/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/hard2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:45:41,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:45:41,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:45:41,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 13:45:41,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 13:45:41,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 13:45:41,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 13:45:41,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 13:45:41,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 13:45:41,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 13:45:41,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 13:45:41,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 13:45:41,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 13:45:41,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 13:45:41,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 13:45:41,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 13:45:41,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 13:45:41,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 13:45:41,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 13:45:41,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 13:45:41,533 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 13:45:41,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 13:45:41,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 13:45:41,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 13:45:41,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 13:45:41,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 13:45:41,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 13:45:41,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 13:45:41,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 13:45:41,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 13:45:41,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 13:45:41,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 13:45:41,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 13:45:41,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 13:45:41,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 13:45:41,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 13:45:41,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 13:45:41,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 13:45:41,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 13:45:41,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:45:41,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:45:41,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:45:41,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 13:45:41,570 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:45:41,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:45:41,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:45:41,573 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:45:41,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:45:41,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:45:41,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:45:41,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:45:41,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:45:41,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:45:41,574 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:45:41,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:45:41,574 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:45:41,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:45:41,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:45:41,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:45:41,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:45:41,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:45:41,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:45:41,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:45:41,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:45:41,575 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:45:41,575 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:45:41,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:45:41,576 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:45:41,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:45:41,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:45:41,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:45:41,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:45:41,813 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:45:41,814 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:45:41,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard2.c [2022-03-20 13:45:41,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd9358a5/797c81a3918047d3a7ab60fc28722709/FLAG4cb1f6e8c [2022-03-20 13:45:42,244 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:45:42,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c [2022-03-20 13:45:42,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd9358a5/797c81a3918047d3a7ab60fc28722709/FLAG4cb1f6e8c [2022-03-20 13:45:42,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd9358a5/797c81a3918047d3a7ab60fc28722709 [2022-03-20 13:45:42,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:45:42,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:45:42,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:45:42,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:45:42,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:45:42,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:45:42" (1/1) ... [2022-03-20 13:45:42,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639aee70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:45:42, skipping insertion in model container [2022-03-20 13:45:42,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:45:42" (1/1) ... [2022-03-20 13:45:42,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:45:42,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:45:42,888 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/hard2.c[526,539] [2022-03-20 13:45:42,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:45:42,912 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:45:42,922 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/hard2.c[526,539] [2022-03-20 13:45:42,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:45:42,946 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:45:42,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:45:42 WrapperNode [2022-03-20 13:45:42,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:45:42,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:45:42,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:45:42,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:45:42,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:45:42" (1/1) ... [2022-03-20 13:45:42,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:45:42" (1/1) ... [2022-03-20 13:45:42,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:45:42" (1/1) ... [2022-03-20 13:45:42,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:45:42" (1/1) ... [2022-03-20 13:45:42,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:45:42" (1/1) ... [2022-03-20 13:45:42,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:45:42" (1/1) ... [2022-03-20 13:45:42,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:45:42" (1/1) ... [2022-03-20 13:45:42,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:45:42,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:45:42,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:45:42,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:45:42,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:45:42" (1/1) ... [2022-03-20 13:45:42,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:45:43,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:45:43,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 13:45:43,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 13:45:43,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:45:43,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:45:43,067 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:45:43,067 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 13:45:43,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:45:43,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:45:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:45:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:45:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:45:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:45:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 13:45:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 13:45:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:45:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:45:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:45:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:45:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:45:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:45:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:45:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:45:43,128 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:45:43,130 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:45:43,239 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:45:43,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:45:43,244 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 13:45:43,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:45:43 BoogieIcfgContainer [2022-03-20 13:45:43,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:45:43,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:45:43,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:45:43,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:45:43,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:45:42" (1/3) ... [2022-03-20 13:45:43,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9fcf9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:45:43, skipping insertion in model container [2022-03-20 13:45:43,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:45:42" (2/3) ... [2022-03-20 13:45:43,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9fcf9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:45:43, skipping insertion in model container [2022-03-20 13:45:43,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:45:43" (3/3) ... [2022-03-20 13:45:43,252 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2.c [2022-03-20 13:45:43,255 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:45:43,256 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:45:43,304 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:45:43,309 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 [2022-03-20 13:45:43,309 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:45:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 13:45:43,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 