,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 06:54:04,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:04,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:04,648 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) [2022-04-06 06:54:04,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 06:54:04,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 06:54:04,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:54:04,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 06:54:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 06:54:04,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:54:04,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:04,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431260490] [2022-04-06 06:54:04,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:04,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418660329] [2022-04-06 06:54:04,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418660329] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:54:04,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:54:04,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:54:04,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212481640] [2022-04-06 06:54:04,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:54:04,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:54:04,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:04,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:54:04,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:54:04,745 INFO L87 Difference]: Start difference. First operand 1072 states and 1543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:54:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:04,810 INFO L93 Difference]: Finished difference Result 1234 states and 1815 transitions. [2022-04-06 06:54:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 06:54:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-04-06 06:54:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:04,814 INFO L225 Difference]: With dead ends: 1234 [2022-04-06 06:54:04,814 INFO L226 Difference]: Without dead ends: 1234 [2022-04-06 06:54:04,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 06:54:04,815 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:04,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 170 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:54:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-04-06 06:54:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 995. [2022-04-06 06:54:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 660 states have (on average 1.3015151515151515) internal successors, (859), 690 states have internal predecessors, (859), 278 states have call successors, (278), 57 states have call predecessors, (278), 56 states have return successors, (271), 247 states have call predecessors, (271), 271 states have call successors, (271) [2022-04-06 06:54:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1408 transitions. [2022-04-06 06:54:04,837 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1408 transitions. Word has length 44 [2022-04-06 06:54:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:04,837 INFO L478 AbstractCegarLoop]: Abstraction has 995 states and 1408 transitions. [2022-04-06 06:54:04,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:54:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1408 transitions. [2022-04-06 06:54:04,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 06:54:04,837 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:04,837 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:04,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:05,057 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 [2022-04-06 06:54:05,058 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-04-06 06:54:05,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:05,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493257362] [2022-04-06 06:54:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:05,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:05,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:05,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961101477] [2022-04-06 06:54:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:05,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:05,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:05,076 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) [2022-04-06 06:54:05,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 06:54:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 06:54:05,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 06:54:05,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:54:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 06:54:06,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:06,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493257362] [2022-04-06 06:54:06,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:06,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961101477] [2022-04-06 06:54:06,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961101477] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:54:06,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:54:06,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 06:54:06,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474707086] [2022-04-06 06:54:06,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:54:06,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 06:54:06,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:06,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 06:54:06,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-06 06:54:06,376 INFO L87 Difference]: Start difference. First operand 995 states and 1408 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-06 06:54:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:13,518 INFO L93 Difference]: Finished difference Result 1410 states and 2007 transitions. [2022-04-06 06:54:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 06:54:13,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-04-06 06:54:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:13,522 INFO L225 Difference]: With dead ends: 1410 [2022-04-06 06:54:13,522 INFO L226 Difference]: Without dead ends: 1404 [2022-04-06 06:54:13,523 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 06:54:13,523 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 175 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:13,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 511 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-04-06 06:54:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-04-06 06:54:13,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1226. [2022-04-06 06:54:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 845 states have (on average 1.2970414201183431) internal successors, (1096), 864 states have internal predecessors, (1096), 308 states have call successors, (308), 73 states have call predecessors, (308), 72 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-04-06 06:54:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1707 transitions. [2022-04-06 06:54:13,579 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1707 transitions. Word has length 58 [2022-04-06 06:54:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:13,579 INFO L478 AbstractCegarLoop]: Abstraction has 1226 states and 1707 transitions. [2022-04-06 06:54:13,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-06 06:54:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1707 transitions. [2022-04-06 06:54:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 06:54:13,580 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:13,580 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:13,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:13,796 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 [2022-04-06 06:54:13,796 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:13,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2022-04-06 