/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/cohencu-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 17:23:23,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 17:23:23,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 17:23:23,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 17:23:23,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 17:23:23,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 17:23:23,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 17:23:23,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 17:23:23,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 17:23:23,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 17:23:23,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 17:23:23,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 17:23:23,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 17:23:23,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 17:23:23,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 17:23:23,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 17:23:23,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 17:23:23,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 17:23:23,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 17:23:23,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 17:23:23,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 17:23:23,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 17:23:23,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 17:23:23,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 17:23:24,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 17:23:24,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 17:23:24,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 17:23:24,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 17:23:24,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 17:23:24,026 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 17:23:24,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 17:23:24,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 17:23:24,028 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 17:23:24,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 17:23:24,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 17:23:24,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 17:23:24,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 17:23:24,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 17:23:24,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 17:23:24,030 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 17:23:24,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 17:23:24,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 17:23:24,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 17:23:24,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 17:23:24,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 17:23:24,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 17:23:24,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 17:23:24,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:23:24,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 17:23:24,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 17:23:24,032 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 17:23:24,033 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 17:23:24,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 17:23:24,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 17:23:24,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 17:23:24,304 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 17:23:24,305 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 17:23:24,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2022-02-23 17:23:24,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4f3f023/7e451a088ab144cfa528c8df573a1cb8/FLAGb3334453e [2022-02-23 17:23:24,718 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 17:23:24,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2022-02-23 17:23:24,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4f3f023/7e451a088ab144cfa528c8df573a1cb8/FLAGb3334453e [2022-02-23 17:23:24,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4f3f023/7e451a088ab144cfa528c8df573a1cb8 [2022-02-23 17:23:24,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 17:23:24,749 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 17:23:24,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 17:23:24,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 17:23:24,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 17:23:24,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:23:24" (1/1) ... [2022-02-23 17:23:24,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4024b2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:24, skipping insertion in model container [2022-02-23 17:23:24,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:23:24" (1/1) ... [2022-02-23 17:23:24,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 17:23:24,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 17:23:24,968 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/cohencu-ll_valuebound50.c[588,601] [2022-02-23 17:23:24,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:23:25,001 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 17:23:25,013 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/cohencu-ll_valuebound50.c[588,601] [2022-02-23 17:23:25,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:23:25,039 INFO L208 MainTranslator]: Completed translation [2022-02-23 17:23:25,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:25 WrapperNode [2022-02-23 17:23:25,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 17:23:25,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 17:23:25,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 17:23:25,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 17:23:25,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:25" (1/1) ... [2022-02-23 17:23:25,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:25" (1/1) ... [2022-02-23 17:23:25,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:25" (1/1) ... [2022-02-23 17:23:25,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:25" (1/1) ... [2022-02-23 17:23:25,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:25" (1/1) ... [2022-02-23 17:23:25,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:25" (1/1) ... [2022-02-23 17:23:25,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:25" (1/1) ... [2022-02-23 17:23:25,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 17:23:25,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 17:23:25,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 17:23:25,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 17:23:25,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:25" (1/1) ... [2022-02-23 17:23:25,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:23:25,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:25,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 17:23:25,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 17:23:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 17:23:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 17:23:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 17:23:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 17:23:25,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 17:23:25,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 17:23:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 17:23:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 17:23:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 17:23:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 17:23:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-02-23 17:23:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 17:23:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 17:23:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 17:23:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 17:23:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 17:23:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 17:23:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 17:23:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 17:23:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 17:23:25,183 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 17:23:25,184 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 17:23:25,343 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 17:23:25,348 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 17:23:25,348 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 17:23:25,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:23:25 BoogieIcfgContainer [2022-02-23 17:23:25,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 17:23:25,351 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 17:23:25,351 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 17:23:25,351 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 17:23:25,366 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:23:25" (1/1) ... [2022-02-23 17:23:25,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:23:25 BasicIcfg [2022-02-23 17:23:25,397 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 17:23:25,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 17:23:25,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 17:23:25,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 17:23:25,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:23:24" (1/4) ... [2022-02-23 17:23:25,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59682d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:23:25, skipping insertion in model container [2022-02-23 17:23:25,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:25" (2/4) ... [2022-02-23 17:23:25,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59682d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:23:25, skipping insertion in model container [2022-02-23 