13:45:43,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:45:43,341 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:45:43,342 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:45:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:45:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1030421658, now seen corresponding path program 1 times [2022-03-20 13:45:43,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:43,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [834815291] [2022-03-20 13:45:43,386 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:45:43,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1030421658, now seen corresponding path program 2 times [2022-03-20 13:45:43,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:45:43,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689671842] [2022-03-20 13:45:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:45:43,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:45:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:45:43,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:45:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:45:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:45:43,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:45:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689671842] [2022-03-20 13:45:43,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689671842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:43,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:43,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:45:43,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:45:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [834815291] [2022-03-20 13:45:43,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [834815291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:43,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:43,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:45:43,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56544949] [2022-03-20 13:45:43,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:45:43,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:45:43,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:43,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:45:43,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:45:43,675 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:45:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:45:43,855 INFO L93 Difference]: Finished difference Result 66 states and 111 transitions. [2022-03-20 13:45:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:45:43,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 13:45:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:45:43,863 INFO L225 Difference]: With dead ends: 66 [2022-03-20 13:45:43,864 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 13:45:43,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:45:43,869 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:45:43,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 48 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:45:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 13:45:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-03-20 13:45:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 13:45:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-03-20 13:45:43,904 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 11 [2022-03-20 13:45:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:45:43,904 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-03-20 13:45:43,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:45:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-03-20 13:45:43,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 13:45:43,905 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:45:43,905 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:45:43,905 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:45:43,906 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:45:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:45:43,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1237898617, now seen corresponding path program 1 times [2022-03-20 13:45:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:43,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113424489] [2022-03-20 13:45:43,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:45:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1237898617, now seen corresponding path program 2 times [2022-03-20 13:45:43,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:45:43,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253553074] [2022-03-20 13:45:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:45:43,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:45:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:45:43,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:45:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:45:43,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 13:45:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:45:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:45:43,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:45:43,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253553074] [2022-03-20 13:45:43,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253553074] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:43,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:43,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:45:43,966 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:45:43,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113424489] [2022-03-20 13:45:43,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113424489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:43,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:43,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:45:43,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269161008] [2022-03-20 13:45:43,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:45:43,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:45:43,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:43,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:45:43,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:45:43,968 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:45:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:45:44,083 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-03-20 13:45:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:45:44,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-03-20 13:45:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:45:44,085 INFO L225 Difference]: With dead ends: 41 [2022-03-20 13:45:44,085 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 13:45:44,085 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:45:44,087 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:45:44,087 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:45:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 13:45:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-03-20 13:45:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 13:45:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-20 13:45:44,096 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 16 [2022-03-20 13:45:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:45:44,096 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-20 13:45:44,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:45:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-20 13:45:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 13:45:44,097 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:45:44,097 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:45:44,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 13:45:44,097 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:45:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:45:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash 998817914, now seen corresponding path program 1 times [2022-03-20 13:45:44,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:44,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [128493706] [2022-03-20 13:45:44,098 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:45:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash 998817914, now seen corresponding path program 2 times [2022-03-20 13:45:44,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:45:44,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418905508] [2022-03-20 13:45:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:45:44,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:45:44,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:45:44,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348416772] [2022-03-20 13:45:44,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:45:44,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:45:44,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:45:44,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 13:45:44,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:45:44,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:45:44,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:45:44,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:45:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:45:44,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:45:44,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:45:44,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418905508] [2022-03-20 13:45:44,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:45:44,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348416772] [2022-03-20 13:45:44,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348416772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:44,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:44,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:45:44,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:45:44,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [128493706] [2022-03-20 13:45:44,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [128493706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:44,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:44,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:45:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713191744] [2022-03-20 13:45:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:45:44,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:45:44,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:44,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:45:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:45:44,295 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:45:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:45:44,358 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2022-03-20 