/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 06:30:35,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 06:30:35,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 06:30:35,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 06:30:35,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 06:30:35,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 06:30:35,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 06:30:35,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 06:30:35,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 06:30:35,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 06:30:35,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 06:30:35,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 06:30:35,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 06:30:35,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 06:30:35,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 06:30:35,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 06:30:35,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 06:30:35,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 06:30:35,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 06:30:35,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 06:30:35,989 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 06:30:35,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 06:30:35,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 06:30:35,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 06:30:35,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 06:30:35,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 06:30:35,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 06:30:35,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 06:30:35,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 06:30:35,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 06:30:36,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 06:30:36,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 06:30:36,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 06:30:36,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 06:30:36,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 06:30:36,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 06:30:36,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 06:30:36,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 06:30:36,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 06:30:36,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 06:30:36,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 06:30:36,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 06:30:36,007 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 06:30:36,014 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 06:30:36,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 06:30:36,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 06:30:36,015 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 06:30:36,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 06:30:36,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 06:30:36,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 06:30:36,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 06:30:36,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 06:30:36,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 06:30:36,016 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 06:30:36,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 06:30:36,016 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 06:30:36,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 06:30:36,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 06:30:36,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 06:30:36,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 06:30:36,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 06:30:36,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:30:36,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 06:30:36,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 06:30:36,018 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 06:30:36,018 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 06:30:36,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 06:30:36,018 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 06:30:36,018 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 06:30:36,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 06:30:36,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 06:30:36,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 06:30:36,238 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 06:30:36,243 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 06:30:36,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound100.c [2022-03-19 06:30:36,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e59454a1/a36379886d3e45bdbcaa2fe4a4223ade/FLAG698f5db29 [2022-03-19 06:30:36,679 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 06:30:36,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound100.c [2022-03-19 06:30:36,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e59454a1/a36379886d3e45bdbcaa2fe4a4223ade/FLAG698f5db29 [2022-03-19 06:30:37,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e59454a1/a36379886d3e45bdbcaa2fe4a4223ade [2022-03-19 06:30:37,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 06:30:37,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 06:30:37,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 06:30:37,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 06:30:37,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 06:30:37,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:30:37" (1/1) ... [2022-03-19 06:30:37,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6739e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:37, skipping insertion in model container [2022-03-19 06:30:37,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 06:30:37" (1/1) ... [2022-03-19 06:30:37,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 06:30:37,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 06:30:37,250 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/ps6-ll_unwindbound100.c[458,471] [2022-03-19 06:30:37,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:30:37,291 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 06:30:37,300 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/ps6-ll_unwindbound100.c[458,471] [2022-03-19 06:30:37,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 06:30:37,320 INFO L208 MainTranslator]: Completed translation [2022-03-19 06:30:37,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:37 WrapperNode [2022-03-19 06:30:37,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 06:30:37,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 06:30:37,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 06:30:37,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 06:30:37,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:37" (1/1) ... [2022-03-19 06:30:37,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:37" (1/1) ... [2022-03-19 06:30:37,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:37" (1/1) ... [2022-03-19 06:30:37,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:37" (1/1) ... [2022-03-19 06:30:37,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:37" (1/1) ... [2022-03-19 06:30:37,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:37" (1/1) ... [2022-03-19 06:30:37,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:37" (1/1) ... [2022-03-19 06:30:37,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 06:30:37,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 06:30:37,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 06:30:37,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 06:30:37,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:37" (1/1) ... [2022-03-19 06:30:37,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 06:30:37,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:37,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 06:30:37,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 06:30:37,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 06:30:37,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 06:30:37,442 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 06:30:37,442 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 06:30:37,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 06:30:37,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 06:30:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 06:30:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 06:30:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 06:30:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 06:30:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-19 06:30:37,444 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 06:30:37,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 06:30:37,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 06:30:37,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 06:30:37,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 06:30:37,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 06:30:37,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 06:30:37,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 06:30:37,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 06:30:37,499 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 06:30:37,500 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 06:30:37,594 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 06:30:37,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 06:30:37,599 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 06:30:37,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:30:37 BoogieIcfgContainer [2022-03-19 06:30:37,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 06:30:37,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 06:30:37,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 06:30:37,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 06:30:37,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 06:30:37" (1/3) ... [2022-03-19 06:30:37,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa2721f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:30:37, skipping insertion in model container [2022-03-19 06:30:37,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 06:30:37" (2/3) ... [2022-03-19 06:30:37,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa2721f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 06:30:37, skipping insertion in model container [2022-03-19 06:30:37,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 06:30:37" (3/3) ... [2022-03-19 06:30:37,608 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound100.c [2022-03-19 06:30:37,612 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 06:30:37,612 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 06:30:37,664 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 06:30:37,687 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 06:30:37,687 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 06:30:37,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:30:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 06:30:37,723 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:37,723 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:37,724 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:37,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:37,728 INFO L85 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 1 times [2022-03-19 06:30:37,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:37,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1256431722] [2022-03-19 06:30:37,763 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:30:37,763 INFO L85 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 2 times [2022-03-19 06:30:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:37,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876552839] [2022-03-19 06:30:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:37,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:30:37,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 06:30:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:30:37,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 06:30:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 06:30:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:30:38,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:38,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876552839] [2022-03-19 06:30:38,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876552839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:38,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:38,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 06:30:38,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:38,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1256431722] [2022-03-19 06:30:38,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1256431722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:38,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:38,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 06:30:38,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873659222] [2022-03-19 06:30:38,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:38,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 06:30:38,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 06:30:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 06:30:38,051 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:30:38,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:38,160 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-19 06:30:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 06:30:38,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-19 06:30:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:38,174 INFO L225 Difference]: With dead ends: 50 [2022-03-19 06:30:38,174 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 06:30:38,177 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 06:30:38,183 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:38,184 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:30:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 06:30:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-19 06:30:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 06:30:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-19 06:30:38,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-03-19 06:30:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:38,231 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-19 06:30:38,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:30:38,231 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-19 06:30:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 06:30:38,233 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:38,233 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:38,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 06:30:38,233 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 1 times [2022-03-19 06:30:38,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:38,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1831845864] [2022-03-19 06:30:38,245 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:30:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 2 times [2022-03-19 06:30:38,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:38,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614361061] [2022-03-19 06:30:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:38,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:38,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:38,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813293565] [2022-03-19 06:30:38,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:38,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:38,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:38,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:38,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 06:30:38,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 06:30:38,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:38,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 06:30:38,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:30:38,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 06:30:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:38,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614361061] [2022-03-19 06:30:38,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:38,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813293565] [2022-03-19 06:30:38,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813293565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:38,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:38,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 06:30:38,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1831845864] [2022-03-19 06:30:38,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1831845864] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:38,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:38,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 06:30:38,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461972752] [2022-03-19 06:30:38,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:38,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 06:30:38,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:38,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 06:30:38,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 06:30:38,481 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 06:30:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:38,508 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-19 06:30:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 06:30:38,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-19 06:30:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:38,510 INFO L225 Difference]: With dead ends: 34 [2022-03-19 06:30:38,510 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 06:30:38,511 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 06:30:38,512 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:38,516 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 06:30:38,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-19 06:30:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 06:30:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-03-19 06:30:38,531 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-03-19 06:30:38,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:38,532 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-03-19 06:30:38,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 06:30:38,532 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-03-19 06:30:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 06:30:38,533 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:38,534 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:38,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:38,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:38,760 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 1 times [2022-03-19 06:30:38,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:38,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1673346743] [2022-03-19 06:30:38,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 06:30:38,761 INFO L85 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 2 times [2022-03-19 06:30:38,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:38,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82989493] [2022-03-19 06:30:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:38,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:38,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:38,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170058539] [2022-03-19 06:30:38,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:38,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:38,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:38,779 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:38,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 06:30:38,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 06:30:38,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:38,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 06:30:38,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:30:38,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 06:30:38,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:38,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82989493] [2022-03-19 