17:23:25,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:23:25" (3/4) ... [2022-02-23 17:23:25,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59682d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:23:25, skipping insertion in model container [2022-02-23 17:23:25,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:23:25" (4/4) ... [2022-02-23 17:23:25,403 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.cJordan [2022-02-23 17:23:25,407 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 17:23:25,407 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 17:23:25,472 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 17:23:25,491 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 17:23:25,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 17:23:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 17:23:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 17:23:25,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:25,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:25,515 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:25,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2022-02-23 17:23:25,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:25,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274353225] [2022-02-23 17:23:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:25,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:25,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 17:23:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:25,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 17:23:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 17:23:25,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:25,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274353225] [2022-02-23 17:23:25,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274353225] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:25,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:25,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 17:23:25,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057298844] [2022-02-23 17:23:25,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:25,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 17:23:25,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 17:23:25,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:23:25,704 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 17:23:25,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:25,776 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-02-23 17:23:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 17:23:25,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-23 17:23:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:25,784 INFO L225 Difference]: With dead ends: 36 [2022-02-23 17:23:25,784 INFO L226 Difference]: Without dead ends: 31 [2022-02-23 17:23:25,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:23:25,788 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:25,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-23 17:23:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-23 17:23:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 17:23:25,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-02-23 17:23:25,824 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-02-23 17:23:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:25,825 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-02-23 17:23:25,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 17:23:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-02-23 17:23:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 17:23:25,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:25,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:25,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 17:23:25,827 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:25,828 INFO L85 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2022-02-23 17:23:25,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:25,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121735079] [2022-02-23 17:23:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:25,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:25,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 17:23:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:26,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 17:23:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 17:23:26,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:26,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121735079] [2022-02-23 17:23:26,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121735079] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:26,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:26,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 17:23:26,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015261007] [2022-02-23 17:23:26,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:26,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 17:23:26,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:26,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 17:23:26,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 17:23:26,014 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 17:23:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:26,177 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-02-23 17:23:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 17:23:26,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-23 17:23:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:26,179 INFO L225 Difference]: With dead ends: 35 [2022-02-23 17:23:26,179 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 17:23:26,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 17:23:26,181 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:26,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 17:23:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 17:23:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 17:23:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-02-23 17:23:26,194 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-02-23 17:23:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:26,195 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-02-23 17:23:26,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 17:23:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-02-23 17:23:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 17:23:26,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:26,196 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:26,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 17:23:26,197 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:26,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:26,197 INFO L85 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2022-02-23 17:23:26,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:26,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105614366] [2022-02-23 17:23:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:26,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:26,223 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:26,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372895798] [2022-02-23 17:23:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:26,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:26,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:26,226 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) [2022-02-23 17:23:26,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 17:23:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:26,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 17:23:26,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 17:23:26,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:23:26,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:26,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105614366] [2022-02-23 17:23:26,389 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:26,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372895798] [2022-02-23 17:23:26,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372895798] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:26,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:26,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:23:26,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647718990] [2022-02-23 17:23:26,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:26,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:23:26,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:26,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:23:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:23:26,391 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:23:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:26,428 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-02-23 17:23:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:23:26,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-23 17:23:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:26,429 INFO L225 Difference]: With dead ends: 52 [2022-02-23 17:23:26,430 INFO L226 Difference]: Without dead ends: 52 [2022-02-23 17:23:26,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 17:23:26,431 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:26,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 168 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:23:26,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-23 17:23:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-02-23 17:23:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 17:23:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-02-23 17:23:26,438 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-02-23 17:23:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:26,439 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-02-23 17:23:26,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:23:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-02-23 