13:45:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:45:44,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 21 [2022-03-20 13:45:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:45:44,359 INFO L225 Difference]: With dead ends: 60 [2022-03-20 13:45:44,359 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 13:45:44,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:45:44,361 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:45:44,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:45:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 13:45:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 13:45:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 13:45:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-03-20 13:45:44,372 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2022-03-20 13:45:44,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:45:44,372 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-03-20 13:45:44,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:45:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-03-20 13:45:44,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 13:45:44,373 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:45:44,373 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:45:44,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 13:45:44,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:44,594 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:45:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:45:44,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1073979732, now seen corresponding path program 1 times [2022-03-20 13:45:44,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:44,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [458343716] [2022-03-20 13:45:44,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:45:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1073979732, now seen corresponding path program 2 times [2022-03-20 13:45:44,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:45:44,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361182147] [2022-03-20 13:45:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:45:44,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:45:44,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:45:44,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58441182] [2022-03-20 13:45:44,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:45:44,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:44,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:45:44,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:45:44,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 13:45:44,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:45:44,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:45:44,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 13:45:44,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:45:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:45:44,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:45:44,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:45:44,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361182147] [2022-03-20 13:45:44,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:45:44,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58441182] [2022-03-20 13:45:44,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58441182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:44,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:44,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:45:44,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:45:44,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [458343716] [2022-03-20 13:45:44,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [458343716] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:44,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:44,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:45:44,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13212314] [2022-03-20 13:45:44,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:45:44,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:45:44,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:44,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:45:44,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:45:44,747 INFO L87 Difference]: Start difference. First operand 46 states and 57 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:45:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:45:44,793 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-03-20 13:45:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:45:44,794 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 13:45:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:45:44,795 INFO L225 Difference]: With dead ends: 59 [2022-03-20 13:45:44,795 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 13:45:44,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:45:44,796 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:45:44,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 89 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:45:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 13:45:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-20 13:45:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 13:45:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-03-20 13:45:44,808 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 28 [2022-03-20 13:45:44,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:45:44,808 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-03-20 13:45:44,808 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:45:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-03-20 13:45:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 13:45:44,809 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:45:44,809 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:45:44,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 13:45:45,032 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,SelfDestructingSolverStorable3 [2022-03-20 13:45:45,032 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:45:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:45:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1568039909, now seen corresponding path program 1 times [2022-03-20 13:45:45,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:45,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1670746203] [2022-03-20 13:45:45,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:45:45,052 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:45:45,052 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:45:45,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1568039909, now seen corresponding path program 2 times [2022-03-20 13:45:45,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:45:45,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959802030] [2022-03-20 13:45:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:45:45,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:45:45,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:45:45,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532164710] [2022-03-20 13:45:45,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:45:45,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:45,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:45:45,068 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:45:45,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 13:45:45,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:45:45,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:45:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 13:45:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:45:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 13:45:45,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:45:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 13:45:45,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:45:45,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959802030] [2022-03-20 13:45:45,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:45:45,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532164710] [2022-03-20 13:45:45,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532164710] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 13:45:45,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:45:45,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 13:45:45,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:45:45,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1670746203] [2022-03-20 13:45:45,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1670746203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:45,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:45,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:45:45,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096527136] [2022-03-20 13:45:45,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:45:45,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:45:45,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:45:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:45:45,403 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:45:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:45:45,519 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-03-20 13:45:45,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:45:45,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-03-20 13:45:45,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:45:45,522 INFO L225 Difference]: With dead ends: 63 [2022-03-20 13:45:45,522 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 13:45:45,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:45:45,523 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:45:45,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:45:45,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 13:45:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-03-20 13:45:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 13:45:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-03-20 13:45:45,536 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 38 [2022-03-20 13:45:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:45:45,536 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-03-20 13:45:45,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:45:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-03-20 13:45:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 13:45:45,538 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:45:45,538 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:45:45,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 13:45:45,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:45,764 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:45:45,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:45:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash -697745896, now seen corresponding path program 1 times [2022-03-20 