06:30:38,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:38,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170058539] [2022-03-19 06:30:38,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170058539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:38,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:38,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:30:38,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:38,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1673346743] [2022-03-19 06:30:38,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1673346743] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:38,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:38,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:30:38,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940784910] [2022-03-19 06:30:38,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:38,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:30:38,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:38,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:30:38,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 06:30:38,899 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:30:39,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:39,082 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-03-19 06:30:39,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 06:30:39,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-19 06:30:39,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:39,084 INFO L225 Difference]: With dead ends: 36 [2022-03-19 06:30:39,084 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 06:30:39,084 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 06:30:39,086 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:39,087 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:30:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 06:30:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 06:30:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:30:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-19 06:30:39,095 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-03-19 06:30:39,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:39,096 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-19 06:30:39,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 06:30:39,096 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-19 06:30:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 06:30:39,097 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:39,097 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:39,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 06:30:39,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 06:30:39,312 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:39,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1364840471, now seen corresponding path program 1 times [2022-03-19 06:30:39,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:39,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1887777568] [2022-03-19 06:30:39,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:39,337 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:39,337 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:39,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1364840471, now seen corresponding path program 2 times [2022-03-19 06:30:39,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:39,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322323333] [2022-03-19 06:30:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:39,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:39,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:39,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123606556] [2022-03-19 06:30:39,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:39,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:39,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:39,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:39,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 06:30:39,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:39,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:39,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 06:30:39,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:30:39,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:30:39,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:39,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322323333] [2022-03-19 06:30:39,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:39,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123606556] [2022-03-19 06:30:39,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123606556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:39,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:39,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 06:30:39,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:39,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1887777568] [2022-03-19 06:30:39,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1887777568] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:39,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:39,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:30:39,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860037254] [2022-03-19 06:30:39,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:39,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:30:39,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:39,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:30:39,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:30:39,732 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 06:30:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:39,890 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-19 06:30:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 06:30:39,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-03-19 06:30:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:39,892 INFO L225 Difference]: With dead ends: 42 [2022-03-19 06:30:39,892 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 06:30:39,893 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-19 06:30:39,894 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:39,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:30:39,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 06:30:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-19 06:30:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:30:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-19 06:30:39,903 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2022-03-19 06:30:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:39,904 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-19 06:30:39,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 06:30:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-19 06:30:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-19 06:30:39,905 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:39,905 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:39,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:40,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:40,112 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:40,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1363053011, now seen corresponding path program 1 times [2022-03-19 06:30:40,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:40,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1897837023] [2022-03-19 06:30:40,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:40,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:40,122 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:40,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1363053011, now seen corresponding path program 2 times [2022-03-19 06:30:40,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:40,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695663336] [2022-03-19 06:30:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:40,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:40,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:40,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506909708] [2022-03-19 06:30:40,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:40,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:40,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:40,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:40,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 06:30:40,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:40,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:40,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 06:30:40,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 06:30:40,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 06:30:40,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695663336] [2022-03-19 06:30:40,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506909708] [2022-03-19 06:30:40,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506909708] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:40,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:40,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 06:30:40,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:40,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1897837023] [2022-03-19 06:30:40,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1897837023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:40,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:40,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 06:30:40,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786532664] [2022-03-19 06:30:40,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:40,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 06:30:40,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:40,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 06:30:40,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 06:30:40,501 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:30:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:40,539 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-03-19 06:30:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 06:30:40,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 26 [2022-03-19 06:30:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:40,540 INFO L225 Difference]: With dead ends: 40 [2022-03-19 06:30:40,541 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 06:30:40,541 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 06:30:40,542 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:40,542 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 79 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 06:30:40,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-19 06:30:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:30:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-03-19 06:30:40,552 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 26 [2022-03-19 06:30:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:40,553 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-03-19 06:30:40,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 06:30:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-03-19 06:30:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 06:30:40,554 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:40,554 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:40,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:40,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:40,768 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:40,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:40,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1559147673, now seen corresponding path program 1 times [2022-03-19 06:30:40,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:40,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020346267] [2022-03-19 06:30:40,773 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:40,773 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:40,773 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:40,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1559147673, now seen corresponding path program 2 times [2022-03-19 06:30:40,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:40,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525906107] [2022-03-19 06:30:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:40,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:40,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803290850] [2022-03-19 06:30:40,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:40,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:40,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:40,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:40,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 06:30:40,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:40,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:40,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 06:30:40,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 06:30:41,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:41,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:41,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525906107] [2022-03-19 06:30:41,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803290850] [2022-03-19 06:30:41,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803290850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:41,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:41,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-19 06:30:41,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020346267] [2022-03-19 06:30:41,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020346267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:41,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:41,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:30:41,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698907253] [2022-03-19 06:30:41,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:41,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:30:41,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:41,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:30:41,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:30:41,241 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:30:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:41,303 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-03-19 06:30:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 06:30:41,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-19 06:30:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:41,305 INFO L225 Difference]: With dead ends: 44 [2022-03-19 06:30:41,305 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 06:30:41,305 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:30:41,306 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:41,306 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 159 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:41,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 06:30:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 06:30:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:30:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-19 06:30:41,314 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 37 [2022-03-19 06:30:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:41,315 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-19 06:30:41,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 06:30:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-19 06:30:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 06:30:41,316 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:41,316 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:41,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:41,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:41,546 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:41,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:41,546 INFO L85 PathProgramCache]: Analyzing trace with hash -951509150, now seen corresponding path program 1 times [2022-03-19 06:30:41,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:41,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749691348] [2022-03-19 06:30:41,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:41,551 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:41,551 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:41,551 INFO L85 PathProgramCache]: Analyzing trace with hash -951509150, now seen corresponding path program 2 times [2022-03-19 06:30:41,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:41,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113777115] [2022-03-19 06:30:41,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:41,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:41,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:41,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242138264] [2022-03-19 06:30:41,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:41,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:41,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:41,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:41,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 06:30:41,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:41,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:41,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 06:30:41,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:30:41,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 06:30:41,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:41,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113777115] [2022-03-19 06:30:41,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:41,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242138264] [2022-03-19 06:30:41,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242138264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:41,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:41,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 06:30:41,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:41,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1749691348] [2022-03-19 06:30:41,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1749691348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:41,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:41,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 06:30:41,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695214980] [2022-03-19 06:30:41,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:41,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 06:30:41,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 06:30:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 06:30:41,790 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:30:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:41,826 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-03-19 06:30:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:30:41,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 39 [2022-03-19 06:30:41,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:41,828 INFO L225 Difference]: With dead ends: 54 [2022-03-19 06:30:41,829 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 06:30:41,829 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:30:41,830 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:41,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 93 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 06:30:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-19 06:30:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:30:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-19 06:30:41,845 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2022-03-19 06:30:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:41,846 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-19 06:30:41,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 06:30:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-19 06:30:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 06:30:41,850 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:41,851 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:41,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:42,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:42,072 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1537538120, now seen corresponding path program 3 times [2022-03-19 06:30:42,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:42,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [432098997] [2022-03-19 06:30:42,076 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:42,076 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:42,076 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:42,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1537538120, now seen corresponding path program 4 times [2022-03-19 06:30:42,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:42,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666554507] [2022-03-19 06:30:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:42,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:42,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:42,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366985523] [2022-03-19 06:30:42,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:30:42,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:42,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:42,087 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:42,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 06:30:42,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:30:42,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:42,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 06:30:42,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 06:30:42,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:42,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:42,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666554507] [2022-03-19 06:30:42,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:42,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366985523] [2022-03-19 06:30:42,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366985523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:42,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:42,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-19 06:30:42,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:42,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [432098997] [2022-03-19 06:30:42,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [432098997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:42,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:42,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:30:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532293681] [2022-03-19 06:30:42,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:42,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:30:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:30:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 06:30:42,446 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 06:30:42,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:42,521 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-19 06:30:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 06:30:42,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-03-19 06:30:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:42,525 INFO L225 Difference]: With dead ends: 52 [2022-03-19 06:30:42,525 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 06:30:42,526 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-19 06:30:42,526 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:42,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 206 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 06:30:42,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-19 06:30:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:30:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-03-19 06:30:42,546 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 45 [2022-03-19 06:30:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:42,548 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-03-19 06:30:42,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 06:30:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-03-19 06:30:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 06:30:42,550 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:42,550 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:42,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:42,772 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:42,773 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1448798205, now seen corresponding path program 3 times [2022-03-19 06:30:42,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:42,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [512078765] [2022-03-19 06:30:42,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:42,777 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:42,777 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:42,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1448798205, now seen corresponding path program 4 times [2022-03-19 06:30:42,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:42,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443018676] [2022-03-19 06:30:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:42,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:42,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:42,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707535611] [2022-03-19 06:30:42,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:30:42,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:42,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:42,788 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:42,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 06:30:42,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:30:42,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:42,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 06:30:42,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:30:42,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 06:30:43,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:43,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443018676] [2022-03-19 06:30:43,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:43,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707535611] [2022-03-19 06:30:43,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707535611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:43,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:43,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 06:30:43,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:43,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [512078765] [2022-03-19 06:30:43,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [512078765] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:43,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:43,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 06:30:43,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304623668] [2022-03-19 06:30:43,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:43,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 06:30:43,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:43,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 06:30:43,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:30:43,062 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:30:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:43,112 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2022-03-19 06:30:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:30:43,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 47 [2022-03-19 06:30:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:43,115 INFO L225 Difference]: With dead ends: 62 [2022-03-19 06:30:43,115 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 06:30:43,115 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-19 06:30:43,117 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:43,117 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:43,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 06:30:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-19 06:30:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:30:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-03-19 06:30:43,129 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2022-03-19 06:30:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:43,129 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-03-19 06:30:43,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 06:30:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-03-19 06:30:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 06:30:43,130 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:43,130 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:43,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:43,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 06:30:43,354 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:43,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:43,354 INFO L85 PathProgramCache]: Analyzing trace with hash 468857897, now seen corresponding path program 5 times [2022-03-19 06:30:43,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:43,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611772964] [2022-03-19 06:30:43,357 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:43,357 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:43,358 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:43,358 INFO L85 PathProgramCache]: Analyzing trace with hash 468857897, now seen corresponding path program 6 times [2022-03-19 06:30:43,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:43,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387289163] [2022-03-19 06:30:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:43,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:43,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:43,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015891393] [2022-03-19 06:30:43,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:30:43,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:43,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:43,371 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:43,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 06:30:50,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 06:30:50,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:50,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 06:30:50,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 06:30:50,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:50,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:50,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387289163] [2022-03-19 06:30:50,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:50,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015891393] [2022-03-19 06:30:50,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015891393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:50,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:50,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-19 06:30:50,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:50,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [611772964] [2022-03-19 06:30:50,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [611772964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:50,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:50,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:30:50,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046041085] [2022-03-19 06:30:50,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:50,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:30:50,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:50,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:30:50,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 06:30:50,457 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 06:30:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:50,582 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-19 06:30:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 06:30:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 53 [2022-03-19 06:30:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:50,584 INFO L225 Difference]: With dead ends: 60 [2022-03-19 06:30:50,584 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 06:30:50,584 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:30:50,584 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:50,585 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 259 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:30:50,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 06:30:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-19 06:30:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 06:30:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-19 06:30:50,597 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 53 [2022-03-19 06:30:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:50,598 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-19 06:30:50,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 06:30:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-19 06:30:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 06:30:50,599 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:50,600 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:50,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:50,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 06:30:50,808 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1953308764, now seen corresponding path program 5 times [2022-03-19 06:30:50,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:50,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [612794998] [2022-03-19 06:30:50,811 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:50,811 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:50,812 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1953308764, now seen corresponding path program 6 times [2022-03-19 06:30:50,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:50,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580582100] [2022-03-19 06:30:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:50,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:50,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:50,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041766729] [2022-03-19 06:30:50,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:30:50,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:50,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:50,829 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:50,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 06:30:51,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 06:30:51,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:51,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 06:30:51,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:30:51,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 06:30:51,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580582100] [2022-03-19 06:30:51,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041766729] [2022-03-19 06:30:51,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041766729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:51,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:51,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 06:30:51,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:51,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [612794998] [2022-03-19 06:30:51,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [612794998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:51,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:51,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 06:30:51,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391393697] [2022-03-19 06:30:51,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:51,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 06:30:51,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:51,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 06:30:51,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:30:51,508 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:30:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:51,578 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-03-19 06:30:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:30:51,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-03-19 06:30:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:51,579 INFO L225 Difference]: With dead ends: 70 [2022-03-19 06:30:51,579 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 06:30:51,580 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:30:51,580 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:51,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 105 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:51,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 06:30:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-19 06:30:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 06:30:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-03-19 06:30:51,589 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2022-03-19 06:30:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:51,589 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-03-19 06:30:51,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 06:30:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-03-19 06:30:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 06:30:51,590 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:51,590 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:51,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:51,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 06:30:51,797 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:51,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1425669898, now seen corresponding path program 7 times [2022-03-19 06:30:51,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:51,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1871045561] [2022-03-19 06:30:51,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:51,805 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:51,805 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1425669898, now seen corresponding path program 8 times [2022-03-19 06:30:51,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:51,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957828425] [2022-03-19 06:30:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:51,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:51,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:51,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109388050] [2022-03-19 06:30:51,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:51,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:51,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:51,831 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:51,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 06:30:52,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:52,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:52,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 06:30:52,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 06:30:52,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:53,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:53,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957828425] [2022-03-19 06:30:53,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:53,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109388050] [2022-03-19 06:30:53,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109388050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:53,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:53,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-19 06:30:53,200 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1871045561] [2022-03-19 06:30:53,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1871045561] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:53,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:53,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:30:53,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737176361] [2022-03-19 06:30:53,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:53,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:30:53,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:30:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:30:53,201 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 06:30:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:53,309 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-03-19 06:30:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 