06:54:13,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:13,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715850805] [2022-04-06 06:54:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:13,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:13,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:13,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6671859] [2022-04-06 06:54:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:13,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:13,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:13,808 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) [2022-04-06 06:54:13,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 06:54:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:13,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 06:54:13,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 06:54:13,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:54:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 06:54:14,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:14,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715850805] [2022-04-06 06:54:14,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:14,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6671859] [2022-04-06 06:54:14,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6671859] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:54:14,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:54:14,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 06:54:14,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477549070] [2022-04-06 06:54:14,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:54:14,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 06:54:14,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:14,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 06:54:14,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-06 06:54:14,136 INFO L87 Difference]: Start difference. First operand 1226 states and 1707 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 06:54:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:14,427 INFO L93 Difference]: Finished difference Result 2543 states and 3572 transitions. [2022-04-06 06:54:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 06:54:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 64 [2022-04-06 06:54:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:14,434 INFO L225 Difference]: With dead ends: 2543 [2022-04-06 06:54:14,434 INFO L226 Difference]: Without dead ends: 2543 [2022-04-06 06:54:14,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-04-06 06:54:14,435 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 370 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:14,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 510 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 06:54:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-04-06 06:54:14,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2406. [2022-04-06 06:54:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1658 states have (on average 1.3094089264173703) internal successors, (2171), 1717 states have internal predecessors, (2171), 631 states have call successors, (631), 117 states have call predecessors, (631), 116 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-04-06 06:54:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3425 transitions. [2022-04-06 06:54:14,475 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3425 transitions. Word has length 64 [2022-04-06 06:54:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:14,475 INFO L478 AbstractCegarLoop]: Abstraction has 2406 states and 3425 transitions. [2022-04-06 06:54:14,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 06:54:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3425 transitions. [2022-04-06 06:54:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 06:54:14,476 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:14,476 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:14,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:14,691 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 [2022-04-06 06:54:14,692 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2022-04-06 06:54:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028128511] [2022-04-06 06:54:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:14,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:14,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:14,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677886152] [2022-04-06 06:54:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:14,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:14,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:14,712 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) [2022-04-06 06:54:14,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 06:54:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:14,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 06:54:14,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 06:54:14,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:54:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 06:54:15,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028128511] [2022-04-06 06:54:15,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677886152] [2022-04-06 06:54:15,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677886152] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 06:54:15,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 06:54:15,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-06 06:54:15,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113703375] [2022-04-06 06:54:15,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:54:15,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:54:15,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:15,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:54:15,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 06:54:15,083 INFO L87 Difference]: Start difference. First operand 2406 states and 3425 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 06:54:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:15,140 INFO L93 Difference]: Finished difference Result 2465 states and 3473 transitions. [2022-04-06 06:54:15,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:54:15,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-04-06 06:54:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:15,147 INFO L225 Difference]: With dead ends: 2465 [2022-04-06 06:54:15,147 INFO L226 Difference]: Without dead ends: 2465 [2022-04-06 06:54:15,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:54:15,148 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:15,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 147 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:54:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-04-06 06:54:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2442. [2022-04-06 06:54:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 1685 states have (on average 1.3032640949554897) internal successors, (2196), 1744 states have internal predecessors, (2196), 631 states have call successors, (631), 126 states have call predecessors, (631), 125 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-04-06 06:54:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3450 transitions. [2022-04-06 06:54:15,208 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3450 transitions. Word has length 67 [2022-04-06 06:54:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:15,208 INFO L478 AbstractCegarLoop]: Abstraction has 2442 states and 3450 transitions. [2022-04-06 06:54:15,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 06:54:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3450 transitions. [2022-04-06 06:54:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 06:54:15,213 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:15,213 