13:45:45,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:45,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [996076009] [2022-03-20 13:45:45,772 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:45:45,772 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:45:45,772 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:45:45,772 INFO L85 PathProgramCache]: Analyzing trace with hash -697745896, now seen corresponding path program 2 times [2022-03-20 13:45:45,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:45:45,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789510520] [2022-03-20 13:45:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:45:45,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:45:45,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:45:45,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611653086] [2022-03-20 13:45:45,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:45:45,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:45,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:45:45,789 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:45:45,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 13:45:45,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:45:45,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:45:45,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 13:45:45,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:45:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 13:45:46,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:45:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 13:45:47,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:45:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789510520] [2022-03-20 13:45:47,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:45:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611653086] [2022-03-20 13:45:47,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611653086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:45:47,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:45:47,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 13:45:47,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:45:47,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [996076009] [2022-03-20 13:45:47,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [996076009] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:47,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:47,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:45:47,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393949671] [2022-03-20 13:45:47,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:45:47,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:45:47,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:45:47,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:45:47,119 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 13:45:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:45:47,248 INFO L93 Difference]: Finished difference Result 124 states and 158 transitions. [2022-03-20 13:45:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:45:47,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2022-03-20 13:45:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:45:47,250 INFO L225 Difference]: With dead ends: 124 [2022-03-20 13:45:47,250 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 13:45:47,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:45:47,251 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:45:47,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 206 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:45:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 13:45:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-03-20 13:45:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 59 states have internal predecessors, (65), 24 states have call successors, (24), 13 states have call predecessors, (24), 12 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 13:45:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2022-03-20 13:45:47,267 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 58 [2022-03-20 13:45:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:45:47,268 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2022-03-20 13:45:47,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 13:45:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2022-03-20 13:45:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 13:45:47,270 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:45:47,270 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:45:47,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 13:45:47,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:47,489 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:45:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:45:47,489 INFO L85 PathProgramCache]: Analyzing trace with hash -833392887, now seen corresponding path program 3 times [2022-03-20 13:45:47,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:47,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1521475286] [2022-03-20 13:45:47,495 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:45:47,495 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:45:47,495 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:45:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash -833392887, now seen corresponding path program 4 times [2022-03-20 13:45:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:45:47,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289574524] [2022-03-20 13:45:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:45:47,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:45:47,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:45:47,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376285996] [2022-03-20 13:45:47,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:45:47,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:45:47,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:45:47,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:45:47,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 13:45:47,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:45:47,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:45:47,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 13:45:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:45:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 49 proven. 37 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 13:45:53,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:45:54,157 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:45:54,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:45:54,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289574524] [2022-03-20 13:45:54,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:45:54,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376285996] [2022-03-20 13:45:54,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376285996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:45:54,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:45:54,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 13:45:54,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:45:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1521475286] [2022-03-20 13:45:54,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1521475286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:45:54,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:45:54,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:45:54,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731668927] [2022-03-20 13:45:54,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:45:54,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:45:54,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:45:54,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:45:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=219, Unknown=1, NotChecked=0, Total=272 [2022-03-20 13:45:54,214 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 13:45:56,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:45:58,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:46:00,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:46:02,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:46:06,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:46:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:46:07,038 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2022-03-20 13:46:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:46:07,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 63 [2022-03-20 13:46:07,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:46:07,040 INFO L225 Difference]: With dead ends: 117 [2022-03-20 13:46:07,040 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 13:46:07,040 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=81, Invalid=338, Unknown=1, NotChecked=0, Total=420 [2022-03-20 13:46:07,041 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 23 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:46:07,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 189 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 177 Invalid, 5 Unknown, 32 Unchecked, 10.8s Time] [2022-03-20 13:46:07,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 13:46:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-03-20 13:46:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 66 states have internal predecessors, (71), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 13:46:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2022-03-20 13:46:07,058 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 63 [2022-03-20 13:46:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:46:07,058 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2022-03-20 13:46:07,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-20 13:46:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2022-03-20 13:46:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 13:46:07,059 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:46:07,060 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:46:07,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 13:46:07,260 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:07,260 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:46:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:46:07,261 INFO L85 PathProgramCache]: Analyzing trace with hash -711069715, now seen corresponding path program 1 times [2022-03-20 13:46:07,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:07,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [659799618] [2022-03-20 13:46:07,265 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:46:07,265 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:46:07,265 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:46:07,265 INFO L85 PathProgramCache]: Analyzing trace with hash -711069715, now seen corresponding path