17:23:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 17:23:26,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:26,439 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:26,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 17:23:26,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:26,653 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2022-02-23 17:23:26,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:26,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122604203] [2022-02-23 17:23:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:26,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:26,664 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:26,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749933684] [2022-02-23 17:23:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:26,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:26,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:26,666 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:23:26,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 17:23:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 17:23:26,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:23:26,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:23:26,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:26,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122604203] [2022-02-23 17:23:26,827 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:26,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749933684] [2022-02-23 17:23:26,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749933684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:26,827 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:26,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:23:26,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759217765] [2022-02-23 17:23:26,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:26,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:23:26,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:26,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:23:26,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:23:26,829 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 17:23:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:26,866 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-02-23 17:23:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:23:26,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-02-23 17:23:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:26,868 INFO L225 Difference]: With dead ends: 56 [2022-02-23 17:23:26,868 INFO L226 Difference]: Without dead ends: 56 [2022-02-23 17:23:26,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 17:23:26,869 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:26,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 165 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:23:26,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-23 17:23:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-02-23 17:23:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 17:23:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-02-23 17:23:26,876 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-02-23 17:23:26,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:26,877 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-02-23 17:23:26,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 17:23:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-02-23 17:23:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 17:23:26,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:26,878 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:26,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 17:23:27,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-23 17:23:27,100 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:27,100 INFO L85 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2022-02-23 17:23:27,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:27,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815357297] [2022-02-23 17:23:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:27,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:27,110 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:27,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219819810] [2022-02-23 17:23:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:27,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:27,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:27,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:23:27,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 17:23:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:27,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 17:23:27,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 17:23:27,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:23:27,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:27,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815357297] [2022-02-23 17:23:27,254 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:27,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219819810] [2022-02-23 17:23:27,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219819810] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:27,254 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:27,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:23:27,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698758495] [2022-02-23 17:23:27,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:27,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:23:27,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:23:27,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:23:27,256 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-02-23 17:23:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:27,314 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2022-02-23 17:23:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:23:27,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 32 [2022-02-23 17:23:27,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:27,316 INFO L225 Difference]: With dead ends: 64 [2022-02-23 17:23:27,316 INFO L226 Difference]: Without dead ends: 54 [2022-02-23 17:23:27,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 17:23:27,317 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:27,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:23:27,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-23 17:23:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-23 17:23:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 17:23:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-02-23 17:23:27,323 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-02-23 17:23:27,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:27,323 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-02-23 17:23:27,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-02-23 17:23:27,323 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-02-23 17:23:27,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-23 17:23:27,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:27,324 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-02-23 17:23:27,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 17:23:27,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:27,539 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:27,540 INFO L85 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2022-02-23 17:23:27,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:27,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277558516] [2022-02-23 17:23:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:27,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:27,550 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:27,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840627548] [2022-02-23 17:23:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:27,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:27,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:27,552 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:23:27,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 17:23:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:27,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 17:23:27,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 17:23:27,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 17:23:27,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:27,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277558516] [2022-02-23 17:23:27,942 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:27,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840627548] [2022-02-23 17:23:27,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840627548] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:23:27,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:23:27,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-23 17:23:27,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182481300] [2022-02-23 17:23:27,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:27,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 17:23:27,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 17:23:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:23:27,944 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 17:23:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:28,195 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-02-23 17:23:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 17:23:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-02-23 17:23:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:28,197 INFO L225 Difference]: With dead ends: 75 [2022-02-23 17:23:28,197 INFO L226 Difference]: Without dead ends: 75 [2022-02-23 17:23:28,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:23:28,198 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:28,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 