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:15,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:15,428 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 [2022-04-06 06:54:15,429 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:15,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1422612783, now seen corresponding path program 1 times [2022-04-06 06:54:15,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:15,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817094154] [2022-04-06 06:54:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:15,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:15,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:15,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361455127] [2022-04-06 06:54:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:15,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:15,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:15,438 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) [2022-04-06 06:54:15,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 06:54:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 06:54:15,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 06:54:15,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:54:15,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:15,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817094154] [2022-04-06 06:54:15,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:15,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361455127] [2022-04-06 06:54:15,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361455127] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:54:15,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:54:15,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:54:15,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058570082] [2022-04-06 06:54:15,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:54:15,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:54:15,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:15,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:54:15,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:54:15,598 INFO L87 Difference]: Start difference. First operand 2442 states and 3450 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 06:54:15,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:15,641 INFO L93 Difference]: Finished difference Result 2578 states and 3563 transitions. [2022-04-06 06:54:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 06:54:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-04-06 06:54:15,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:15,648 INFO L225 Difference]: With dead ends: 2578 [2022-04-06 06:54:15,648 INFO L226 Difference]: Without dead ends: 2578 [2022-04-06 06:54:15,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:54:15,649 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:15,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:54:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-04-06 06:54:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2372. [2022-04-06 06:54:15,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1689 states have (on average 1.2948490230905862) internal successors, (2187), 1720 states have internal predecessors, (2187), 559 states have call successors, (559), 124 states have call predecessors, (559), 123 states have return successors, (551), 527 states have call predecessors, (551), 551 states have call successors, (551) [2022-04-06 06:54:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3297 transitions. [2022-04-06 06:54:15,689 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3297 transitions. Word has length 73 [2022-04-06 06:54:15,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:15,690 INFO L478 AbstractCegarLoop]: Abstraction has 2372 states and 3297 transitions. [2022-04-06 06:54:15,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 06:54:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3297 transitions. [2022-04-06 06:54:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 06:54:15,690 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:15,691 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:15,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:15,903 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 [2022-04-06 06:54:15,903 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 2 times [2022-04-06 06:54:15,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:15,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210847944] [2022-04-06 06:54:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:15,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:15,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:15,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395159085] [2022-04-06 06:54:15,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 06:54:15,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:15,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:15,923 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) [2022-04-06 06:54:15,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 06:54:15,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 06:54:15,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:54:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 06:54:15,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 06:54:16,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:54:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 06:54:17,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:17,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210847944] [2022-04-06 06:54:17,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:17,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395159085] [2022-04-06 06:54:17,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395159085] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:54:17,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:54:17,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-04-06 06:54:17,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418254349] [2022-04-06 06:54:17,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:54:17,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 06:54:17,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:17,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 06:54:17,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-04-06 06:54:17,961 INFO L87 Difference]: Start difference. First operand 2372 states and 3297 transitions. Second operand has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-06 06:54:32,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:54:32,314 INFO L93 Difference]: Finished difference Result 2867 states and 3884 transitions. [2022-04-06 06:54:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 06:54:32,328 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 75 [2022-04-06 06:54:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:54:32,337 INFO L225 Difference]: With dead ends: 2867 [2022-04-06 06:54:32,337 INFO L226 Difference]: Without dead ends: 2863 [2022-04-06 06:54:32,337 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 06:54:32,352 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 303 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:54:32,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 614 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-04-06 06:54:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-04-06 06:54:32,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2736. [2022-04-06 06:54:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1985 states have (on average 1.2916876574307306) internal successors, (2564), 2026 states have internal predecessors, (2564), 594 states have call successors, (594), 158 states have call predecessors, (594), 156 states have return successors, (587), 551 states have call predecessors, (587), 587 states have call successors, (587) [2022-04-06 