/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/hard-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 15:00:04,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 15:00:04,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 15:00:04,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 15:00:04,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 15:00:04,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 15:00:04,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 15:00:04,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 15:00:04,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 15:00:04,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 15:00:04,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 15:00:04,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 15:00:04,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 15:00:04,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 15:00:04,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 15:00:04,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 15:00:04,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 15:00:04,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 15:00:04,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 15:00:04,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 15:00:04,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 15:00:04,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 15:00:04,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 15:00:04,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 15:00:04,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 15:00:04,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 15:00:04,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 15:00:04,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 15:00:04,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 15:00:04,911 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 15:00:04,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 15:00:04,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 15:00:04,913 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 15:00:04,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 15:00:04,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 15:00:04,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 15:00:04,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 15:00:04,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 15:00:04,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 15:00:04,913 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 15:00:04,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 15:00:04,914 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 15:00:04,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 15:00:04,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 15:00:04,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 15:00:04,914 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 15:00:04,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 15:00:04,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 15:00:04,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 15:00:04,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 15:00:04,915 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 15:00:04,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 15:00:05,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 15:00:05,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 15:00:05,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 15:00:05,129 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 15:00:05,135 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 15:00:05,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2022-01-31 15:00:05,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d290a8ab3/229d210edf0c40d7ab229df1a89fa5c9/FLAG4f707358b [2022-01-31 15:00:05,556 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 15:00:05,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2022-01-31 15:00:05,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d290a8ab3/229d210edf0c40d7ab229df1a89fa5c9/FLAG4f707358b [2022-01-31 15:00:05,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d290a8ab3/229d210edf0c40d7ab229df1a89fa5c9 [2022-01-31 15:00:05,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 15:00:05,578 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 15:00:05,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 15:00:05,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 15:00:05,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 15:00:05,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:00:05" (1/1) ... [2022-01-31 15:00:05,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@319c8159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:00:05, skipping insertion in model container [2022-01-31 15:00:05,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:00:05" (1/1) ... [2022-01-31 15:00:05,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 15:00:05,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 15:00:05,705 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/hard-u_valuebound1.c[537,550] [2022-01-31 15:00:05,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 15:00:05,736 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 15:00:05,743 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/hard-u_valuebound1.c[537,550] [2022-01-31 15:00:05,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 15:00:05,756 INFO L208 MainTranslator]: Completed translation [2022-01-31 15:00:05,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:00:05 WrapperNode [2022-01-31 15:00:05,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 15:00:05,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 15:00:05,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 15:00:05,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 15:00:05,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:00:05" (1/1) ... [2022-01-31 15:00:05,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:00:05" (1/1) ... [2022-01-31 15:00:05,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:00:05" (1/1) ... [2022-01-31 15:00:05,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:00:05" (1/1) ... [2022-01-31 15:00:05,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:00:05" (1/1) ... [2022-01-31 15:00:05,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:00:05" (1/1) ... [2022-01-31 15:00:05,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:00:05" (1/1) ... [2022-01-31 15:00:05,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 15:00:05,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 15:00:05,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 15:00:05,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 15:00:05,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:00:05" (1/1) ... [2022-01-31 15:00:05,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 15:00:05,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:00:05,824 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) [2022-01-31 15:00:05,830 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 [2022-01-31 15:00:05,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 15:00:05,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 15:00:05,849 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 15:00:05,849 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 15:00:05,849 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 15:00:05,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 15:00:05,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 15:00:05,849 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 15:00:05,849 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 15:00:05,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 15:00:05,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 15:00:05,850 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 15:00:05,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 15:00:05,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 15:00:05,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 15:00:05,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 15:00:05,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 15:00:05,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 15:00:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 15:00:05,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 15:00:05,903 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 15:00:05,904 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 15:00:06,086 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 15:00:06,090 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 15:00:06,090 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 15:00:06,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:00:06 BoogieIcfgContainer [2022-01-31 15:00:06,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 15:00:06,092 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 15:00:06,092 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 15:00:06,093 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 15:00:06,095 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:00:06" (1/1) ... [2022-01-31 15:00:06,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 03:00:06 BasicIcfg [2022-01-31 15:00:06,109 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 15:00:06,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 15:00:06,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 15:00:06,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 15:00:06,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 03:00:05" (1/4) ... [2022-01-31 15:00:06,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1558aedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:00:06, skipping insertion in model container [2022-01-31 15:00:06,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:00:05" (2/4) ... [2022-01-31 15:00:06,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1558aedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:00:06, skipping insertion in model container [2022-01-31 15:00:06,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:00:06" (3/4) ... [2022-01-31 15:00:06,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1558aedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 03:00:06, skipping insertion in model container [2022-01-31 15:00:06,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 03:00:06" (4/4) ... [2022-01-31 15:00:06,114 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.cJordan [2022-01-31 15:00:06,117 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 15:00:06,117 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 15:00:06,148 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 15:00:06,154 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 15:00:06,155 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 15:00:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 15:00:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 15:00:06,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:00:06,183 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:00:06,184 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:00:06,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:00:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-01-31 15:00:06,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:00:06,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009922023] [2022-01-31 15:00:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:06,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:00:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:06,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:00:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:06,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 15:00:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:06,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 15:00:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:06,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 15:00:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:00:06,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:00:06,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009922023] [2022-01-31 15:00:06,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009922023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:00:06,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:00:06,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 15:00:06,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263640831] [2022-01-31 15:00:06,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:00:06,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 15:00:06,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:00:06,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 