06:30:53,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 61 [2022-03-19 06:30:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:53,311 INFO L225 Difference]: With dead ends: 68 [2022-03-19 06:30:53,311 INFO L226 Difference]: Without dead ends: 62 [2022-03-19 06:30:53,311 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:30:53,312 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:53,312 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 326 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:30:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-19 06:30:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-03-19 06:30:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 06:30:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-19 06:30:53,321 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 61 [2022-03-19 06:30:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:53,322 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-19 06:30:53,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 06:30:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-19 06:30:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 06:30:53,323 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:53,323 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:53,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:53,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 06:30:53,529 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:53,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1579977147, now seen corresponding path program 7 times [2022-03-19 06:30:53,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:53,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190184676] [2022-03-19 06:30:53,533 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:53,534 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:53,534 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:53,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1579977147, now seen corresponding path program 8 times [2022-03-19 06:30:53,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:53,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14167728] [2022-03-19 06:30:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:53,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:53,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:53,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993491457] [2022-03-19 06:30:53,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:30:53,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:53,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:53,547 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:53,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 06:30:53,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:30:53,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:53,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 06:30:53,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:30:53,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 06:30:53,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:53,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14167728] [2022-03-19 06:30:53,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:53,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993491457] [2022-03-19 06:30:53,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993491457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:53,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:53,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 06:30:53,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:53,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190184676] [2022-03-19 06:30:53,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190184676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:53,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:53,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 06:30:53,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766091398] [2022-03-19 06:30:53,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:53,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 06:30:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 06:30:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:30:53,952 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 06:30:54,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:54,034 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2022-03-19 06:30:54,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 06:30:54,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 63 [2022-03-19 06:30:54,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:54,037 INFO L225 Difference]: With dead ends: 78 [2022-03-19 06:30:54,038 INFO L226 Difference]: Without dead ends: 68 [2022-03-19 06:30:54,038 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:30:54,040 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:54,040 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 111 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:54,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-19 06:30:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-03-19 06:30:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 06:30:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-03-19 06:30:54,056 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2022-03-19 06:30:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:54,057 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-03-19 06:30:54,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 06:30:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-03-19 06:30:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 06:30:54,058 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:54,058 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:54,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:54,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 06:30:54,271 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:54,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:54,272 INFO L85 PathProgramCache]: Analyzing trace with hash -423798549, now seen corresponding path program 9 times [2022-03-19 06:30:54,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:54,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1382681479] [2022-03-19 06:30:54,275 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:54,275 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:54,275 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:54,275 INFO L85 PathProgramCache]: Analyzing trace with hash -423798549, now seen corresponding path program 10 times [2022-03-19 06:30:54,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:54,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122028077] [2022-03-19 06:30:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:54,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:54,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:54,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122888870] [2022-03-19 06:30:54,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:30:54,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:54,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:54,286 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:54,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 06:30:54,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:30:54,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:54,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 06:30:54,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 06:30:54,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:54,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122028077] [2022-03-19 06:30:54,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122888870] [2022-03-19 06:30:54,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122888870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:30:54,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:30:54,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 06:30:54,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:54,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1382681479] [2022-03-19 06:30:54,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1382681479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:54,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:54,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:30:54,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710751263] [2022-03-19 06:30:54,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:54,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:30:54,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:54,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:30:54,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 06:30:54,764 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 06:30:54,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:54,887 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-03-19 06:30:54,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 06:30:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 69 [2022-03-19 06:30:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:54,889 INFO L225 Difference]: With dead ends: 76 [2022-03-19 06:30:54,889 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 06:30:54,889 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:30:54,890 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:54,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 383 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:30:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 06:30:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-19 06:30:54,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 12 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 06:30:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-03-19 06:30:54,899 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 69 [2022-03-19 06:30:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:54,900 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-03-19 06:30:54,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-19 06:30:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-03-19 06:30:54,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 06:30:54,900 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:54,900 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:54,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:55,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 06:30:55,101 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:55,102 INFO L85 PathProgramCache]: Analyzing trace with hash -802694170, now seen corresponding path program 9 times [2022-03-19 06:30:55,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:55,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1662012905] [2022-03-19 06:30:55,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:55,104 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:55,104 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:55,104 INFO L85 PathProgramCache]: Analyzing trace with hash -802694170, now seen corresponding path program 10 times [2022-03-19 06:30:55,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:55,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005406238] [2022-03-19 06:30:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:55,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:55,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:55,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954814906] [2022-03-19 06:30:55,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:30:55,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:55,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:55,115 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:55,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 06:30:55,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:30:55,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:30:55,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 06:30:55,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:30:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:30:55,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:30:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 72 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 06:30:55,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:30:55,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005406238] [2022-03-19 06:30:55,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:30:55,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954814906] [2022-03-19 06:30:55,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954814906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:30:55,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:30:55,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 06:30:55,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:30:55,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1662012905] [2022-03-19 06:30:55,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1662012905] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:30:55,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:30:55,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 06:30:55,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511554097] [2022-03-19 06:30:55,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:30:55,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 06:30:55,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 06:30:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:30:55,513 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 06:30:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:30:55,604 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-03-19 06:30:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:30:55,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2022-03-19 06:30:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:30:55,605 INFO L225 Difference]: With dead ends: 86 [2022-03-19 06:30:55,605 INFO L226 Difference]: Without dead ends: 76 [2022-03-19 06:30:55,606 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:30:55,606 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 06:30:55,607 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 108 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 06:30:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-19 06:30:55,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-19 06:30:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 06:30:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-03-19 06:30:55,616 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2022-03-19 06:30:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:30:55,617 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-03-19 06:30:55,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 06:30:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-03-19 06:30:55,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 06:30:55,618 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:30:55,618 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:30:55,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 06:30:55,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:55,841 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:30:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:30:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash 540885452, now seen corresponding path program 11 times [2022-03-19 06:30:55,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:30:55,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [162328945] [2022-03-19 06:30:55,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:30:55,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:30:55,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:30:55,845 INFO L85 PathProgramCache]: Analyzing trace with hash 540885452, now seen corresponding path program 12 times [2022-03-19 06:30:55,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:30:55,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346153966] [2022-03-19 06:30:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:30:55,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:30:55,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:30:55,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766202690] [2022-03-19 06:30:55,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:30:55,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:30:55,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:30:55,855 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:30:55,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 06:31:01,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 06:31:01,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:01,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 06:31:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 06:31:01,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:02,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:02,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346153966] [2022-03-19 06:31:02,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:02,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766202690] [2022-03-19 06:31:02,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766202690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:31:02,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:31:02,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 06:31:02,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:02,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [162328945] [2022-03-19 06:31:02,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [162328945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:02,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:02,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:31:02,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006874731] [2022-03-19 06:31:02,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:02,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:31:02,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:02,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:31:02,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:31:02,027 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 06:31:02,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:02,182 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-03-19 06:31:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 06:31:02,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 77 [2022-03-19 06:31:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:02,184 INFO L225 Difference]: With dead ends: 84 [2022-03-19 06:31:02,184 INFO L226 Difference]: Without dead ends: 78 [2022-03-19 06:31:02,184 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:31:02,185 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:02,186 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 464 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:31:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-19 06:31:02,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-03-19 06:31:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 06:31:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-03-19 06:31:02,199 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 77 [2022-03-19 06:31:02,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:02,199 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-03-19 06:31:02,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-19 06:31:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-03-19 06:31:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 06:31:02,200 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:02,200 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:02,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 06:31:02,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 06:31:02,411 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:02,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1454305145, now seen corresponding path program 11 times [2022-03-19 06:31:02,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:02,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [423490695] [2022-03-19 06:31:02,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:02,414 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:02,414 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:02,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1454305145, now seen corresponding path program 12 times [2022-03-19 06:31:02,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:02,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770325788] [2022-03-19 06:31:02,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:02,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:02,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:02,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597726842] [2022-03-19 06:31:02,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:31:02,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:02,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:02,425 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:31:02,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 06:31:02,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 06:31:02,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:02,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 06:31:02,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:31:02,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 06:31:02,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:02,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770325788] [2022-03-19 06:31:02,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:02,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597726842] [2022-03-19 06:31:02,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597726842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:31:02,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:31:02,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 06:31:02,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:02,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [423490695] [2022-03-19 06:31:02,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [423490695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:02,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:02,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 06:31:02,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043070884] [2022-03-19 06:31:02,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:02,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 06:31:02,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:02,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 06:31:02,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:31:02,956 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 06:31:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:03,093 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-03-19 06:31:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 06:31:03,094 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) Word has length 79 [2022-03-19 06:31:03,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:03,094 INFO L225 Difference]: With dead ends: 94 [2022-03-19 06:31:03,094 INFO L226 Difference]: Without dead ends: 84 [2022-03-19 06:31:03,095 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-19 06:31:03,096 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 18 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:03,096 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 105 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:31:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-19 06:31:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-19 06:31:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 06:31:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-03-19 06:31:03,106 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2022-03-19 06:31:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:03,106 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-03-19 06:31:03,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 06:31:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-03-19 06:31:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 06:31:03,107 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:03,107 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:03,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 06:31:03,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 06:31:03,316 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:03,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1082476115, now seen corresponding path program 13 times [2022-03-19 06:31:03,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:03,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1621769083] [2022-03-19 06:31:03,319 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:03,319 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:03,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:03,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1082476115, now seen corresponding path program 14 times [2022-03-19 06:31:03,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:03,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169524141] [2022-03-19 06:31:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:03,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:03,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:03,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9775467] [2022-03-19 06:31:03,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:31:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:03,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:03,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:31:03,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 06:31:04,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:31:04,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:04,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 06:31:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 06:31:04,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:04,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:04,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169524141] [2022-03-19 06:31:04,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:04,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9775467] [2022-03-19 06:31:04,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9775467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:31:04,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:31:04,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-19 06:31:04,973 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:04,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1621769083] [2022-03-19 06:31:04,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1621769083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:04,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:04,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:31:04,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456371233] [2022-03-19 06:31:04,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:04,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:31:04,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:04,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:31:04,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 06:31:04,974 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 06:31:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:05,128 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-03-19 06:31:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 06:31:05,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 85 [2022-03-19 06:31:05,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:05,130 INFO L225 Difference]: With dead ends: 92 [2022-03-19 06:31:05,130 INFO L226 Difference]: Without dead ends: 86 [2022-03-19 06:31:05,131 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:31:05,131 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 2 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:05,131 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 542 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:31:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-19 06:31:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-19 06:31:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 14 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:31:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-03-19 06:31:05,142 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 85 [2022-03-19 06:31:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:05,142 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-03-19 06:31:05,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-19 06:31:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-03-19 06:31:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 06:31:05,143 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:05,143 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:05,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 06:31:05,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 06:31:05,350 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:05,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1863324712, now seen corresponding path program 13 times [2022-03-19 06:31:05,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:05,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [58967312] [2022-03-19 06:31:05,353 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:05,353 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:05,353 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:05,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1863324712, now seen corresponding path program 14 times [2022-03-19 06:31:05,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:05,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945758469] [2022-03-19 06:31:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:05,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:05,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:05,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534264614] [2022-03-19 06:31:05,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:31:05,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:05,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:05,361 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:31:05,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 06:31:05,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:31:05,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:05,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 06:31:05,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:31:05,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 18 proven. 128 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 06:31:05,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:05,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945758469] [2022-03-19 06:31:05,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:05,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534264614] [2022-03-19 06:31:05,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534264614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:31:05,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:31:05,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 06:31:05,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:05,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [58967312] [2022-03-19 06:31:05,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [58967312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:05,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:05,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 06:31:05,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802663629] [2022-03-19 06:31:05,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:05,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 06:31:05,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:05,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 06:31:05,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:31:05,846 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 06:31:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:05,954 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2022-03-19 06:31:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 06:31:05,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) Word has length 87 [2022-03-19 06:31:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:05,955 INFO L225 Difference]: With dead ends: 102 [2022-03-19 06:31:05,955 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 06:31:05,956 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-19 06:31:05,956 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:05,957 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 120 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:31:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 06:31:05,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-19 06:31:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:31:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-03-19 06:31:05,967 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 87 [2022-03-19 06:31:05,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:05,968 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-03-19 06:31:05,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 06:31:05,968 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-03-19 06:31:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 06:31:05,968 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:05,968 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:05,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 06:31:06,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:06,171 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:06,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:06,172 INFO L85 PathProgramCache]: Analyzing trace with hash -243875698, now seen corresponding path program 15 times [2022-03-19 06:31:06,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:06,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [884683341] [2022-03-19 06:31:06,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:06,174 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:06,174 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:06,174 INFO L85 PathProgramCache]: Analyzing trace with hash -243875698, now seen corresponding path program 16 times [2022-03-19 06:31:06,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:06,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391931124] [2022-03-19 06:31:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:06,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:06,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:06,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804720442] [2022-03-19 06:31:06,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:31:06,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:06,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:06,183 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:31:06,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 06:31:06,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:31:06,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:06,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 06:31:06,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 06:31:06,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:06,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:06,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391931124] [2022-03-19 06:31:06,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:06,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804720442] [2022-03-19 06:31:06,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804720442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:31:06,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:31:06,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 06:31:06,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:06,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [884683341] [2022-03-19 06:31:06,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [884683341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:06,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:06,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:31:06,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797306568] [2022-03-19 06:31:06,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:06,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:31:06,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:06,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:31:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-19 06:31:06,707 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 06:31:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:06,913 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-03-19 06:31:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 06:31:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 93 [2022-03-19 06:31:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:06,915 INFO L225 Difference]: With dead ends: 100 [2022-03-19 06:31:06,915 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 06:31:06,915 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:31:06,916 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:06,916 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 626 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:31:06,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 06:31:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-19 06:31:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 15 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 06:31:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-03-19 06:31:06,925 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 93 [2022-03-19 06:31:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:06,926 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-03-19 06:31:06,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-19 06:31:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-03-19 06:31:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 06:31:06,926 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:06,927 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:06,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 06:31:07,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:07,127 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:07,128 INFO L85 PathProgramCache]: Analyzing trace with hash 304473801, now seen corresponding path program 15 times [2022-03-19 06:31:07,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:07,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1419911221] [2022-03-19 06:31:07,130 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:07,130 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:07,130 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash 304473801, now seen corresponding path program 16 times [2022-03-19 06:31:07,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:07,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080138567] [2022-03-19 06:31:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:07,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:07,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:07,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94259532] [2022-03-19 06:31:07,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:31:07,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:07,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:07,139 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:31:07,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 06:31:07,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:31:07,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:31:07,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 06:31:07,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:31:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:31:07,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:31:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 20 proven. 162 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 06:31:07,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:31:07,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080138567] [2022-03-19 06:31:07,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:31:07,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94259532] [2022-03-19 06:31:07,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94259532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:31:07,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:31:07,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 06:31:07,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:31:07,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1419911221] [2022-03-19 06:31:07,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1419911221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:31:07,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:31:07,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 06:31:07,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794831875] [2022-03-19 06:31:07,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:31:07,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 06:31:07,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:07,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 06:31:07,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:31:07,680 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:31:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:31:07,792 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2022-03-19 06:31:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 06:31:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) Word has length 95 [2022-03-19 06:31:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:31:07,793 INFO L225 Difference]: With dead ends: 110 [2022-03-19 06:31:07,793 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 06:31:07,794 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 06:31:07,794 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:31:07,795 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 126 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:31:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 06:31:07,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-19 06:31:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 06:31:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-03-19 06:31:07,804 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2022-03-19 06:31:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:31:07,805 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-03-19 06:31:07,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 06:31:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-03-19 06:31:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 06:31:07,806 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:31:07,806 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:31:07,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 06:31:08,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 06:31:08,009 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:31:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:31:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1379030639, now seen corresponding path program 17 times [2022-03-19 06:31:08,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:31:08,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1194408628] [2022-03-19 06:31:08,012 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:31:08,012 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:31:08,012 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:31:08,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1379030639, now seen corresponding path program 18 times [2022-03-19 06:31:08,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:31:08,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260145522] [2022-03-19 06:31:08,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:31:08,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:31:08,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:31:08,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549177697] [2022-03-19 06:31:08,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:31:08,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:31:08,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:31:08,023 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:31:08,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 06:32:13,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 06:32:13,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:13,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 06:32:13,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 22 proven. 180 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 06:32:13,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:13,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:13,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260145522] [2022-03-19 06:32:13,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:13,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549177697] [2022-03-19 06:32:13,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549177697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:32:13,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:32:13,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 06:32:13,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:13,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1194408628] [2022-03-19 06:32:13,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1194408628] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:13,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:13,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:32:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225304079] [2022-03-19 06:32:13,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:13,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:32:13,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:32:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-19 06:32:13,624 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 06:32:13,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:13,806 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2022-03-19 06:32:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 06:32:13,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 101 [2022-03-19 06:32:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:13,809 INFO L225 Difference]: With dead ends: 108 [2022-03-19 06:32:13,809 INFO L226 Difference]: Without dead ends: 102 [2022-03-19 06:32:13,809 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:32:13,810 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:13,810 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 716 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:32:13,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-19 06:32:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-19 06:32:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 06:32:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-03-19 06:32:13,822 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 101 [2022-03-19 06:32:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:13,822 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-03-19 06:32:13,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-19 06:32:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-03-19 06:32:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 06:32:13,823 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:13,823 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:13,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 06:32:14,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 06:32:14,024 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash 844335210, now seen corresponding path program 17 times [2022-03-19 06:32:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:14,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [560045728] [2022-03-19 06:32:14,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:14,027 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:14,027 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:14,027 INFO L85 PathProgramCache]: Analyzing trace with hash 844335210, now seen corresponding path program 18 times [2022-03-19 06:32:14,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:14,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053879933] [2022-03-19 06:32:14,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:14,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:14,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:14,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658160335] [2022-03-19 06:32:14,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:32:14,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:14,035 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:14,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 06:32:14,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-19 06:32:14,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:14,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 06:32:14,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:32:14,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 06:32:15,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:15,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053879933] [2022-03-19 06:32:15,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:15,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658160335] [2022-03-19 06:32:15,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658160335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:32:15,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:32:15,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-19 06:32:15,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:15,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [560045728] [2022-03-19 06:32:15,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [560045728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:15,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:15,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 06:32:15,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17931342] [2022-03-19 06:32:15,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:15,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 06:32:15,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:15,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 06:32:15,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-19 06:32:15,169 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 06:32:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:15,304 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2022-03-19 06:32:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 06:32:15,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) Word has length 103 [2022-03-19 06:32:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:15,305 INFO L225 Difference]: With dead ends: 118 [2022-03-19 06:32:15,305 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 06:32:15,306 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 06:32:15,306 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:15,306 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 150 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:32:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 06:32:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-03-19 06:32:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 06:32:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-03-19 06:32:15,318 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 103 [2022-03-19 06:32:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:15,318 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-03-19 06:32:15,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 13 states have internal predecessors, (74), 13 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 06:32:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-03-19 06:32:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-19 06:32:15,319 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:15,319 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:15,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-19 06:32:15,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:15,523 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash -324109488, now seen corresponding path program 19 times [2022-03-19 06:32:15,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:15,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1880530115] [2022-03-19 06:32:15,526 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:15,526 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:15,526 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:15,526 INFO L85 PathProgramCache]: Analyzing trace with hash -324109488, now seen corresponding path program 20 times [2022-03-19 06:32:15,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:15,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645762072] [2022-03-19 06:32:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:15,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:15,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:15,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986002540] [2022-03-19 06:32:15,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:32:15,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:15,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:15,536 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:15,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 06:32:16,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:32:16,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:16,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 06:32:16,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 24 proven. 220 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 06:32:16,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:16,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:16,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645762072] [2022-03-19 06:32:16,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:16,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986002540] [2022-03-19 06:32:16,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986002540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:32:16,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:32:16,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 06:32:16,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:16,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1880530115] [2022-03-19 06:32:16,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1880530115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:16,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:16,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:32:16,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823452126] [2022-03-19 06:32:16,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:16,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:32:16,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:16,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:32:16,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-19 06:32:16,917 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 06:32:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:17,188 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-03-19 06:32:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 06:32:17,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 109 [2022-03-19 06:32:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:17,189 INFO L225 Difference]: With dead ends: 116 [2022-03-19 06:32:17,189 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 06:32:17,190 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-19 06:32:17,190 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 2 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:17,190 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 812 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:32:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 06:32:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-19 06:32:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 17 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 06:32:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-03-19 06:32:17,204 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 109 [2022-03-19 06:32:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:17,204 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-03-19 06:32:17,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-19 06:32:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-03-19 06:32:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 06:32:17,205 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:17,205 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:17,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 06:32:17,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:17,411 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:17,412 INFO L85 PathProgramCache]: Analyzing trace with hash 509212939, now seen corresponding path program 19 times [2022-03-19 06:32:17,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:17,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1178260700] [2022-03-19 06:32:17,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:17,414 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:17,414 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:17,414 INFO L85 PathProgramCache]: Analyzing trace with hash 509212939, now seen corresponding path program 20 times [2022-03-19 06:32:17,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:17,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076366004] [2022-03-19 06:32:17,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:17,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:17,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:17,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621374408] [2022-03-19 06:32:17,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:32:17,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:17,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:17,423 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:17,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 06:32:17,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:32:17,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:17,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 06:32:17,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:32:17,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 24 proven. 242 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 06:32:18,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:18,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076366004] [2022-03-19 06:32:18,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:18,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621374408] [2022-03-19 06:32:18,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621374408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:32:18,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:32:18,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-19 06:32:18,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:18,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1178260700] [2022-03-19 06:32:18,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1178260700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:18,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:18,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 06:32:18,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822450962] [2022-03-19 06:32:18,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:18,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 06:32:18,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:18,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 06:32:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-19 06:32:18,035 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 06:32:18,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:18,179 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2022-03-19 06:32:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 06:32:18,179 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) Word has length 111 [2022-03-19 06:32:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:18,180 INFO L225 Difference]: With dead ends: 126 [2022-03-19 06:32:18,180 INFO L226 Difference]: Without dead ends: 116 [2022-03-19 06:32:18,181 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 06:32:18,181 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:18,182 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 165 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:32:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-19 06:32:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-03-19 06:32:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 06:32:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-03-19 06:32:18,208 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 111 [2022-03-19 06:32:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:18,208 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-03-19 06:32:18,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 14 states have internal predecessors, (80), 14 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 06:32:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-03-19 06:32:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 06:32:18,209 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:18,209 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:18,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 06:32:18,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 06:32:18,425 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:18,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:18,426 INFO L85 PathProgramCache]: Analyzing trace with hash 988557105, now seen corresponding path program 21 times [2022-03-19 06:32:18,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:18,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [150358863] [2022-03-19 06:32:18,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:18,428 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:18,429 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash 988557105, now seen corresponding path program 22 times [2022-03-19 06:32:18,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:18,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382983312] [2022-03-19 06:32:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:18,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:18,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:18,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679869121] [2022-03-19 06:32:18,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:32:18,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:18,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:18,452 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:18,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 06:32:18,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:32:18,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:18,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 06:32:18,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 06:32:18,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:18,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:18,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382983312] [2022-03-19 06:32:18,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:18,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679869121] [2022-03-19 06:32:18,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679869121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:32:18,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:32:18,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-19 06:32:18,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:18,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [150358863] [2022-03-19 06:32:18,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [150358863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:18,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:18,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 06:32:18,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110547419] [2022-03-19 06:32:18,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:18,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 06:32:18,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:18,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 06:32:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-19 06:32:18,991 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 06:32:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:19,254 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-03-19 06:32:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 06:32:19,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 117 [2022-03-19 06:32:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:19,255 INFO L225 Difference]: With dead ends: 124 [2022-03-19 06:32:19,255 INFO L226 Difference]: Without dead ends: 118 [2022-03-19 06:32:19,255 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:32:19,256 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 2 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:19,256 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 914 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:32:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-19 06:32:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-03-19 06:32:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 18 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 06:32:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-03-19 06:32:19,278 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 117 [2022-03-19 06:32:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:19,279 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-03-19 06:32:19,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-19 06:32:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-03-19 06:32:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-19 06:32:19,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:19,280 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:19,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 06:32:19,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 06:32:19,484 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:19,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:19,484 INFO L85 PathProgramCache]: Analyzing trace with hash -738576212, now seen corresponding path program 21 times [2022-03-19 06:32:19,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:19,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1076474282] [2022-03-19 06:32:19,488 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:19,488 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:19,488 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:19,488 INFO L85 PathProgramCache]: Analyzing trace with hash -738576212, now seen corresponding path program 22 times [2022-03-19 06:32:19,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:19,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165623038] [2022-03-19 06:32:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:19,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:19,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:19,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084668796] [2022-03-19 06:32:19,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:32:19,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:19,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:19,512 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:19,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 06:32:19,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:32:19,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:19,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 06:32:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:32:19,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 26 proven. 288 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 06:32:20,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:20,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165623038] [2022-03-19 06:32:20,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:20,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084668796] [2022-03-19 06:32:20,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084668796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:32:20,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:32:20,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-19 06:32:20,169 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:20,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1076474282] [2022-03-19 06:32:20,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1076474282] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:20,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:20,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 06:32:20,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148654335] [2022-03-19 06:32:20,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:20,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 06:32:20,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 06:32:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-19 06:32:20,170 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 06:32:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:20,323 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2022-03-19 06:32:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 06:32:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Word has length 119 [2022-03-19 06:32:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:20,325 INFO L225 Difference]: With dead ends: 134 [2022-03-19 06:32:20,325 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 06:32:20,326 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 06:32:20,326 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 18 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:20,326 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 171 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:32:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 06:32:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-19 06:32:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 06:32:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-03-19 06:32:20,342 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2022-03-19 06:32:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:20,342 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-03-19 06:32:20,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 15 states have call successors, (17), 15 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 06:32:20,343 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-03-19 06:32:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-19 06:32:20,343 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:20,343 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:20,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-19 06:32:20,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 06:32:20,551 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash 636252690, now seen corresponding path program 23 times [2022-03-19 06:32:20,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:20,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95488662] [2022-03-19 06:32:20,554 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:20,554 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:20,554 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:20,554 INFO L85 PathProgramCache]: Analyzing trace with hash 636252690, now seen corresponding path program 24 times [2022-03-19 06:32:20,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:20,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788998467] [2022-03-19 06:32:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:20,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:20,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:20,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930714086] [2022-03-19 06:32:20,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:32:20,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:20,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:20,566 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:20,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 06:32:23,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-19 06:32:23,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:23,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 06:32:23,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 28 proven. 312 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 06:32:24,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:24,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:24,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788998467] [2022-03-19 06:32:24,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:24,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930714086] [2022-03-19 06:32:24,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930714086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:32:24,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:32:24,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-19 06:32:24,889 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:24,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95488662] [2022-03-19 06:32:24,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95488662] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:24,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:24,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 06:32:24,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792069864] [2022-03-19 06:32:24,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:24,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 06:32:24,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 06:32:24,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2022-03-19 06:32:24,891 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 15 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 06:32:25,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:25,262 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2022-03-19 06:32:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 06:32:25,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 15 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 125 [2022-03-19 06:32:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:25,263 INFO L225 Difference]: With dead ends: 132 [2022-03-19 06:32:25,263 INFO L226 Difference]: Without dead ends: 126 [2022-03-19 06:32:25,264 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 06:32:25,264 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:25,264 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1022 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 06:32:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-19 06:32:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-03-19 06:32:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 19 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 06:32:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-03-19 06:32:25,281 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 125 [2022-03-19 06:32:25,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:25,281 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-03-19 06:32:25,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 15 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-19 06:32:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-03-19 06:32:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 06:32:25,282 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:25,282 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:25,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-19 06:32:25,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 06:32:25,492 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:25,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:25,492 INFO L85 PathProgramCache]: Analyzing trace with hash -702643, now seen corresponding path program 23 times [2022-03-19 06:32:25,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:25,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [552466956] [2022-03-19 06:32:25,494 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:25,494 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:25,494 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:25,494 INFO L85 PathProgramCache]: Analyzing trace with hash -702643, now seen corresponding path program 24 times [2022-03-19 06:32:25,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:25,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657889128] [2022-03-19 06:32:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:25,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:25,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:25,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185453003] [2022-03-19 06:32:25,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:32:25,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:25,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:25,504 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:25,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 06:32:28,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-19 06:32:28,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 06:32:28,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:32:28,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 28 proven. 338 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 06:32:28,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:28,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657889128] [2022-03-19 06:32:28,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:28,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185453003] [2022-03-19 06:32:28,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185453003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:32:28,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:32:28,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-19 06:32:28,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:28,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [552466956] [2022-03-19 06:32:28,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [552466956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:28,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:28,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 06:32:28,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582821894] [2022-03-19 06:32:28,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:28,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 06:32:28,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:28,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 06:32:28,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-19 06:32:28,873 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 06:32:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:29,084 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2022-03-19 06:32:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 06:32:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) Word has length 127 [2022-03-19 06:32:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:29,085 INFO L225 Difference]: With dead ends: 142 [2022-03-19 06:32:29,085 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 06:32:29,086 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 06:32:29,086 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 18 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:29,087 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 150 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:32:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 06:32:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-19 06:32:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 06:32:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2022-03-19 06:32:29,104 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 127 [2022-03-19 06:32:29,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:29,105 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2022-03-19 06:32:29,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 16 states have internal predecessors, (92), 16 states have call successors, (18), 16 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 06:32:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2022-03-19 06:32:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 06:32:29,106 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:29,106 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:29,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-19 06:32:29,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 06:32:29,316 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash 95437811, now seen corresponding path program 25 times [2022-03-19 06:32:29,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:29,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1110616746] [2022-03-19 06:32:29,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:29,319 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:29,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:29,319 INFO L85 PathProgramCache]: Analyzing trace with hash 95437811, now seen corresponding path program 26 times [2022-03-19 06:32:29,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:29,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188354442] [2022-03-19 06:32:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:29,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:29,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:29,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099517954] [2022-03-19 06:32:29,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:32:29,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:29,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:29,328 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:29,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 06:32:31,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:32:31,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:31,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 06:32:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 30 proven. 364 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 06:32:31,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:31,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:31,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188354442] [2022-03-19 06:32:31,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:31,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099517954] [2022-03-19 06:32:31,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099517954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:32:31,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:32:31,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-19 06:32:31,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:31,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1110616746] [2022-03-19 06:32:31,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1110616746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:31,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:31,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:32:31,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845912784] [2022-03-19 06:32:31,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:31,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 06:32:31,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:31,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 06:32:31,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-19 06:32:31,608 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 16 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 06:32:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:31,891 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-03-19 06:32:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 06:32:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 16 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 133 [2022-03-19 06:32:31,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:31,892 INFO L225 Difference]: With dead ends: 140 [2022-03-19 06:32:31,892 INFO L226 Difference]: Without dead ends: 134 [2022-03-19 06:32:31,892 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-19 06:32:31,893 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:31,893 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1119 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 06:32:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-19 06:32:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-03-19 06:32:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 20 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 06:32:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-03-19 06:32:31,905 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 133 [2022-03-19 06:32:31,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:31,906 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-03-19 06:32:31,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 16 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-19 06:32:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-03-19 06:32:31,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 06:32:31,906 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:31,907 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:31,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-19 06:32:32,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:32,112 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:32,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:32,112 INFO L85 PathProgramCache]: Analyzing trace with hash -32758546, now seen corresponding path program 25 times [2022-03-19 06:32:32,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:32,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219373413] [2022-03-19 06:32:32,114 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:32,114 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:32,114 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash -32758546, now seen corresponding path program 26 times [2022-03-19 06:32:32,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:32,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281554297] [2022-03-19 06:32:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:32,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:32,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:32,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320941512] [2022-03-19 06:32:32,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 06:32:32,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:32,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:32,125 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:32,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 06:32:32,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 06:32:32,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:32,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 06:32:32,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:32:32,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 30 proven. 392 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 06:32:32,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:32,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281554297] [2022-03-19 06:32:32,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:32,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320941512] [2022-03-19 06:32:32,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320941512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:32:32,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:32:32,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-19 06:32:32,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:32,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219373413] [2022-03-19 06:32:32,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219373413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:32,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:32,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 06:32:32,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017549329] [2022-03-19 06:32:32,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:32,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 06:32:32,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:32,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 06:32:32,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 06:32:32,969 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 17 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 16 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 06:32:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:33,161 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2022-03-19 06:32:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 06:32:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 17 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 16 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) Word has length 135 [2022-03-19 06:32:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:33,162 INFO L225 Difference]: With dead ends: 150 [2022-03-19 06:32:33,162 INFO L226 Difference]: Without dead ends: 140 [2022-03-19 06:32:33,163 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 06:32:33,163 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:33,164 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 165 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:32:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-19 06:32:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-03-19 06:32:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 06:32:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2022-03-19 06:32:33,181 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 135 [2022-03-19 06:32:33,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:33,181 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2022-03-19 06:32:33,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 17 states have internal predecessors, (98), 17 states have call successors, (19), 17 states have call predecessors, (19), 16 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 06:32:33,181 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2022-03-19 06:32:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 06:32:33,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:33,182 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:33,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 06:32:33,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 06:32:33,405 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:33,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1590123308, now seen corresponding path program 27 times [2022-03-19 06:32:33,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:33,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [860077896] [2022-03-19 06:32:33,408 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:33,408 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:33,408 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1590123308, now seen corresponding path program 28 times [2022-03-19 06:32:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:33,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918000544] [2022-03-19 06:32:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:33,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:33,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:33,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703068069] [2022-03-19 06:32:33,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:32:33,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:33,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:33,418 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:33,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 06:32:33,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:32:33,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 06:32:33,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 32 proven. 420 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 06:32:33,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:34,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:34,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918000544] [2022-03-19 06:32:34,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:34,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703068069] [2022-03-19 06:32:34,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703068069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 06:32:34,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 06:32:34,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-19 06:32:34,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [860077896] [2022-03-19 06:32:34,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [860077896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:34,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:34,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 06:32:34,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155267488] [2022-03-19 06:32:34,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:34,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 06:32:34,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:34,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 06:32:34,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-19 06:32:34,112 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 17 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 06:32:34,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:34,453 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-03-19 06:32:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 06:32:34,453 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 17 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 141 [2022-03-19 06:32:34,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:34,454 INFO L225 Difference]: With dead ends: 148 [2022-03-19 06:32:34,454 INFO L226 Difference]: Without dead ends: 142 [2022-03-19 06:32:34,455 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-19 06:32:34,455 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 2 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:34,455 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1256 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 06:32:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-19 06:32:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-19 06:32:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 21 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 06:32:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-03-19 06:32:34,476 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 141 [2022-03-19 06:32:34,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:34,476 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-03-19 06:32:34,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 17 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-19 06:32:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-03-19 06:32:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 06:32:34,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:34,477 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:34,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 06:32:34,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:34,692 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:34,692 INFO L85 PathProgramCache]: Analyzing trace with hash -654323313, now seen corresponding path program 27 times [2022-03-19 06:32:34,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:34,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1896646319] [2022-03-19 06:32:34,694 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:34,694 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:34,694 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:34,695 INFO L85 PathProgramCache]: Analyzing trace with hash -654323313, now seen corresponding path program 28 times [2022-03-19 06:32:34,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:34,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425964933] [2022-03-19 06:32:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:34,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:34,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:34,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198906602] [2022-03-19 06:32:34,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 06:32:34,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:34,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:34,703 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:34,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 06:32:34,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 06:32:34,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 06:32:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 06:32:34,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 06:32:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 06:32:35,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 06:32:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 32 proven. 450 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 06:32:35,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 06:32:35,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425964933] [2022-03-19 06:32:35,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 06:32:35,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198906602] [2022-03-19 06:32:35,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198906602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 06:32:35,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 06:32:35,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-19 06:32:35,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 06:32:35,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1896646319] [2022-03-19 06:32:35,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1896646319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 06:32:35,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 06:32:35,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 06:32:35,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517469484] [2022-03-19 06:32:35,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 06:32:35,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 06:32:35,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:35,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 06:32:35,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 06:32:35,619 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 17 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 06:32:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 06:32:35,839 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2022-03-19 06:32:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 06:32:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 17 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Word has length 143 [2022-03-19 06:32:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 06:32:35,841 INFO L225 Difference]: With dead ends: 158 [2022-03-19 06:32:35,841 INFO L226 Difference]: Without dead ends: 148 [2022-03-19 06:32:35,841 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 06:32:35,842 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 06:32:35,842 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 180 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 06:32:35,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-19 06:32:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-03-19 06:32:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 06:32:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-03-19 06:32:35,857 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2022-03-19 06:32:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 06:32:35,857 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-03-19 06:32:35,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 18 states have call successors, (20), 18 states have call predecessors, (20), 17 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 06:32:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-03-19 06:32:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 06:32:35,858 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 06:32:35,859 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 06:32:35,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-19 06:32:36,061 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:36,061 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 06:32:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 06:32:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash 780571829, now seen corresponding path program 29 times [2022-03-19 06:32:36,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 06:32:36,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975832511] [2022-03-19 06:32:36,063 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 06:32:36,064 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 06:32:36,064 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 06:32:36,064 INFO L85 PathProgramCache]: Analyzing trace with hash 780571829, now seen corresponding path program 30 times [2022-03-19 06:32:36,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 06:32:36,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102931943] [2022-03-19 06:32:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 06:32:36,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 06:32:36,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 06:32:36,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260869237] [2022-03-19 06:32:36,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 06:32:36,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 06:32:36,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 06:32:36,072 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 06:32:36,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process