208 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 17:23:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-23 17:23:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2022-02-23 17:23:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 17:23:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-02-23 17:23:28,205 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 49 [2022-02-23 17:23:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:28,205 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-02-23 17:23:28,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 17:23:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-02-23 17:23:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-23 17:23:28,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:28,206 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-02-23 17:23:28,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 17:23:28,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:28,419 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:28,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:28,420 INFO L85 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2022-02-23 17:23:28,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:28,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179463719] [2022-02-23 17:23:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:28,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:28,440 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:28,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176743300] [2022-02-23 17:23:28,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 17:23:28,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:28,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:28,442 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:23:28,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 17:23:28,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 17:23:28,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:23:28,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 17:23:28,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 17:23:28,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 17:23:28,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:28,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179463719] [2022-02-23 17:23:28,786 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:28,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176743300] [2022-02-23 17:23:28,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176743300] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:23:28,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:23:28,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-23 17:23:28,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379709661] [2022-02-23 17:23:28,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:28,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 17:23:28,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 17:23:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:23:28,790 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-23 17:23:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:28,877 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-02-23 17:23:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 17:23:28,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 54 [2022-02-23 17:23:28,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:28,878 INFO L225 Difference]: With dead ends: 79 [2022-02-23 17:23:28,879 INFO L226 Difference]: Without dead ends: 79 [2022-02-23 17:23:28,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-23 17:23:28,880 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:28,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 240 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-23 17:23:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-02-23 17:23:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-23 17:23:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-02-23 17:23:28,895 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 54 [2022-02-23 17:23:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:28,895 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-02-23 17:23:28,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-23 17:23:28,896 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-02-23 17:23:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-23 17:23:28,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:28,901 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-02-23 17:23:28,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 17:23:29,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:29,116 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:29,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2022-02-23 17:23:29,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:29,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540949701] [2022-02-23 17:23:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:29,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:29,133 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:29,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478078925] [2022-02-23 17:23:29,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 17:23:29,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:29,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:29,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:23:29,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 17:23:29,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-23 17:23:29,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:23:29,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 17:23:29,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-23 17:23:29,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-23 17:23:29,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:29,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540949701] [2022-02-23 17:23:29,643 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:29,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478078925] [2022-02-23 17:23:29,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478078925] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:23:29,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:23:29,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-23 17:23:29,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914422748] [2022-02-23 17:23:29,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:29,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 17:23:29,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 17:23:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:23:29,645 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-23 17:23:29,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:29,866 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-02-23 17:23:29,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 17:23:29,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 59 [2022-02-23 17:23:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:29,868 INFO L225 Difference]: With dead ends: 91 [2022-02-23 17:23:29,868 INFO L226 Difference]: Without dead ends: 85 [2022-02-23 17:23:29,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-23 17:23:29,868 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:29,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 212 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 17:23:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-23 17:23:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-02-23 17:23:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 48 states have internal predecessors, (48), 19 states have call successors, (19), 14 states have call predecessors, (19), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 17:23:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-02-23 17:23:29,874 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 59 [2022-02-23 17:23:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:29,874 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-02-23 17:23:29,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-23 17:23:29,875 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-02-23 17:23:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-23 17:23:29,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:29,875 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2022-02-23 17:23:29,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 17:23:30,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:30,083 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2022-02-23 17:23:30,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:30,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998752161] [2022-02-23 17:23:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:30,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:30,093 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:30,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039085810] [2022-02-23 17:23:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:30,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:30,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:30,094 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:23:30,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 17:23:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:30,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 17:23:30,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-23 17:23:30,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:30,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:30,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998752161] [2022-02-23 17:23:30,655 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:30,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039085810] [2022-02-23 17:23:30,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039085810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 