06:54:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 3745 transitions. [2022-04-06 06:54:32,416 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 3745 transitions. Word has length 75 [2022-04-06 06:54:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:54:32,416 INFO L478 AbstractCegarLoop]: Abstraction has 2736 states and 3745 transitions. [2022-04-06 06:54:32,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-06 06:54:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 3745 transitions. [2022-04-06 06:54:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 06:54:32,418 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:54:32,418 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:54:32,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 06:54:32,634 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 [2022-04-06 06:54:32,634 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:54:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:54:32,635 INFO L85 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 1 times [2022-04-06 06:54:32,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:54:32,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536048665] [2022-04-06 06:54:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:32,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:54:32,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:54:32,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454508669] [2022-04-06 06:54:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:54:32,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:54:32,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:54:32,646 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) [2022-04-06 06:54:32,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 06:54:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:54:32,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 06:54:32,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:54:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-04-06 06:54:33,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:54:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 06:54:41,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:54:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536048665] [2022-04-06 06:54:41,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:54:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454508669] [2022-04-06 06:54:41,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454508669] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:54:41,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:54:41,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-04-06 06:54:41,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088124081] [2022-04-06 06:54:41,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:54:41,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 06:54:41,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:54:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 06:54:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-04-06 06:54:41,877 INFO L87 Difference]: Start difference. First operand 2736 states and 3745 transitions. Second operand has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-06 06:54:54,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:54:59,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:55:13,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:55:32,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:55:34,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:55:44,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:55:45,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:55:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:55:51,942 INFO L93 Difference]: Finished difference Result 3518 states and 4796 transitions. [2022-04-06 06:55:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 06:55:51,944 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 88 [2022-04-06 06:55:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:55:51,961 INFO L225 Difference]: With dead ends: 3518 [2022-04-06 06:55:51,961 INFO L226 Difference]: Without dead ends: 3489 [2022-04-06 06:55:51,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=1919, Invalid=9423, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 06:55:51,964 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 380 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 487 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:55:51,964 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 1009 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1978 Invalid, 4 Unknown, 0 Unchecked, 26.0s Time] [2022-04-06 06:55:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-04-06 06:55:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 3104. [2022-04-06 06:55:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2243 states have (on average 1.2982612572447614) internal successors, (2912), 2289 states have internal predecessors, (2912), 685 states have call successors, (685), 177 states have call predecessors, (685), 175 states have return successors, (678), 637 states have call predecessors, (678), 678 states have call successors, (678) [2022-04-06 06:55:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 4275 transitions. [2022-04-06 06:55:52,023 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 4275 transitions. Word has length 88 [2022-04-06 06:55:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:55:52,024 INFO L478 AbstractCegarLoop]: Abstraction has 3104 states and 4275 transitions. [2022-04-06 06:55:52,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-06 06:55:52,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 4275 transitions. [2022-04-06 06:55:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 06:55:52,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:55:52,026 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:55:52,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 06:55:52,241 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 [2022-04-06 06:55:52,242 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:55:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:55:52,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 3 times [2022-04-06 06:55:52,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:55:52,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965034091] [2022-04-06 06:55:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:55:52,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:55:52,255 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:55:52,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420197096] [2022-04-06 06:55:52,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 06:55:52,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:55:52,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:55:52,256 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) [2022-04-06 06:55:52,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 06:55:52,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 06:55:52,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:55:52,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 06:55:52,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:55:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-06 06:55:52,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:55:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-06 06:55:53,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:55:53,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965034091] [2022-04-06 06:55:53,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:55:53,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420197096] [2022-04-06 06:55:53,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420197096] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:55:53,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:55:53,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 06:55:53,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68262155] [2022-04-06 