program 2 times [2022-03-20 13:46:07,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:46:07,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844201373] [2022-03-20 13:46:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:46:07,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:46:07,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:46:07,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832679972] [2022-03-20 13:46:07,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:46:07,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:07,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:46:07,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:46:07,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 13:46:07,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:46:07,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:46:07,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 13:46:07,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:46:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 13:46:07,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:46:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-20 13:46:08,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:46:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844201373] [2022-03-20 13:46:08,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:46:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832679972] [2022-03-20 13:46:08,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832679972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:46:08,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:46:08,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 13:46:08,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:46:08,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [659799618] [2022-03-20 13:46:08,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [659799618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:46:08,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:46:08,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:46:08,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255060115] [2022-03-20 13:46:08,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:46:08,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:46:08,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:46:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:46:08,058 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 13:46:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:46:08,260 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2022-03-20 13:46:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:46:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 69 [2022-03-20 13:46:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:46:08,262 INFO L225 Difference]: With dead ends: 132 [2022-03-20 13:46:08,262 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 13:46:08,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:46:08,263 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:46:08,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 199 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:46:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 13:46:08,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-20 13:46:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 52 states have internal predecessors, (55), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 13:46:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-03-20 13:46:08,274 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 69 [2022-03-20 13:46:08,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:46:08,274 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-03-20 13:46:08,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 13:46:08,275 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-03-20 13:46:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 13:46:08,276 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:46:08,276 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:46:08,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 13:46:08,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:08,488 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:46:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:46:08,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1680019059, now seen corresponding path program 5 times [2022-03-20 13:46:08,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:08,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1364734170] [2022-03-20 13:46:08,492 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:46:08,492 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:46:08,492 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:46:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1680019059, now seen corresponding path program 6 times [2022-03-20 13:46:08,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:46:08,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660942093] [2022-03-20 13:46:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:46:08,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:46:08,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:46:08,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5535463] [2022-03-20 13:46:08,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:46:08,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:08,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:46:08,510 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:46:08,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 13:46:08,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 13:46:08,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:46:08,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 13:46:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:46:08,927 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:46:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-20 13:46:09,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:46:09,580 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:46:42,038 WARN L232 SmtUtils]: Spent 19.67s on a formula simplification. DAG size of input: 69 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:46:42,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:46:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660942093] [2022-03-20 13:46:42,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:46:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5535463] [2022-03-20 13:46:42,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5535463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:46:42,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:46:42,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 13:46:42,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:46:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1364734170] [2022-03-20 13:46:42,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1364734170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:46:42,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:46:42,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:46:42,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244597994] [2022-03-20 13:46:42,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:46:42,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:46:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:42,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:46:42,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=158, Unknown=1, NotChecked=0, Total=210 [2022-03-20 13:46:42,043 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 13:46:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:46:42,238 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2022-03-20 13:46:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:46:42,239 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 75 [2022-03-20 13:46:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:46:42,240 INFO L225 Difference]: With dead ends: 100 [2022-03-20 13:46:42,240 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 13:46:42,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=62, Invalid=209, Unknown=1, NotChecked=0, Total=272 [2022-03-20 13:46:42,241 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:46:42,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 130 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-03-20 13:46:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 13:46:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-03-20 13:46:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 64 states have internal predecessors, (67), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 13:46:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2022-03-20 13:46:42,263 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 75 [2022-03-20 13:46:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:46:42,264 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2022-03-20 13:46:42,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 13:46:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2022-03-20 13:46:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 13:46:42,267 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:46:42,267 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:46:42,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 13:46:42,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:42,471 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:46:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:46:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash -576191946, now seen corresponding path program 1 times [2022-03-20 13:46:42,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:42,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [120215106] [2022-03-20 13:46:42,481 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:46:42,481 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:46:42,481 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:46:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash -576191946, now seen corresponding path program 2 times [2022-03-20 13:46:42,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:46:42,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265672017] [2022-03-20 13:46:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:46:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:46:42,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:46:42,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463584341] [2022-03-20 13:46:42,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:46:42,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:42,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:46:42,509 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:46:42,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 