17:23:30,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 17:23:30,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-23 17:23:30,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761995798] [2022-02-23 17:23:30,655 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:30,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 17:23:30,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:30,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 17:23:30,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-23 17:23:30,658 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 17:23:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:30,769 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-02-23 17:23:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 17:23:30,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-02-23 17:23:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:30,770 INFO L225 Difference]: With dead ends: 93 [2022-02-23 17:23:30,770 INFO L226 Difference]: Without dead ends: 93 [2022-02-23 17:23:30,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-23 17:23:30,771 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:30,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 216 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-23 17:23:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-02-23 17:23:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 55 states have internal predecessors, (56), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 17:23:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-02-23 17:23:30,777 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 75 [2022-02-23 17:23:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:30,778 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-02-23 17:23:30,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 17:23:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-02-23 17:23:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-23 17:23:30,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:30,779 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2022-02-23 17:23:30,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 17:23:30,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:30,995 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2022-02-23 17:23:30,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:30,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329489545] [2022-02-23 17:23:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:30,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:31,005 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:31,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472149543] [2022-02-23 17:23:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:31,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:31,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:31,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:23:31,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 17:23:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:31,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-23 17:23:31,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 79 proven. 12 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-02-23 17:23:31,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:41,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:41,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329489545] [2022-02-23 17:23:41,399 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:41,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472149543] [2022-02-23 17:23:41,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472149543] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 17:23:41,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 17:23:41,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-02-23 17:23:41,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654345635] [2022-02-23 17:23:41,399 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:41,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 17:23:41,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 17:23:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-23 17:23:41,401 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 17:23:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:42,756 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-02-23 17:23:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 17:23:42,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 80 [2022-02-23 17:23:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:42,757 INFO L225 Difference]: With dead ends: 101 [2022-02-23 17:23:42,757 INFO L226 Difference]: Without dead ends: 90 [2022-02-23 17:23:42,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-02-23 17:23:42,758 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:42,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 205 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 17:23:42,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-23 17:23:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-02-23 17:23:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 21 states have call successors, (21), 16 states have call predecessors, (21), 15 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 17:23:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-02-23 17:23:42,764 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 80 [2022-02-23 17:23:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:42,764 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-02-23 17:23:42,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 17:23:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-02-23 17:23:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-23 17:23:42,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:42,765 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2022-02-23 17:23:42,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 17:23:42,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 17:23:42,980 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 4 times [2022-02-23 17:23:42,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:42,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599123963] [2022-02-23 17:23:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:42,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:42,995 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:42,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828131145] [2022-02-23 17:23:42,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 17:23:42,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:42,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:43,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:23:43,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 17:23:43,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 17:23:43,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:23:43,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-23 17:23:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-23 17:23:43,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-23 17:23:43,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:43,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599123963] [2022-02-23 17:23:43,496 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:43,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828131145] [2022-02-23 17:23:43,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828131145] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:23:43,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:23:43,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-23 17:23:43,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163453869] [2022-02-23 17:23:43,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:43,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 17:23:43,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 17:23:43,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-23 17:23:43,498 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-02-23 17:23:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:43,730 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2022-02-23 17:23:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 17:23:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 81 [2022-02-23 17:23:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:43,732 INFO L225 Difference]: With dead ends: 104 [2022-02-23 17:23:43,732 INFO L226 Difference]: Without dead ends: 104 [2022-02-23 17:23:43,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-23 17:23:43,733 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:43,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 195 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 17:23:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-23 17:23:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-02-23 17:23:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 17:23:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-02-23 17:23:43,738 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2022-02-23 17:23:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:43,738 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-02-23 17:23:43,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-02-23 17:23:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-02-23 17:23:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-23 17:23:43,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:43,739 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:43,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-23 17:23:43,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:43,953 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:43,953 INFO L85 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2022-02-23 17:23:43,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:43,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142978211] [2022-02-23 