06:55:53,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:55:53,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 06:55:53,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:55:53,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 06:55:53,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-04-06 06:55:53,015 INFO L87 Difference]: Start difference. First operand 3104 states and 4275 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 06:55:55,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:55:57,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:55:59,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:56:02,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:56:04,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:56:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:05,196 INFO L93 Difference]: Finished difference Result 3308 states and 4553 transitions. [2022-04-06 06:56:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 06:56:05,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 97 [2022-04-06 06:56:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:05,205 INFO L225 Difference]: With dead ends: 3308 [2022-04-06 06:56:05,205 INFO L226 Difference]: Without dead ends: 3298 [2022-04-06 06:56:05,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-04-06 06:56:05,205 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 97 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 118 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:05,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 466 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 624 Invalid, 4 Unknown, 0 Unchecked, 11.7s Time] [2022-04-06 06:56:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2022-04-06 06:56:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 3031. [2022-04-06 06:56:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 2175 states have (on average 1.2974712643678161) internal successors, (2822), 2216 states have internal predecessors, (2822), 680 states have call successors, (680), 177 states have call predecessors, (680), 175 states have return successors, (678), 637 states have call predecessors, (678), 678 states have call successors, (678) [2022-04-06 06:56:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 4180 transitions. [2022-04-06 06:56:05,243 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 4180 transitions. Word has length 97 [2022-04-06 06:56:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:05,244 INFO L478 AbstractCegarLoop]: Abstraction has 3031 states and 4180 transitions. [2022-04-06 06:56:05,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 06:56:05,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 4180 transitions. [2022-04-06 06:56:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 06:56:05,245 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:05,245 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:05,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:05,463 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 [2022-04-06 06:56:05,464 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1037830812, now seen corresponding path program 1 times [2022-04-06 06:56:05,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:05,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486428020] [2022-04-06 06:56:05,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:05,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:05,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:05,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565734699] [2022-04-06 06:56:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:05,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:05,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:05,476 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) [2022-04-06 06:56:05,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 06:56:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:05,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 06:56:05,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 06:56:05,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 06:56:06,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:06,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486428020] [2022-04-06 06:56:06,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:06,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565734699] [2022-04-06 06:56:06,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565734699] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:06,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:06,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-04-06 06:56:06,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159099728] [2022-04-06 06:56:06,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:06,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 06:56:06,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 06:56:06,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 06:56:06,036 INFO L87 Difference]: Start difference. First operand 3031 states and 4180 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 06:56:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:06,576 INFO L93 Difference]: Finished difference Result 5780 states and 8028 transitions. [2022-04-06 06:56:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 06:56:06,577 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 98 [2022-04-06 06:56:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:06,602 INFO L225 Difference]: With dead ends: 5780 [2022-04-06 06:56:06,603 INFO L226 Difference]: Without dead ends: 5780 [2022-04-06 06:56:06,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 06:56:06,604 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 543 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:06,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 623 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 06:56:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2022-04-06 06:56:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 5473. [2022-04-06 06:56:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 3689 states have (on average 1.2881539712659258) internal successors, (4752), 3711 states have internal predecessors, (4752), 1477 states have call successors, (1477), 308 states have call predecessors, (1477), 306 states have return successors, (1475), 1453 states have call predecessors, (1475), 1475 states have call successors, (1475) [2022-04-06 06:56:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 7704 transitions. [2022-04-06 06:56:06,682 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 7704 transitions. Word has length 98 [2022-04-06 06:56:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:06,683 INFO L478 AbstractCegarLoop]: Abstraction has 5473 states and 7704 transitions. [2022-04-06 06:56:06,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 06:56:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 7704 transitions. [2022-04-06 06:56:06,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 06:56:06,684 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:06,684 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:06,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:06,899 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 [2022-04-06 06:56:06,899 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:06,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 2 times [2022-04-06 06:56:06,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:06,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182250142] [2022-04-06 06:56:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:06,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:06,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:06,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221082950] [2022-04-06 06:56:06,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 