13:46:42,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:46:42,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:46:42,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:46:42,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:46:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-20 13:46:42,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:46:42,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:46:42,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265672017] [2022-03-20 13:46:42,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:46:42,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463584341] [2022-03-20 13:46:42,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463584341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:46:42,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:46:42,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:46:42,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:46:42,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [120215106] [2022-03-20 13:46:42,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [120215106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:46:42,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:46:42,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:46:42,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691784425] [2022-03-20 13:46:42,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:46:42,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:46:42,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:46:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:46:42,801 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 13:46:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:46:42,906 INFO L93 Difference]: Finished difference Result 126 states and 150 transitions. [2022-03-20 13:46:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:46:42,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-20 13:46:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:46:42,909 INFO L225 Difference]: With dead ends: 126 [2022-03-20 13:46:42,910 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 13:46:42,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:46:42,912 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:46:42,913 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 114 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:46:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 13:46:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2022-03-20 13:46:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 55 states have internal predecessors, (57), 19 states have call successors, (19), 14 states have call predecessors, (19), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 13:46:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-03-20 13:46:42,929 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 80 [2022-03-20 13:46:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:46:42,930 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-03-20 13:46:42,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 13:46:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-03-20 13:46:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 13:46:42,931 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:46:42,931 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:46:42,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 13:46:43,155 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,SelfDestructingSolverStorable9 [2022-03-20 13:46:43,156 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:46:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:46:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash -182652584, now seen corresponding path program 3 times [2022-03-20 13:46:43,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:43,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [887832656] [2022-03-20 13:46:43,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:46:43,159 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:46:43,159 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:46:43,159 INFO L85 PathProgramCache]: Analyzing trace with hash -182652584, now seen corresponding path program 4 times [2022-03-20 13:46:43,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:46:43,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711633018] [2022-03-20 13:46:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:46:43,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:46:43,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:46:43,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773152393] [2022-03-20 13:46:43,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:46:43,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:43,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:46:43,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:46:43,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 13:46:43,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:46:43,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:46:43,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:46:43,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:46:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 13:46:43,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:46:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 13:46:43,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:46:43,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711633018] [2022-03-20 13:46:43,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:46:43,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773152393] [2022-03-20 13:46:43,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773152393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:46:43,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:46:43,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-03-20 13:46:43,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:46:43,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [887832656] [2022-03-20 13:46:43,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [887832656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:46:43,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:46:43,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 13:46:43,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149284281] [2022-03-20 13:46:43,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:46:43,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 13:46:43,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:43,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 13:46:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:46:43,607 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 13:46:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:46:43,636 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2022-03-20 13:46:43,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 13:46:43,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-03-20 13:46:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:46:43,639 INFO L225 Difference]: With dead ends: 95 [2022-03-20 13:46:43,639 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 13:46:43,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:46:43,640 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:46:43,640 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 82 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:46:43,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 13:46:43,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-20 13:46:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 19 states have call successors, (19), 14 states have call predecessors, (19), 13 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 13:46:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2022-03-20 13:46:43,654 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 86 [2022-03-20 13:46:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:46:43,655 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2022-03-20 13:46:43,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 13:46:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2022-03-20 13:46:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 13:46:43,656 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:46:43,656 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:46:43,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 13:46:43,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:43,872 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:46:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:46:43,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1256657556, now seen corresponding path program 7 times [2022-03-20 13:46:43,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:43,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [579738406] [2022-03-20 13:46:43,875 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:46:43,875 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:46:43,875 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:46:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1256657556, now seen corresponding path program 8 times [2022-03-20 13:46:43,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:46:43,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416936306] [2022-03-20 13:46:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:46:43,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:46:43,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:46:43,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128570361] [2022-03-20 13:46:43,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:46:43,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:43,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:46:43,894 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:46:43,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 13:46:43,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:46:43,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:46:43,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 13:46:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:46:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 13:46:44,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:47:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 13:47:07,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416936306] [2022-03-20 13:47:07,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128570361] [2022-03-20 13:47:07,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128570361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:47:07,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:47:07,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 13:47:07,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:47:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [579738406] [2022-03-20 13:47:07,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [579738406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:47:07,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:47:07,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:47:07,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686225048] [2022-03-20 