17:23:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:43,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:43,961 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:43,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440077050] [2022-02-23 17:23:43,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 17:23:43,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:43,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:43,963 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:23:43,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 17:23:44,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 17:23:44,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:23:44,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-23 17:23:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-23 17:23:44,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:44,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:44,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142978211] [2022-02-23 17:23:44,586 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:44,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440077050] [2022-02-23 17:23:44,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440077050] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 17:23:44,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 17:23:44,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-02-23 17:23:44,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727370853] [2022-02-23 17:23:44,586 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:44,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 17:23:44,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 17:23:44,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:23:44,587 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-23 17:23:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:44,704 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2022-02-23 17:23:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 17:23:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2022-02-23 17:23:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:44,706 INFO L225 Difference]: With dead ends: 116 [2022-02-23 17:23:44,706 INFO L226 Difference]: Without dead ends: 116 [2022-02-23 17:23:44,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-23 17:23:44,707 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:44,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 290 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-23 17:23:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-02-23 17:23:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-23 17:23:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2022-02-23 17:23:44,712 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 102 [2022-02-23 17:23:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:44,712 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2022-02-23 17:23:44,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-23 17:23:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2022-02-23 17:23:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-23 17:23:44,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:44,713 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:44,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 17:23:44,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 17:23:44,914 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:44,914 INFO L85 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2022-02-23 17:23:44,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:44,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54560353] [2022-02-23 17:23:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:44,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:44,922 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:44,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824733193] [2022-02-23 17:23:44,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 17:23:44,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:44,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:44,925 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) [2022-02-23 17:23:44,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 17:23:44,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 17:23:44,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:23:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-23 17:23:44,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-02-23 17:23:45,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:45,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:45,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54560353] [2022-02-23 17:23:45,480 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:45,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824733193] [2022-02-23 17:23:45,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824733193] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 17:23:45,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 17:23:45,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-02-23 17:23:45,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807695513] [2022-02-23 17:23:45,480 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:45,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 17:23:45,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 17:23:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:23:45,481 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-02-23 17:23:45,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:45,594 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-02-23 17:23:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 17:23:45,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2022-02-23 17:23:45,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:45,596 INFO L225 Difference]: With dead ends: 124 [2022-02-23 17:23:45,596 INFO L226 Difference]: Without dead ends: 113 [2022-02-23 17:23:45,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-23 17:23:45,597 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:45,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 299 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:45,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-23 17:23:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-02-23 17:23:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 26 states have call successors, (26), 20 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-23 17:23:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2022-02-23 17:23:45,601 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 107 [2022-02-23 17:23:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:45,602 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2022-02-23 17:23:45,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-02-23 17:23:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2022-02-23 17:23:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-23 17:23:45,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:45,603 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:45,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 17:23:45,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 17:23:45,815 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:45,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:45,816 INFO L85 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2022-02-23 17:23:45,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:45,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291616668] [2022-02-23 17:23:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:45,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:45,830 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:45,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058432944] [2022-02-23 17:23:45,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 17:23:45,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:45,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:45,835 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) [2022-02-23 17:23:45,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 17:23:46,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 17:23:46,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:23:46,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 17:23:46,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-02-23 17:23:46,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:48,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:48,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291616668] [2022-02-23 17:23:48,682 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:48,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058432944] [2022-02-23 17:23:48,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058432944] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 17:23:48,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 17:23:48,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-02-23 17:23:48,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556939946] [2022-02-23 17:23:48,682 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:48,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 17:23:48,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:48,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 17:23:48,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2022-02-23 17:23:48,683 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-23 17:23:50,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:23:50,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:50,413 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-02-23 17:23:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 17:23:50,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 129 [2022-02-23 17:23:50,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:50,414 INFO L225 Difference]: With dead ends: 117 [2022-02-23 17:23:50,414 INFO L226 Difference]: Without dead ends: 115 [2022-02-23 