06:56:06,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:06,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:06,923 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) [2022-04-06 06:56:06,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 06:56:06,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 06:56:06,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:56:06,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 06:56:06,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-04-06 06:56:07,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 06:56:08,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:08,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182250142] [2022-04-06 06:56:08,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:08,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221082950] [2022-04-06 06:56:08,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221082950] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:08,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:08,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-04-06 06:56:08,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906465057] [2022-04-06 06:56:08,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:08,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 06:56:08,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 06:56:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-04-06 06:56:08,921 INFO L87 Difference]: Start difference. First operand 5473 states and 7704 transitions. Second operand has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 06:56:13,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:56:17,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:56:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:18,479 INFO L93 Difference]: Finished difference Result 6523 states and 9160 transitions. [2022-04-06 06:56:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 06:56:18,480 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 108 [2022-04-06 06:56:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:18,491 INFO L225 Difference]: With dead ends: 6523 [2022-04-06 06:56:18,491 INFO L226 Difference]: Without dead ends: 6519 [2022-04-06 06:56:18,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 06:56:18,492 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 238 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 388 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:18,492 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 677 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1234 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2022-04-06 06:56:18,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6519 states. [2022-04-06 06:56:18,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6519 to 5895. [2022-04-06 06:56:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5895 states, 3906 states have (on average 1.296979006656426) internal successors, (5066), 3928 states have internal predecessors, (5066), 1657 states have call successors, (1657), 333 states have call predecessors, (1657), 331 states have return successors, (1655), 1633 states have call predecessors, (1655), 1655 states have call successors, (1655) [2022-04-06 06:56:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5895 states to 5895 states and 8378 transitions. [2022-04-06 06:56:18,596 INFO L78 Accepts]: Start accepts. Automaton has 5895 states and 8378 transitions. Word has length 108 [2022-04-06 06:56:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:18,597 INFO L478 AbstractCegarLoop]: Abstraction has 5895 states and 8378 transitions. [2022-04-06 06:56:18,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 06:56:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 5895 states and 8378 transitions. [2022-04-06 06:56:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 06:56:18,598 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:18,598 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:18,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 06:56:18,816 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 [2022-04-06 06:56:18,816 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash -55503749, now seen corresponding path program 1 times [2022-04-06 06:56:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:18,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079171470] [2022-04-06 06:56:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:18,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:18,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:18,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40256055] [2022-04-06 06:56:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:18,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:18,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:18,825 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) [2022-04-06 06:56:18,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 06:56:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:56:18,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 06:56:18,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 06:56:19,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 06:56:19,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:19,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079171470] [2022-04-06 06:56:19,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:19,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40256055] [2022-04-06 06:56:19,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40256055] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:19,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:19,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-04-06 06:56:19,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093088884] [2022-04-06 06:56:19,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:19,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 06:56:19,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 06:56:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-04-06 06:56:19,343 INFO L87 Difference]: Start difference. First operand 5895 states and 8378 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 06:56:19,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:19,792 INFO L93 Difference]: Finished difference Result 6810 states and 9298 transitions. [2022-04-06 06:56:19,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 06:56:19,792 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 105 [2022-04-06 06:56:19,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:19,804 INFO L225 Difference]: With dead ends: 6810 [2022-04-06 06:56:19,805 INFO L226 Difference]: Without dead ends: 6810 [2022-04-06 06:56:19,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 06:56:19,806 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 742 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:19,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 740 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 06:56:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6810 states. [2022-04-06 06:56:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6810 to 6645. [2022-04-06 06:56:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6645 states, 4338 states have (on average 1.2157676348547717) internal successors, (5274), 4356 states have internal predecessors, (5274), 1929 states have call successors, (1929), 379 states have call predecessors, (1929), 377 states have return successors, (1927), 1909 states have call predecessors, (1927), 1927 states have call successors, (1927) [2022-04-06 06:56:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6645 states to 6645 states and 9130 transitions. [2022-04-06 06:56:19,904 INFO L78 Accepts]: Start accepts. Automaton has 6645 states and 9130 transitions. Word has length 105 [2022-04-06 06:56:19,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:19,904 INFO L478 AbstractCegarLoop]: Abstraction has 6645 states and 9130 transitions. [2022-04-06 