13:47:07,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:47:07,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:47:07,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:47:07,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2022-03-20 13:47:07,476 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 13:47:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:47:07,713 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2022-03-20 13:47:07,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:47:07,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 88 [2022-03-20 13:47:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:47:07,715 INFO L225 Difference]: With dead ends: 160 [2022-03-20 13:47:07,715 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 13:47:07,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=64, Invalid=207, Unknown=1, NotChecked=0, Total=272 [2022-03-20 13:47:07,716 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:47:07,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 365 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:47:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 13:47:07,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2022-03-20 13:47:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 90 states have internal predecessors, (96), 28 states have call successors, (28), 22 states have call predecessors, (28), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 13:47:07,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2022-03-20 13:47:07,732 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 88 [2022-03-20 13:47:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:47:07,733 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2022-03-20 13:47:07,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 13:47:07,733 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2022-03-20 13:47:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 13:47:07,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:47:07,734 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:47:07,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 13:47:07,952 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,SelfDestructingSolverStorable11 [2022-03-20 13:47:07,953 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:47:07,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:47:07,953 INFO L85 PathProgramCache]: Analyzing trace with hash 921896973, now seen corresponding path program 9 times [2022-03-20 13:47:07,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:07,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [838702632] [2022-03-20 13:47:07,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:47:07,957 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:47:07,957 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:47:07,957 INFO L85 PathProgramCache]: Analyzing trace with hash 921896973, now seen corresponding path program 10 times [2022-03-20 13:47:07,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:47:07,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421667512] [2022-03-20 13:47:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:47:07,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:47:07,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:47:07,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101109840] [2022-03-20 13:47:07,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:47:07,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:47:07,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:47:07,971 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:47:07,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 13:47:08,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:47:08,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:47:08,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 13:47:08,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:47:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 126 proven. 48 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-20 13:47:08,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:47:08,932 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:47:09,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:09,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421667512] [2022-03-20 13:47:09,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:09,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101109840] [2022-03-20 13:47:09,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101109840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:47:09,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:47:09,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 13:47:09,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:47:09,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [838702632] [2022-03-20 13:47:09,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [838702632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:47:09,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:47:09,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:47:09,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952550621] [2022-03-20 13:47:09,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:47:09,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:47:09,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:47:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:47:09,152 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 13:47:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:47:10,215 INFO L93 Difference]: Finished difference Result 158 states and 177 transitions. [2022-03-20 13:47:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:47:10,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 93 [2022-03-20 13:47:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:47:10,217 INFO L225 Difference]: With dead ends: 158 [2022-03-20 13:47:10,217 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 13:47:10,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-20 13:47:10,218 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:47:10,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 454 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 453 Invalid, 0 Unknown, 41 Unchecked, 1.0s Time] [2022-03-20 13:47:10,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 13:47:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2022-03-20 13:47:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 100 states have internal predecessors, (104), 33 states have call successors, (33), 23 states have call predecessors, (33), 22 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 13:47:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 168 transitions. [2022-03-20 13:47:10,240 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 168 transitions. Word has length 93 [2022-03-20 13:47:10,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:47:10,241 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 168 transitions. [2022-03-20 13:47:10,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 13:47:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 168 transitions. [2022-03-20 13:47:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 13:47:10,242 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:47:10,242 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:47:10,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 13:47:10,455 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,SelfDestructingSolverStorable12 [2022-03-20 13:47:10,455 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:47:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:47:10,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2013246961, now seen corresponding path program 5 times [2022-03-20 13:47:10,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:10,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1250801975] [2022-03-20 13:47:10,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:47:10,458 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-03-20 13:47:10,458 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:47:10,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2013246961, now seen corresponding path program 6 times [2022-03-20 13:47:10,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:47:10,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588863826] [2022-03-20 13:47:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:47:10,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:47:10,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:47:10,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325315120] [2022-03-20 13:47:10,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:47:10,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:47:10,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:47:10,469 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:47:10,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 13:47:10,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 13:47:10,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:47:10,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 13:47:10,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:47:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 108 proven. 