17:23:50,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=50, Invalid=221, Unknown=1, NotChecked=0, Total=272 [2022-02-23 17:23:50,415 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:50,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 187 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-23 17:23:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-23 17:23:50,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-02-23 17:23:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 26 states have call successors, (26), 21 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-23 17:23:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2022-02-23 17:23:50,419 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 129 [2022-02-23 17:23:50,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:50,420 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2022-02-23 17:23:50,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-23 17:23:50,420 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2022-02-23 17:23:50,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-23 17:23:50,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:50,421 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:50,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 17:23:50,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 17:23:50,627 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2022-02-23 17:23:50,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:50,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687338274] [2022-02-23 17:23:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:50,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:50,647 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:50,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583489971] [2022-02-23 17:23:50,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 17:23:50,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:50,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:50,649 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) [2022-02-23 17:23:50,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 17:23:51,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 17:23:51,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:23:51,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-23 17:23:51,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:24:22,292 WARN L232 SmtUtils]: Spent 5.35s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 17:24:43,450 WARN L232 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 46 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 17:24:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 259 proven. 76 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-02-23 17:24:43,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:24:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 204 proven. 34 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-02-23 17:24:45,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:24:45,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687338274] [2022-02-23 17:24:45,668 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:24:45,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583489971] [2022-02-23 17:24:45,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583489971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:24:45,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:24:45,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-02-23 17:24:45,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553379550] [2022-02-23 17:24:45,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:24:45,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-23 17:24:45,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:24:45,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-23 17:24:45,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=370, Unknown=1, NotChecked=0, Total=462 [2022-02-23 17:24:45,670 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-02-23 17:24:53,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:25:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:25:03,205 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2022-02-23 17:25:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 17:25:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 134 [2022-02-23 17:25:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:25:03,206 INFO L225 Difference]: With dead ends: 117 [2022-02-23 17:25:03,206 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 17:25:03,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=165, Invalid=646, Unknown=1, NotChecked=0, Total=812 [2022-02-23 17:25:03,207 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-23 17:25:03,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 151 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-02-23 17:25:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 17:25:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 17:25:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 17:25:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 17:25:03,208 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 134 [2022-02-23 17:25:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:25:03,208 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 17:25:03,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-02-23 17:25:03,208 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 17:25:03,208 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 17:25:03,210 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 17:25:03,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 17:25:03,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-23 17:25:03,422 INFO L732 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1] [2022-02-23 17:25:03,423 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 17:25:03,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:25:03 BasicIcfg [2022-02-23 17:25:03,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 17:25:03,426 INFO L158 Benchmark]: Toolchain (without parser) took 98677.28ms. Allocated memory was 195.0MB in the beginning and 327.2MB in the end (delta: 132.1MB). Free memory was 139.2MB in the beginning and 273.2MB in the end (delta: -134.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 17:25:03,426 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 195.0MB. Free memory is still 156.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 17:25:03,426 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.65ms. Allocated memory was 195.0MB in the beginning and 272.6MB in the end (delta: 77.6MB). Free memory was 139.0MB in the beginning and 242.4MB in the end (delta: -103.4MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. [2022-02-23 17:25:03,426 INFO L158 Benchmark]: Boogie Preprocessor took 32.69ms. Allocated memory is still 272.6MB. Free memory was 242.4MB in the beginning and 241.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 17:25:03,427 INFO L158 Benchmark]: RCFGBuilder took 275.89ms. Allocated memory is still 272.6MB. Free memory was 240.8MB in the beginning and 230.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-23 17:25:03,427 INFO L158 Benchmark]: IcfgTransformer took 46.70ms. Allocated memory is still 272.6MB. Free memory was 230.4MB in the beginning and 229.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 17:25:03,427 INFO L158 Benchmark]: TraceAbstraction took 98026.97ms. Allocated memory was 272.6MB in the beginning and 327.2MB in the end (delta: 54.5MB). Free memory was 228.5MB in the beginning and 273.2MB in the end (delta: -44.7MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. [2022-02-23 17:25:03,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 195.0MB. Free memory is still 156.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 287.65ms. Allocated memory was 195.0MB in the beginning and 272.6MB in the end (delta: 77.6MB). Free memory was 139.0MB in the beginning and 242.4MB in the end (delta: -103.4MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.69ms. Allocated memory is still 272.6MB. Free memory was 242.4MB in the beginning and 241.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 275.89ms. Allocated memory is still 272.6MB. Free memory was 240.8MB in the beginning and 230.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 46.70ms. Allocated memory is still 272.6MB. Free memory was 230.4MB in the beginning and 229.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 98026.97ms. Allocated memory was 272.6MB in the beginning and 327.2MB in the end (delta: 54.5MB). Free memory was 228.5MB in the beginning and 273.2MB in the end (delta: -44.7MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 98.0s, OverallIterations: 15, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 22.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 239 SdHoareTripleChecker+Valid, 7.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 175 mSDsluCounter, 2773 SdHoareTripleChecker+Invalid, 7.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2171 mSDsCounter, 382 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1659 IncrementalHoareTripleChecker+Invalid, 2042 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 382 mSolverCounterUnsat, 602 mSDtfsCounter, 1659 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1536 GetRequests, 1372 SyntacticMatches, 10 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 47.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=12, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 54 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 70.8s InterpolantComputationTime, 985 NumberOfCodeBlocks, 796 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1342 ConstructedInterpolants, 0 QuantifiedInterpolants, 5862 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1921 ConjunctsInSsa, 259 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 5633/5874 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-23 17:25:03,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...