06:56:19,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 06:56:19,904 INFO L276 IsEmpty]: Start isEmpty. Operand 6645 states and 9130 transitions. [2022-04-06 06:56:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 06:56:19,906 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:19,907 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:19,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:20,119 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 [2022-04-06 06:56:20,119 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1765875055, now seen corresponding path program 2 times [2022-04-06 06:56:20,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163207604] [2022-04-06 06:56:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:20,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:20,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:20,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866311775] [2022-04-06 06:56:20,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 06:56:20,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:20,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:20,130 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) [2022-04-06 06:56:20,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 06:56:20,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 06:56:20,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:56:20,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 06:56:20,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 06:56:20,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 06:56:20,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:20,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163207604] [2022-04-06 06:56:20,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:20,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866311775] [2022-04-06 06:56:20,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866311775] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:20,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:20,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-04-06 06:56:20,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452264358] [2022-04-06 06:56:20,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:20,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 06:56:20,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:20,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 06:56:20,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 06:56:20,699 INFO L87 Difference]: Start difference. First operand 6645 states and 9130 transitions. Second operand has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-04-06 06:56:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:21,615 INFO L93 Difference]: Finished difference Result 12247 states and 17288 transitions. [2022-04-06 06:56:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 06:56:21,616 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) Word has length 132 [2022-04-06 06:56:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:21,646 INFO L225 Difference]: With dead ends: 12247 [2022-04-06 06:56:21,646 INFO L226 Difference]: Without dead ends: 12247 [2022-04-06 06:56:21,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 06:56:21,647 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 957 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:21,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 846 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 06:56:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12247 states. [2022-04-06 06:56:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12247 to 11761. [2022-04-06 06:56:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11761 states, 7852 states have (on average 1.2781456953642385) internal successors, (10036), 7945 states have internal predecessors, (10036), 3352 states have call successors, (3352), 558 states have call predecessors, (3352), 556 states have return successors, (3350), 3257 states have call predecessors, (3350), 3350 states have call successors, (3350) [2022-04-06 06:56:21,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11761 states to 11761 states and 16738 transitions. [2022-04-06 06:56:21,853 INFO L78 Accepts]: Start accepts. Automaton has 11761 states and 16738 transitions. Word has length 132 [2022-04-06 06:56:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:21,853 INFO L478 AbstractCegarLoop]: Abstraction has 11761 states and 16738 transitions. [2022-04-06 06:56:21,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-04-06 06:56:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 11761 states and 16738 transitions. [2022-04-06 06:56:21,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 06:56:21,857 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:21,858 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:21,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 06:56:22,074 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 [2022-04-06 06:56:22,074 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:22,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2087386651, now seen corresponding path program 3 times [2022-04-06 06:56:22,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:22,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536079899] [2022-04-06 06:56:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:22,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:22,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:22,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785692387] [2022-04-06 06:56:22,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 06:56:22,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:22,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:22,087 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) [2022-04-06 06:56:22,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 06:56:22,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-06 06:56:22,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:56:22,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 06:56:22,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 368 proven. 21 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-06 06:56:22,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:56:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 120 proven. 21 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-04-06 06:56:22,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:56:22,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536079899] [2022-04-06 06:56:22,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:56:22,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785692387] [2022-04-06 06:56:22,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785692387] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:56:22,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:56:22,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-04-06 06:56:22,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660751690] [2022-04-06 06:56:22,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:56:22,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 06:56:22,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:56:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 06:56:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 06:56:22,677 INFO L87 Difference]: Start difference. First operand 11761 states and 16738 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-04-06 06:56:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:56:22,845 INFO L93 Difference]: Finished difference Result 15572 states and 22416 transitions. [2022-04-06 06:56:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 06:56:22,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 165 [2022-04-06 06:56:22,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:56:22,877 INFO L225 Difference]: With dead ends: 15572 [2022-04-06 06:56:22,877 INFO L226 Difference]: Without dead ends: 15572 [2022-04-06 