4 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 13:47:10,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:47:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-20 13:47:10,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:10,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588863826] [2022-03-20 13:47:10,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:10,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325315120] [2022-03-20 13:47:10,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325315120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:47:10,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:47:10,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 13:47:10,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:47:10,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1250801975] [2022-03-20 13:47:10,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1250801975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:47:10,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:47:10,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:47:10,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852263292] [2022-03-20 13:47:10,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:47:10,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:47:10,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:10,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:47:10,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:47:10,919 INFO L87 Difference]: Start difference. First operand 152 states and 168 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 13:47:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:47:11,061 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2022-03-20 13:47:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:47:11,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 99 [2022-03-20 13:47:11,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:47:11,061 INFO L225 Difference]: With dead ends: 152 [2022-03-20 13:47:11,062 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 13:47:11,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-20 13:47:11,063 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:47:11,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 113 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:47:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 13:47:11,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 13:47:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 13:47:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 13:47:11,064 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 99 [2022-03-20 13:47:11,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:47:11,064 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 13:47:11,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 13:47:11,064 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 13:47:11,064 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 13:47:11,066 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 13:47:11,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 13:47:11,279 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,SelfDestructingSolverStorable13 [2022-03-20 13:47:11,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 13:47:15,295 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-20 13:47:15,295 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-20 13:47:15,295 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-20 13:47:15,296 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-03-20 13:47:15,296 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-20 13:47:15,296 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-20 13:47:15,296 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-20 13:47:15,296 INFO L878 garLoopResultBuilder]: At program point L33-2(lines 33 41) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (let ((.cse3 (div main_~d~0 2))) (and (= (* main_~B~0 main_~p~0) main_~d~0) (= (mod (div main_~p~0 2) 2) 0) (<= .cse3 main_~r~0) .cse0 .cse1 (= (mod main_~p~0 2) 0) (<= 1 (div .cse3 2)) .cse2)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2))) [2022-03-20 13:47:15,296 INFO L885 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: true [2022-03-20 13:47:15,296 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 60) the Hoare annotation is: true [2022-03-20 13:47:15,296 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 60) the Hoare annotation is: true [2022-03-20 13:47:15,296 INFO L878 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= main_~d~0 main_~p~0) (= main_~B~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) [2022-03-20 13:47:15,297 INFO L878 garLoopResultBuilder]: At program point L44-1(line 44) the Hoare annotation is: (and (= main_~d~0 main_~p~0) (= main_~B~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) [2022-03-20 13:47:15,297 INFO L878 garLoopResultBuilder]: At program point L36(lines 33 41) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (let ((.cse3 (div main_~d~0 2))) (and (= (* main_~B~0 main_~p~0) main_~d~0) (= (mod (div main_~p~0 2) 2) 0) (<= .cse3 main_~r~0) .cse0 .cse1 (= (mod main_~p~0 2) 0) (<= 1 (div .cse3 2)) .cse2)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2))) [2022-03-20 13:47:15,297 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (let ((.cse3 (div main_~d~0 2))) (and (= (* main_~B~0 main_~p~0) main_~d~0) (= (mod (div main_~p~0 2) 2) 0) (<= .cse3 main_~r~0) .cse0 .cse1 (= (mod main_~p~0 2) 0) (<= 1 (div .cse3 2)) .cse2)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2))) [2022-03-20 13:47:15,297 INFO L878 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (let ((.cse3 (div main_~d~0 2))) (and (= (* main_~B~0 main_~p~0) main_~d~0) (= (mod (div main_~p~0 2) 2) 0) (<= .cse3 main_~r~0) .cse0 .cse1 (= (mod main_~p~0 2) 0) (<= 1 (div .cse3 2)) .cse2)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2))) [2022-03-20 13:47:15,297 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 60) the Hoare annotation is: true [2022-03-20 13:47:15,297 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) [2022-03-20 13:47:15,297 INFO L878 garLoopResultBuilder]: At program point L51(lines 51 54) the Hoare annotation is: (and (= main_~d~0 main_~p~0) (= main_~B~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) [2022-03-20 13:47:15,297 INFO L878 garLoopResultBuilder]: At program point L51-2(lines 22 60) the Hoare annotation is: (and (= main_~d~0 main_~p~0) (= main_~B~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) [2022-03-20 13:47:15,297 INFO L878 garLoopResultBuilder]: At program point L45(lines 43 55) the Hoare annotation is: (and (= main_~d~0 main_~p~0) (= main_~B~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) [2022-03-20 13:47:15,297 INFO L878 garLoopResultBuilder]: At program point L43-1(lines 43 55) the Hoare annotation is: (and (= main_~d~0 main_~p~0) (= main_~d~0 1) (= main_~B~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) [2022-03-20 13:47:15,298 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (let ((.cse3 (div main_~d~0 2))) (and (= (* main_~B~0 main_~p~0) main_~d~0) (= (mod (div main_~p~0 2) 2) 0) (<= .cse3 main_~r~0) .cse0 .cse1 (= (mod main_~p~0 2) 0) (<= 1 (div .cse3 2)) .cse2)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2))) [2022-03-20 13:47:15,298 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 13:47:15,298 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 13:47:15,298 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 13:47:15,298 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 13:47:15,298 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 13:47:15,298 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 13:47:15,298 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 13:47:15,298 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 13:47:15,298 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 13:47:15,298 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-20 13:47:15,298 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 13:47:15,298 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 13:47:15,299 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 13:47:15,301 INFO L719 BasicCegarLoop]: Path program histogram: [10, 6, 2, 2, 2, 2, 2, 2] [2022-03-20 13:47:15,302 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 13:47:15,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 01:47:15 BoogieIcfgContainer [2022-03-20 13:47:15,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 13:47:15,313 INFO L158 Benchmark]: Toolchain (without parser) took 92644.20ms. Allocated memory was 183.5MB in the beginning and 249.6MB in the end (delta: 66.1MB). Free memory was 134.2MB in the beginning and 213.2MB in the end (delta: -79.0MB). Peak memory consumption was 124.3MB. Max. memory is 8.0GB. [2022-03-20 13:47:15,313 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory was 150.3MB in the beginning and 150.3MB in the end (delta: 72.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 13:47:15,313 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.68ms. Allocated memory is still 183.5MB. Free memory was 134.0MB in the beginning and 159.8MB in the end (delta: -25.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 13:47:15,314 INFO L158 Benchmark]: Boogie Preprocessor took 37.39ms. Allocated memory is still 183.5MB. Free memory was 159.8MB in the beginning and 158.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 13:47:15,314 INFO L158 Benchmark]: RCFGBuilder took 258.53ms. Allocated memory is still 183.5MB. Free memory was 158.3MB in the beginning and 147.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 13:47:15,314 INFO L158 Benchmark]: TraceAbstraction took 92065.44ms. Allocated memory was 183.5MB in the beginning and 249.6MB in the end (delta: 66.1MB). Free memory was 147.3MB in the beginning and 213.2MB in the end (delta: -65.9MB). Peak memory consumption was 137.1MB. Max. memory is 8.0GB. [2022-03-20 13:47:15,315 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory was 150.3MB in the beginning and 150.3MB in the end (delta: 72.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 276.68ms. Allocated memory is still 183.5MB. Free memory was 134.0MB in the beginning and 159.8MB in the end (delta: -25.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.39ms. Allocated memory is still 183.5MB. Free memory was 159.8MB in the beginning and 158.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 258.53ms. Allocated memory is still 183.5MB. Free memory was 158.3MB in the beginning and 147.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 92065.44ms. Allocated memory was 183.5MB in the beginning and 249.6MB in the end (delta: 66.1MB). Free memory was 147.3MB in the beginning and 213.2MB in the end (delta: -65.9MB). Peak memory consumption was 137.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 92.0s, OverallIterations: 14, TraceHistogramMax: 16, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 15.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 271 SdHoareTripleChecker+Valid, 12.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 221 mSDsluCounter, 2243 SdHoareTripleChecker+Invalid, 12.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 113 IncrementalHoareTripleChecker+Unchecked, 1781 mSDsCounter, 217 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1899 IncrementalHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 217 mSolverCounterUnsat, 462 mSDtfsCounter, 1899 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1316 GetRequests, 1146 SyntacticMatches, 18 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 37.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=13, InterpolantAutomatonStates: 111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 37 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 29 LocationsWithAnnotation, 563 PreInvPairs, 795 NumberOfFragments, 577 HoareAnnotationTreeSize, 563 FomulaSimplifications, 1063 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 29 FomulaSimplificationsInter, 3707 FormulaSimplificationTreeSizeReductionInter, 3.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((q == 0 && B == 1) && B * q + r == A) && B == d) && p == 1) || (((((((B * p == d && p / 2 % 2 == 0) && d / 2 <= r) && q == 0) && B == 1) && p % 2 == 0) && 1 <= d / 2 / 2) && B * q + r == A)) || ((((B * 2 == d && p == 2) && q == 0) && B == 1) && B * q + r == A) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-20 13:47:15,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...