15:00:06,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 15:00:06,408 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 15:00:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:00:06,478 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-01-31 15:00:06,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 15:00:06,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-01-31 15:00:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:00:06,485 INFO L225 Difference]: With dead ends: 38 [2022-01-31 15:00:06,485 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 15:00:06,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 15:00:06,491 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 15:00:06,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 15:00:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 15:00:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 15:00:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 15:00:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-01-31 15:00:06,522 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-01-31 15:00:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:00:06,523 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-01-31 15:00:06,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 15:00:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-01-31 15:00:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 15:00:06,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:00:06,525 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:00:06,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 15:00:06,526 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:00:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:00:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-01-31 15:00:06,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:00:06,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120987541] [2022-01-31 15:00:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:06,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:00:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:06,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:00:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:06,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 15:00:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:06,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 15:00:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:06,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 15:00:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:00:06,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:00:06,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120987541] [2022-01-31 15:00:06,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120987541] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:00:06,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:00:06,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 15:00:06,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276743239] [2022-01-31 15:00:06,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:00:06,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 15:00:06,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:00:06,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 15:00:06,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:00:06,656 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 15:00:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:00:06,861 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-01-31 15:00:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 15:00:06,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-01-31 15:00:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:00:06,863 INFO L225 Difference]: With dead ends: 44 [2022-01-31 15:00:06,864 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 15:00:06,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:00:06,867 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:00:06,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:00:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 15:00:06,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-01-31 15:00:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 15:00:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-01-31 15:00:06,873 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-01-31 15:00:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:00:06,873 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-01-31 15:00:06,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 15:00:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-01-31 15:00:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 15:00:06,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:00:06,874 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:00:06,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 15:00:06,875 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:00:06,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:00:06,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-01-31 15:00:06,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:00:06,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44508786] [2022-01-31 15:00:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:06,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:00:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:06,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 15:00:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:07,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 15:00:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:07,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 15:00:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:07,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 15:00:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:07,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 15:00:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 15:00:07,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:00:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44508786] [2022-01-31 15:00:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44508786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:00:07,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:00:07,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 15:00:07,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277061247] [2022-01-31 15:00:07,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:00:07,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 15:00:07,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:00:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 15:00:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:00:07,024 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:00:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:00:07,180 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-01-31 15:00:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 15:00:07,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 33 [2022-01-31 15:00:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:00:07,183 INFO L225 Difference]: With dead ends: 48 [2022-01-31 15:00:07,184 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 15:00:07,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 15:00:07,188 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:00:07,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 15:00:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 15:00:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-01-31 15:00:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 15:00:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-01-31 15:00:07,196 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-01-31 15:00:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:00:07,196 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-01-31 15:00:07,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 15:00:07,196 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-01-31 15:00:07,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 15:00:07,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:00:07,197 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:00:07,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 15:00:07,197 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:00:07,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:00:07,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-01-31 15:00:07,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:00:07,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269637158] [2022-01-31 15:00:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:07,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:00:07,222 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:00:07,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361923722] [2022-01-31 15:00:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:07,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:00:07,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:00:07,226 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) [2022-01-31 15:00:07,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 15:00:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:07,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 15:00:07,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:00:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 15:00:07,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 15:00:07,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:00:07,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269637158] [2022-01-31 15:00:07,442 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:00:07,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361923722] [2022-01-31 15:00:07,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361923722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 15:00:07,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 15:00:07,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 15:00:07,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822924030] [2022-01-31 15:00:07,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:00:07,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 15:00:07,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:00:07,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 15:00:07,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 15:00:07,444 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-01-31 15:00:09,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 15:00:09,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:00:09,655 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-01-31 15:00:09,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:00:09,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 38 [2022-01-31 15:00:09,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:00:09,656 INFO L225 Difference]: With dead ends: 56 [2022-01-31 15:00:09,656 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 15:00:09,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 15:00:09,657 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 15:00:09,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 15:00:09,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 15:00:09,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-31 15:00:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 15:00:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-01-31 15:00:09,662 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2022-01-31 15:00:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:00:09,663 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-01-31 15:00:09,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-01-31 15:00:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-01-31 15:00:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 15:00:09,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:00:09,664 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2022-01-31 15:00:09,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 15:00:09,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:00:09,880 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:00:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:00:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-01-31 15:00:09,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:00:09,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965469439] [2022-01-31 15:00:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:09,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:00:09,889 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:00:09,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144243606] [2022-01-31 15:00:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:09,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:00:09,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:00:09,890 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) [2022-01-31 15:00:09,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 15:00:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:09,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 15:00:09,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:00:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 15:00:10,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:00:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 15:00:10,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:00:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965469439] [2022-01-31 15:00:10,460 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:00:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144243606] [2022-01-31 15:00:10,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144243606] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 15:00:10,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 15:00:10,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-01-31 15:00:10,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662207881] [2022-01-31 15:00:10,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:00:10,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 15:00:10,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:00:10,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 15:00:10,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-31 15:00:10,462 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 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) [2022-01-31 15:00:12,518 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 [] [2022-01-31 15:00:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:00:12,633 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-01-31 15:00:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:00:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 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 45 [2022-01-31 15:00:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:00:12,634 INFO L225 Difference]: With dead ends: 66 [2022-01-31 15:00:12,634 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 15:00:12,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-01-31 15:00:12,635 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 15:00:12,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 15:00:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 15:00:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-01-31 15:00:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 15:00:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-01-31 15:00:12,641 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 45 [2022-01-31 15:00:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:00:12,641 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-01-31 15:00:12,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 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) [2022-01-31 15:00:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-01-31 15:00:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 15:00:12,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:00:12,642 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:00:12,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 15:00:12,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:00:12,855 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:00:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:00:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-01-31 15:00:12,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:00:12,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027842419] [2022-01-31 15:00:12,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:12,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:00:12,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:00:12,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577390151] [2022-01-31 15:00:12,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:12,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:00:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:00:12,866 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) [2022-01-31 15:00:12,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 15:00:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:12,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 15:00:12,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:00:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 15:00:13,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:00:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 15:00:13,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:00:13,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027842419] [2022-01-31 15:00:13,407 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:00:13,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577390151] [2022-01-31 15:00:13,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577390151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 15:00:13,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 15:00:13,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-01-31 15:00:13,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773205490] [2022-01-31 15:00:13,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 15:00:13,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 15:00:13,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:00:13,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 15:00:13,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-31 15:00:13,409 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-31 15:00:15,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 15:00:18,206 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 [] [2022-01-31 15:00:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:00:18,504 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-01-31 15:00:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 15:00:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 55 [2022-01-31 15:00:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:00:18,506 INFO L225 Difference]: With dead ends: 84 [2022-01-31 15:00:18,506 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 15:00:18,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-31 15:00:18,507 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-01-31 15:00:18,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 168 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 158 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2022-01-31 15:00:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 15:00:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-31 15:00:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 50 states have internal predecessors, (56), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 15:00:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-01-31 15:00:18,514 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 55 [2022-01-31 15:00:18,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:00:18,514 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-01-31 15:00:18,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-31 15:00:18,514 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-01-31 15:00:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 15:00:18,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:00:18,515 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 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] [2022-01-31 15:00:18,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 15:00:18,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:00:18,720 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:00:18,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:00:18,721 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-01-31 15:00:18,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:00:18,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262813820] [2022-01-31 15:00:18,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:18,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:00:18,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:00:18,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839556766] [2022-01-31 15:00:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:18,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:00:18,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:00:18,728 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) [2022-01-31 15:00:18,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 15:00:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 15:00:18,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 15:00:18,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 15:00:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-31 15:00:19,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 15:00:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 15:00:20,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 15:00:20,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262813820] [2022-01-31 15:00:20,473 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 15:00:20,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839556766] [2022-01-31 15:00:20,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839556766] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 15:00:20,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 15:00:20,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-01-31 15:00:20,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11033739] [2022-01-31 15:00:20,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 15:00:20,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 15:00:20,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 15:00:20,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 15:00:20,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-31 15:00:20,474 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 15:00:21,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 15:00:21,162 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-01-31 15:00:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 15:00:21,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-01-31 15:00:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 15:00:21,164 INFO L225 Difference]: With dead ends: 88 [2022-01-31 15:00:21,164 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 15:00:21,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-31 15:00:21,165 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 15:00:21,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 162 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 15:00:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 15:00:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-01-31 15:00:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 46 states have (on average 1.173913043478261) internal successors, (54), 49 states have internal predecessors, (54), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 15:00:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-01-31 15:00:21,172 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 56 [2022-01-31 15:00:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 15:00:21,172 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-01-31 15:00:21,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-31 15:00:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-01-31 15:00:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 15:00:21,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 15:00:21,173 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 15:00:21,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 15:00:21,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:00:21,374 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 15:00:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 15:00:21,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2022-01-31 15:00:21,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 15:00:21,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487042982] [2022-01-31 15:00:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:21,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 15:00:21,380 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 15:00:21,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464352890] [2022-01-31 15:00:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 15:00:21,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 15:00:21,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 15:00:21,381 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) [2022-01-31 15:00:21,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process