06:56:22,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:56:22,878 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 27 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:56:22,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 289 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 06:56:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15572 states. [2022-04-06 06:56:23,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15572 to 12971. [2022-04-06 06:56:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12971 states, 8666 states have (on average 1.2915993537964459) internal successors, (11193), 8845 states have internal predecessors, (11193), 3802 states have call successors, (3802), 504 states have call predecessors, (3802), 502 states have return successors, (3800), 3621 states have call predecessors, (3800), 3800 states have call successors, (3800) [2022-04-06 06:56:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12971 states to 12971 states and 18795 transitions. [2022-04-06 06:56:23,160 INFO L78 Accepts]: Start accepts. Automaton has 12971 states and 18795 transitions. Word has length 165 [2022-04-06 06:56:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:56:23,161 INFO L478 AbstractCegarLoop]: Abstraction has 12971 states and 18795 transitions. [2022-04-06 06:56:23,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-04-06 06:56:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 12971 states and 18795 transitions. [2022-04-06 06:56:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-04-06 06:56:23,166 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:56:23,166 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:56:23,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 06:56:23,379 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 [2022-04-06 06:56:23,379 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:56:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:56:23,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1051070357, now seen corresponding path program 4 times [2022-04-06 06:56:23,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:56:23,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064290801] [2022-04-06 06:56:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:56:23,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:56:23,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:56:23,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506128656] [2022-04-06 06:56:23,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 06:56:23,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:56:23,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:56:23,391 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) [2022-04-06 06:56:23,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 06:56:23,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 06:56:23,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 06:56:23,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 127 conjunts are in the unsatisfiable core [2022-04-06 06:56:23,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:56:26,553 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 06:57:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 270 proven. 286 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2022-04-06 06:57:10,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:57:32,964 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 06:57:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 313 proven. 117 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2022-04-06 06:57:46,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:57:46,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064290801] [2022-04-06 06:57:46,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:57:46,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506128656] [2022-04-06 06:57:46,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506128656] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:57:46,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:57:46,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21] total 45 [2022-04-06 06:57:46,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238859315] [2022-04-06 06:57:46,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:57:46,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 06:57:46,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:57:46,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 06:57:46,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1659, Unknown=5, NotChecked=0, Total=1980 [2022-04-06 06:57:46,351 INFO L87 Difference]: Start difference. First operand 12971 states and 18795 transitions. Second operand has 45 states, 40 states have (on average 2.85) internal successors, (114), 38 states have internal predecessors, (114), 20 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (53), 18 states have call predecessors, (53), 18 states have call successors, (53) [2022-04-06 06:58:23,995 WARN L232 SmtUtils]: Spent 28.60s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 06:58:25,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:58:28,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:58:30,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:59:31,851 WARN L232 SmtUtils]: Spent 56.13s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:00:08,431 WARN L232 SmtUtils]: Spent 24.63s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:00:10,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:00:12,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:00:14,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:00:16,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:00:19,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:00:21,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:00:24,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:00:27,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:00:29,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:00:31,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:01:32,801 WARN L232 SmtUtils]: Spent 49.95s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:02:39,977 WARN L232 SmtUtils]: Spent 1.05m on a formula simplification. DAG size of input: 144 DAG size of output: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:03:48,862 WARN L232 SmtUtils]: Spent 58.50s on a formula simplification. DAG size of input: 126 DAG size of output: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:03:50,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:03:52,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:04:23,252 WARN L232 SmtUtils]: Spent 22.06s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:04:24,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:04:26,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:04:55,318 WARN L232 SmtUtils]: Spent 22.38s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:04:57,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:04:59,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:05:11,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:05:13,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:05:16,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:22,658 WARN L232 SmtUtils]: Spent 47.94s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:06:34,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:07:28,545 WARN L232 SmtUtils]: Spent 45.57s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:08:08,308 WARN L232 SmtUtils]: Spent 23.33s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:08:10,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:08:12,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:08:14,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:08:29,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:08:31,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:08:33,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:08:35,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:08:36,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []