/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 23:00:55,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 23:00:55,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 23:00:55,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 23:00:55,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 23:00:55,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 23:00:55,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 23:00:55,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 23:00:55,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 23:00:55,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 23:00:55,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 23:00:55,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 23:00:55,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 23:00:55,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 23:00:55,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 23:00:55,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 23:00:55,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 23:00:55,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 23:00:55,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 23:00:55,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 23:00:55,671 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 23:00:55,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 23:00:55,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 23:00:55,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 23:00:55,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 23:00:55,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 23:00:55,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 23:00:55,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 23:00:55,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 23:00:55,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 23:00:55,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 23:00:55,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 23:00:55,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 23:00:55,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 23:00:55,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 23:00:55,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 23:00:55,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 23:00:55,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 23:00:55,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 23:00:55,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 23:00:55,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 23:00:55,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 23:00:55,696 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 23:00:55,702 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 23:00:55,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 23:00:55,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 23:00:55,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 23:00:55,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 23:00:55,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 23:00:55,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 23:00:55,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 23:00:55,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 23:00:55,716 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 23:00:55,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 23:00:55,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 23:00:55,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 23:00:55,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 23:00:55,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 23:00:55,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:00:55,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 23:00:55,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 23:00:55,717 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 23:00:55,717 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 23:00:55,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 23:00:55,717 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 23:00:55,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 23:00:55,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 23:00:55,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 23:00:55,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 23:00:55,905 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 23:00:55,906 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 23:00:55,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c [2022-04-06 23:00:55,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702ac5105/76f4b4e877294a09aabc2201cf3c5db2/FLAG7973a91fc [2022-04-06 23:00:56,321 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 23:00:56,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c [2022-04-06 23:00:56,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702ac5105/76f4b4e877294a09aabc2201cf3c5db2/FLAG7973a91fc [2022-04-06 23:00:56,342 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702ac5105/76f4b4e877294a09aabc2201cf3c5db2 [2022-04-06 23:00:56,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 23:00:56,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 23:00:56,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 23:00:56,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 23:00:56,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 23:00:56,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:00:56" (1/1) ... [2022-04-06 23:00:56,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c125919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:00:56, skipping insertion in model container [2022-04-06 23:00:56,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:00:56" (1/1) ... [2022-04-06 23:00:56,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 23:00:56,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 23:00:56,484 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c[538,551] [2022-04-06 23:00:56,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:00:56,519 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 23:00:56,528 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c[538,551] [2022-04-06 23:00:56,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:00:56,555 INFO L208 MainTranslator]: Completed translation [2022-04-06 23:00:56,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:00:56 WrapperNode [2022-04-06 23:00:56,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 23:00:56,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 23:00:56,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 23:00:56,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 23:00:56,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:00:56" (1/1) ... [2022-04-06 23:00:56,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:00:56" (1/1) ... [2022-04-06 23:00:56,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:00:56" (1/1) ... [2022-04-06 23:00:56,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:00:56" (1/1) ... [2022-04-06 23:00:56,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:00:56" (1/1) ... [2022-04-06 23:00:56,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:00:56" (1/1) ... [2022-04-06 23:00:56,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:00:56" (1/1) ... [2022-04-06 23:00:56,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 23:00:56,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 23:00:56,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 23:00:56,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 23:00:56,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:00:56" (1/1) ... [2022-04-06 23:00:56,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:00:56,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:00:56,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 23:00:56,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 23:00:56,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 23:00:56,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 23:00:56,643 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 23:00:56,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 23:00:56,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 23:00:56,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 23:00:56,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 23:00:56,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 23:00:56,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 23:00:56,685 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 23:00:56,686 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 23:00:56,822 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 23:00:56,832 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 23:00:56,832 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 23:00:56,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:00:56 BoogieIcfgContainer [2022-04-06 23:00:56,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 23:00:56,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 23:00:56,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 23:00:56,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 23:00:56,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:00:56" (1/3) ... [2022-04-06 23:00:56,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@925d125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:00:56, skipping insertion in model container [2022-04-06 23:00:56,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:00:56" (2/3) ... [2022-04-06 23:00:56,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@925d125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:00:56, skipping insertion in model container [2022-04-06 23:00:56,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:00:56" (3/3) ... [2022-04-06 23:00:56,851 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound50.c [2022-04-06 23:00:56,854 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 23:00:56,854 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 23:00:56,904 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 23:00:56,909 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 [2022-04-06 23:00:56,909 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 23:00:56,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 23:00:56,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 23:00:56,925 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:00:56,925 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:00:56,926 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:00:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:00:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2022-04-06 23:00:56,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:56,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1993611314] [2022-04-06 23:00:56,940 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:00:56,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 2 times [2022-04-06 23:00:56,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:00:56,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671011198] [2022-04-06 23:00:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:00:56,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:00:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:00:57,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:00:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:00:57,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:00:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:00:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:00:57,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:00:57,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671011198] [2022-04-06 23:00:57,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671011198] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:57,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:57,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:00:57,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:00:57,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1993611314] [2022-04-06 23:00:57,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1993611314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:57,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:57,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:00:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905433329] [2022-04-06 23:00:57,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:00:57,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 23:00:57,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:57,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 23:00:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 23:00:57,087 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:00:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:00:57,149 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-04-06 23:00:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 23:00:57,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 23:00:57,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:00:57,156 INFO L225 Difference]: With dead ends: 66 [2022-04-06 23:00:57,157 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 23:00:57,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 23:00:57,161 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:00:57,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:00:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 23:00:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-06 23:00:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:00:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-06 23:00:57,198 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-04-06 23:00:57,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:00:57,198 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-06 23:00:57,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:00:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-06 23:00:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 23:00:57,199 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:00:57,199 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:00:57,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 23:00:57,200 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:00:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:00:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2022-04-06 23:00:57,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:57,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [273983086] [2022-04-06 23:00:57,201 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:00:57,202 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 2 times [2022-04-06 23:00:57,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:00:57,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760631167] [2022-04-06 23:00:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:00:57,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:00:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:00:57,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:00:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:00:57,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:00:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:00:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:00:57,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:00:57,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760631167] [2022-04-06 23:00:57,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760631167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:57,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:57,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:00:57,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:00:57,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [273983086] [2022-04-06 23:00:57,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [273983086] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:57,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:57,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:00:57,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150467888] [2022-04-06 23:00:57,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:00:57,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:00:57,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:57,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:00:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:00:57,326 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:00:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:00:57,495 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-06 23:00:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:00:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 23:00:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:00:57,500 INFO L225 Difference]: With dead ends: 47 [2022-04-06 23:00:57,501 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 23:00:57,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:00:57,506 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:00:57,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 90 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:00:57,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 23:00:57,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-04-06 23:00:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:00:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-06 23:00:57,517 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-04-06 23:00:57,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:00:57,518 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-06 23:00:57,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:00:57,518 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-06 23:00:57,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 23:00:57,518 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:00:57,518 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:00:57,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 23:00:57,519 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:00:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:00:57,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2022-04-06 23:00:57,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:57,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831397366] [2022-04-06 23:00:57,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:00:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 2 times [2022-04-06 23:00:57,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:00:57,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763505068] [2022-04-06 23:00:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:00:57,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:00:57,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:00:57,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928986926] [2022-04-06 23:00:57,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:00:57,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:00:57,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:00:57,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:00:57,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 23:00:57,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 23:00:57,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:00:57,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 23:00:57,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:00:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:00:57,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:00:57,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:00:57,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763505068] [2022-04-06 23:00:57,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:00:57,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928986926] [2022-04-06 23:00:57,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928986926] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:57,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:57,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 23:00:57,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:00:57,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831397366] [2022-04-06 23:00:57,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831397366] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:57,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:57,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 23:00:57,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549362843] [2022-04-06 23:00:57,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:00:57,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 23:00:57,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:57,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 23:00:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 23:00:57,729 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 23:00:57,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:00:57,745 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-04-06 23:00:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 23:00:57,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-06 23:00:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:00:57,746 INFO L225 Difference]: With dead ends: 52 [2022-04-06 23:00:57,746 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 23:00:57,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 23:00:57,747 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:00:57,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:00:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 23:00:57,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 23:00:57,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:00:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-04-06 23:00:57,754 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-04-06 23:00:57,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:00:57,754 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-04-06 23:00:57,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 23:00:57,754 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-04-06 23:00:57,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 23:00:57,754 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:00:57,754 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:00:57,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 23:00:57,971 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 [2022-04-06 23:00:57,971 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:00:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:00:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2022-04-06 23:00:57,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:57,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2074074836] [2022-04-06 23:00:57,972 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:00:57,973 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 2 times [2022-04-06 23:00:57,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:00:57,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037143185] [2022-04-06 23:00:57,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:00:57,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:00:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:00:58,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:00:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:00:58,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:00:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:00:58,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 23:00:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:00:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:00:58,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:00:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037143185] [2022-04-06 23:00:58,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037143185] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:58,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:58,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:00:58,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:00:58,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2074074836] [2022-04-06 23:00:58,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2074074836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:58,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:58,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:00:58,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753878478] [2022-04-06 23:00:58,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:00:58,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:00:58,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:58,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:00:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:00:58,061 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 23:00:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:00:58,188 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-06 23:00:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:00:58,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 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 23 [2022-04-06 23:00:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:00:58,189 INFO L225 Difference]: With dead ends: 52 [2022-04-06 23:00:58,189 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 23:00:58,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:00:58,190 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:00:58,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:00:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 23:00:58,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-04-06 23:00:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:00:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-06 23:00:58,197 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-04-06 23:00:58,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:00:58,197 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-06 23:00:58,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 23:00:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-06 23:00:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 23:00:58,198 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:00:58,198 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:00:58,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 23:00:58,198 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:00:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:00:58,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2022-04-06 23:00:58,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:58,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [702447348] [2022-04-06 23:00:58,199 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:00:58,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 2 times [2022-04-06 23:00:58,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:00:58,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555855247] [2022-04-06 23:00:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:00:58,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:00:58,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:00:58,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968754739] [2022-04-06 23:00:58,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:00:58,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:00:58,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:00:58,209 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:00:58,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 23:00:58,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:00:58,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:00:58,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:00:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:00:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 23:00:58,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:00:58,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:00:58,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555855247] [2022-04-06 23:00:58,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:00:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968754739] [2022-04-06 23:00:58,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968754739] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:58,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:58,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:00:58,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:00:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [702447348] [2022-04-06 23:00:58,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [702447348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:58,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:58,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:00:58,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961895939] [2022-04-06 23:00:58,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:00:58,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:00:58,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:00:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:00:58,381 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-04-06 23:00:58,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:00:58,448 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-04-06 23:00:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:00:58,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 [2022-04-06 23:00:58,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:00:58,451 INFO L225 Difference]: With dead ends: 71 [2022-04-06 23:00:58,451 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 23:00:58,451 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 [2022-04-06 23:00:58,457 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:00:58,457 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 143 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:00:58,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 23:00:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 23:00:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 23:00:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-04-06 23:00:58,481 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-04-06 23:00:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:00:58,481 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-04-06 23:00:58,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-04-06 23:00:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-04-06 23:00:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 23:00:58,482 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:00:58,482 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:00:58,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 23:00:58,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:00:58,696 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:00:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:00:58,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2022-04-06 23:00:58,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:58,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536347129] [2022-04-06 23:00:58,697 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:00:58,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 2 times [2022-04-06 23:00:58,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:00:58,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850297068] [2022-04-06 23:00:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:00:58,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:00:58,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:00:58,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207095653] [2022-04-06 23:00:58,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:00:58,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:00:58,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:00:58,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:00:58,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 23:00:58,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:00:58,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:00:58,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:00:58,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:00:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 23:00:58,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:00:58,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:00:58,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850297068] [2022-04-06 23:00:58,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:00:58,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207095653] [2022-04-06 23:00:58,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207095653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:58,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:58,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:00:58,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:00:58,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536347129] [2022-04-06 23:00:58,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536347129] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:58,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:58,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:00:58,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397365225] [2022-04-06 23:00:58,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:00:58,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:00:58,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:58,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:00:58,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:00:58,855 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 23:00:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:00:58,884 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-04-06 23:00:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:00:58,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-04-06 23:00:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:00:58,885 INFO L225 Difference]: With dead ends: 76 [2022-04-06 23:00:58,885 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 23:00:58,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:00:58,886 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:00:58,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:00:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 23:00:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-06 23:00:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 23:00:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-04-06 23:00:58,894 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-04-06 23:00:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:00:58,894 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-04-06 23:00:58,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 23:00:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-04-06 23:00:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 23:00:58,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:00:58,895 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:00:58,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 23:00:59,114 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:00:59,114 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:00:59,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:00:59,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2022-04-06 23:00:59,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:59,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [198361258] [2022-04-06 23:00:59,115 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:00:59,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 2 times [2022-04-06 23:00:59,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:00:59,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816033883] [2022-04-06 23:00:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:00:59,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:00:59,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:00:59,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068115794] [2022-04-06 23:00:59,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:00:59,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:00:59,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:00:59,125 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:00:59,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 23:00:59,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:00:59,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:00:59,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:00:59,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:00:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 23:00:59,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:00:59,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:00:59,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816033883] [2022-04-06 23:00:59,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:00:59,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068115794] [2022-04-06 23:00:59,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068115794] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:59,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:59,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:00:59,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:00:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [198361258] [2022-04-06 23:00:59,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [198361258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:59,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:59,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:00:59,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120485547] [2022-04-06 23:00:59,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:00:59,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:00:59,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:59,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:00:59,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:00:59,257 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:00:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:00:59,304 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-04-06 23:00:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:00:59,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-06 23:00:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:00:59,305 INFO L225 Difference]: With dead ends: 82 [2022-04-06 23:00:59,305 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 23:00:59,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:00:59,305 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:00:59,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 118 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:00:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 23:00:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-04-06 23:00:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 states have internal predecessors, (52), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 23:00:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-04-06 23:00:59,313 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 36 [2022-04-06 23:00:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:00:59,313 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-04-06 23:00:59,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:00:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-04-06 23:00:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 23:00:59,328 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:00:59,328 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:00:59,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 23:00:59,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:00:59,529 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:00:59,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:00:59,529 INFO L85 PathProgramCache]: Analyzing trace with hash 817878903, now seen corresponding path program 1 times [2022-04-06 23:00:59,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:59,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1187691214] [2022-04-06 23:00:59,545 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:00:59,546 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:00:59,546 INFO L85 PathProgramCache]: Analyzing trace with hash 817878903, now seen corresponding path program 2 times [2022-04-06 23:00:59,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:00:59,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934585268] [2022-04-06 23:00:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:00:59,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:00:59,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:00:59,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559058369] [2022-04-06 23:00:59,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:00:59,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:00:59,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:00:59,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:00:59,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 23:00:59,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:00:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:00:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:00:59,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:00:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 23:00:59,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:00:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 23:00:59,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:00:59,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934585268] [2022-04-06 23:00:59,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:00:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559058369] [2022-04-06 23:00:59,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559058369] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:00:59,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:00:59,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 23:00:59,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:00:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1187691214] [2022-04-06 23:00:59,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1187691214] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:00:59,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:00:59,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:00:59,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235829432] [2022-04-06 23:00:59,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:00:59,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:00:59,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:00:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:00:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 23:00:59,813 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 23:00:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:00:59,840 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2022-04-06 23:00:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:00:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2022-04-06 23:00:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:00:59,842 INFO L225 Difference]: With dead ends: 96 [2022-04-06 23:00:59,842 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 23:00:59,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 23:00:59,843 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:00:59,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 138 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:00:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 23:00:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 23:00:59,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 23:00:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-04-06 23:00:59,850 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 43 [2022-04-06 23:00:59,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:00:59,851 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-04-06 23:00:59,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 23:00:59,851 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-04-06 23:00:59,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 23:00:59,851 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:00:59,852 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:00:59,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:00,072 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:00,072 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2022-04-06 23:01:00,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:00,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [105873602] [2022-04-06 23:01:00,076 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:00,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 2 times [2022-04-06 23:01:00,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:00,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156119861] [2022-04-06 23:01:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:00,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:00,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811149553] [2022-04-06 23:01:00,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:00,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:00,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:00,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:00,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 23:01:00,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:00,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 23:01:00,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 23:01:00,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 23:01:00,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156119861] [2022-04-06 23:01:00,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811149553] [2022-04-06 23:01:00,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811149553] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 23:01:00,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:01:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 23:01:00,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:00,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [105873602] [2022-04-06 23:01:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [105873602] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:00,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:01:00,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069103108] [2022-04-06 23:01:00,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:00,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:01:00,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:01:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:01:00,408 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:01:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:00,448 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2022-04-06 23:01:00,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:01:00,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-04-06 23:01:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:00,450 INFO L225 Difference]: With dead ends: 84 [2022-04-06 23:01:00,450 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 23:01:00,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 23:01:00,451 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:00,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 125 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:01:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 23:01:00,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2022-04-06 23:01:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.2) internal successors, (60), 53 states have internal predecessors, (60), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 23:01:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-04-06 23:01:00,464 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 46 [2022-04-06 23:01:00,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:00,465 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-04-06 23:01:00,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:01:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-04-06 23:01:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 23:01:00,467 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:00,467 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:00,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 23:01:00,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:00,684 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:00,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:00,685 INFO L85 PathProgramCache]: Analyzing trace with hash 967982746, now seen corresponding path program 1 times [2022-04-06 23:01:00,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:00,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [608379544] [2022-04-06 23:01:00,688 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:00,688 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:00,689 INFO L85 PathProgramCache]: Analyzing trace with hash 967982746, now seen corresponding path program 2 times [2022-04-06 23:01:00,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:00,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163560104] [2022-04-06 23:01:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:00,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:00,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:00,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816757793] [2022-04-06 23:01:00,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:00,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:00,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:00,714 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:00,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 23:01:00,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:00,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:00,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 23:01:00,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 23:01:00,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 23:01:00,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163560104] [2022-04-06 23:01:00,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816757793] [2022-04-06 23:01:00,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816757793] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:00,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:00,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 23:01:00,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:00,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [608379544] [2022-04-06 23:01:00,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [608379544] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:00,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:00,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:01:00,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747820709] [2022-04-06 23:01:00,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:00,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:01:00,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:00,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:01:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:01:00,961 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 23:01:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:00,994 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2022-04-06 23:01:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:01:00,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 59 [2022-04-06 23:01:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:00,995 INFO L225 Difference]: With dead ends: 110 [2022-04-06 23:01:00,995 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 23:01:00,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:01:00,995 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 14 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:00,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 128 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:01:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 23:01:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-04-06 23:01:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 65 states have internal predecessors, (73), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 23:01:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-04-06 23:01:01,004 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 59 [2022-04-06 23:01:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:01,004 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-04-06 23:01:01,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 23:01:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-04-06 23:01:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 23:01:01,005 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:01,005 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:01,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:01,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:01,222 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:01,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:01,223 INFO L85 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 3 times [2022-04-06 23:01:01,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:01,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [744913923] [2022-04-06 23:01:01,226 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:01,226 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:01,226 INFO L85 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 4 times [2022-04-06 23:01:01,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:01,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794130082] [2022-04-06 23:01:01,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:01,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:01,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:01,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774054095] [2022-04-06 23:01:01,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:01:01,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:01,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:01,234 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:01,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 23:01:01,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:01:01,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 23:01:01,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 23:01:01,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 23:01:01,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:01,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794130082] [2022-04-06 23:01:01,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:01,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774054095] [2022-04-06 23:01:01,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774054095] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:01,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:01,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 23:01:01,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:01,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [744913923] [2022-04-06 23:01:01,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [744913923] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:01,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:01,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:01:01,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530797275] [2022-04-06 23:01:01,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:01,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:01:01,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:01,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:01:01,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:01:01,468 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 23:01:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:01,506 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2022-04-06 23:01:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:01:01,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2022-04-06 23:01:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:01,508 INFO L225 Difference]: With dead ends: 132 [2022-04-06 23:01:01,508 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 23:01:01,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-06 23:01:01,508 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:01,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 146 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:01:01,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 23:01:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-04-06 23:01:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 64 states have (on average 1.171875) internal successors, (75), 67 states have internal predecessors, (75), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 23:01:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2022-04-06 23:01:01,516 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 61 [2022-04-06 23:01:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:01,516 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2022-04-06 23:01:01,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 23:01:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2022-04-06 23:01:01,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 23:01:01,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:01,517 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:01,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:01,734 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,SelfDestructingSolverStorable10 [2022-04-06 23:01:01,734 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:01,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:01,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 1 times [2022-04-06 23:01:01,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:01,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [281031752] [2022-04-06 23:01:01,737 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:01,737 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 2 times [2022-04-06 23:01:01,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:01,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275943247] [2022-04-06 23:01:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:01,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:01,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:01,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588020415] [2022-04-06 23:01:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:01,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:01,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:01,745 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:01,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 23:01:01,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:01,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:01,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 23:01:01,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 23:01:01,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:01:02,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:02,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275943247] [2022-04-06 23:01:02,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:02,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588020415] [2022-04-06 23:01:02,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588020415] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:02,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:02,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 23:01:02,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:02,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [281031752] [2022-04-06 23:01:02,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [281031752] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:02,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:02,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:01:02,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287589062] [2022-04-06 23:01:02,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:02,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:01:02,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:01:02,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 23:01:02,021 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 23:01:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:02,081 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2022-04-06 23:01:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:01:02,082 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2022-04-06 23:01:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:02,082 INFO L225 Difference]: With dead ends: 151 [2022-04-06 23:01:02,083 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 23:01:02,083 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-04-06 23:01:02,083 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 27 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:02,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 184 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:01:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 23:01:02,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2022-04-06 23:01:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.160919540229885) internal successors, (101), 90 states have internal predecessors, (101), 28 states have call successors, (28), 19 states have call predecessors, (28), 17 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 23:01:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2022-04-06 23:01:02,093 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 68 [2022-04-06 23:01:02,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:02,093 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2022-04-06 23:01:02,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 23:01:02,093 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2022-04-06 23:01:02,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 23:01:02,094 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:02,094 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:02,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:02,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:02,311 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:02,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2022-04-06 23:01:02,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:02,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1912242463] [2022-04-06 23:01:02,314 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:02,314 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:02,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 2 times [2022-04-06 23:01:02,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:02,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622581416] [2022-04-06 23:01:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:02,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:02,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:02,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452574308] [2022-04-06 23:01:02,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:02,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:02,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:02,322 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:02,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 23:01:02,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:02,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:02,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 23:01:02,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:01:02,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:01:04,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:04,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622581416] [2022-04-06 23:01:04,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:04,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452574308] [2022-04-06 23:01:04,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452574308] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:04,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:04,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 23:01:04,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1912242463] [2022-04-06 23:01:04,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1912242463] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:04,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:04,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 23:01:04,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167959469] [2022-04-06 23:01:04,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:04,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 23:01:04,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:04,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 23:01:04,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:01:04,013 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 23:01:04,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:04,179 INFO L93 Difference]: Finished difference Result 178 states and 213 transitions. [2022-04-06 23:01:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:01:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2022-04-06 23:01:04,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:04,180 INFO L225 Difference]: With dead ends: 178 [2022-04-06 23:01:04,180 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 23:01:04,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-04-06 23:01:04,181 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 12 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:04,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 234 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:01:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 23:01:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-04-06 23:01:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 96 states have internal predecessors, (108), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 23:01:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 162 transitions. [2022-04-06 23:01:04,191 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 162 transitions. Word has length 68 [2022-04-06 23:01:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:04,191 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 162 transitions. [2022-04-06 23:01:04,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 23:01:04,191 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 162 transitions. [2022-04-06 23:01:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 23:01:04,192 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:04,192 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:04,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 23:01:04,414 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,SelfDestructingSolverStorable12 [2022-04-06 23:01:04,415 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:04,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1390565976, now seen corresponding path program 3 times [2022-04-06 23:01:04,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:04,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1620698389] [2022-04-06 23:01:04,418 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:04,418 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:04,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1390565976, now seen corresponding path program 4 times [2022-04-06 23:01:04,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:04,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775929977] [2022-04-06 23:01:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:04,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:04,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:04,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890647822] [2022-04-06 23:01:04,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:01:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:04,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:04,430 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:04,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 23:01:04,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:01:04,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:04,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 23:01:04,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 23:01:05,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 23:01:10,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775929977] [2022-04-06 23:01:10,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890647822] [2022-04-06 23:01:10,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890647822] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:10,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:10,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-06 23:01:10,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:10,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1620698389] [2022-04-06 23:01:10,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1620698389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:10,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:10,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 23:01:10,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278941723] [2022-04-06 23:01:10,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:10,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 23:01:10,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:10,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 23:01:10,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-04-06 23:01:10,583 INFO L87 Difference]: Start difference. First operand 141 states and 162 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-04-06 23:01:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:11,192 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2022-04-06 23:01:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 23:01:11,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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 73 [2022-04-06 23:01:11,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:11,193 INFO L225 Difference]: With dead ends: 149 [2022-04-06 23:01:11,193 INFO L226 Difference]: Without dead ends: 147 [2022-04-06 23:01:11,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-04-06 23:01:11,194 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 14 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:11,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 224 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 261 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-04-06 23:01:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-06 23:01:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-04-06 23:01:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 96 states have (on average 1.15625) internal successors, (111), 100 states have internal predecessors, (111), 30 states have call successors, (30), 21 states have call predecessors, (30), 20 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 23:01:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2022-04-06 23:01:11,204 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 73 [2022-04-06 23:01:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:11,204 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2022-04-06 23:01:11,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-04-06 23:01:11,204 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2022-04-06 23:01:11,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 23:01:11,205 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:11,205 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:11,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:11,421 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,SelfDestructingSolverStorable13 [2022-04-06 23:01:11,421 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:11,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2022-04-06 23:01:11,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:11,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1856159698] [2022-04-06 23:01:11,424 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:11,424 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:11,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 2 times [2022-04-06 23:01:11,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:11,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129246417] [2022-04-06 23:01:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:11,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:11,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:11,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395884052] [2022-04-06 23:01:11,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:11,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:11,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:11,436 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:11,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 23:01:11,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:11,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:11,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 23:01:11,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:11,723 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:01:11,727 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:01:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 7 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-04-06 23:01:12,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:12,898 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:01:12,900 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:01:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-04-06 23:01:12,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129246417] [2022-04-06 23:01:12,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395884052] [2022-04-06 23:01:12,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395884052] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:12,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:12,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 23:01:12,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:12,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1856159698] [2022-04-06 23:01:12,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1856159698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:12,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:12,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:01:12,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022241167] [2022-04-06 23:01:12,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:12,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:01:12,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:12,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:01:12,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-04-06 23:01:12,998 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand has 11 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2022-04-06 23:01:15,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:01:22,329 WARN L232 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 59 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:01:22,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:22,609 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2022-04-06 23:01:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 23:01:22,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 79 [2022-04-06 23:01:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:22,610 INFO L225 Difference]: With dead ends: 164 [2022-04-06 23:01:22,610 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 23:01:22,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:01:22,611 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:22,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 245 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 1 Unknown, 40 Unchecked, 2.5s Time] [2022-04-06 23:01:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 23:01:22,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2022-04-06 23:01:22,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 103 states have (on average 1.174757281553398) internal successors, (121), 107 states have internal predecessors, (121), 33 states have call successors, (33), 22 states have call predecessors, (33), 21 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 23:01:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 185 transitions. [2022-04-06 23:01:22,628 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 185 transitions. Word has length 79 [2022-04-06 23:01:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:22,628 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 185 transitions. [2022-04-06 23:01:22,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2022-04-06 23:01:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 185 transitions. [2022-04-06 23:01:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 23:01:22,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:22,631 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:22,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:22,843 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,SelfDestructingSolverStorable14 [2022-04-06 23:01:22,844 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash 816704307, now seen corresponding path program 5 times [2022-04-06 23:01:22,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:22,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1484137094] [2022-04-06 23:01:22,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:22,847 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:22,848 INFO L85 PathProgramCache]: Analyzing trace with hash 816704307, now seen corresponding path program 6 times [2022-04-06 23:01:22,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:22,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977859031] [2022-04-06 23:01:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:22,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:22,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:22,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849983074] [2022-04-06 23:01:22,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:01:22,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:22,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:22,867 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:22,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 23:01:22,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 23:01:22,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:22,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 23:01:22,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 23:01:23,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 23:01:23,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977859031] [2022-04-06 23:01:23,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849983074] [2022-04-06 23:01:23,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849983074] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:23,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:23,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 23:01:23,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:23,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1484137094] [2022-04-06 23:01:23,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1484137094] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:23,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:23,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:01:23,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418268447] [2022-04-06 23:01:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:23,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:01:23,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:01:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 23:01:23,254 INFO L87 Difference]: Start difference. First operand 158 states and 185 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-04-06 23:01:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:23,366 INFO L93 Difference]: Finished difference Result 203 states and 247 transitions. [2022-04-06 23:01:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:01:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2022-04-06 23:01:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:23,368 INFO L225 Difference]: With dead ends: 203 [2022-04-06 23:01:23,368 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 23:01:23,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-04-06 23:01:23,369 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 28 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:23,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 148 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:01:23,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 23:01:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-04-06 23:01:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 109 states have internal predecessors, (123), 33 states have call successors, (33), 22 states have call predecessors, (33), 21 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 23:01:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 187 transitions. [2022-04-06 23:01:23,384 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 187 transitions. Word has length 79 [2022-04-06 23:01:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:23,384 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 187 transitions. [2022-04-06 23:01:23,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-04-06 23:01:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 187 transitions. [2022-04-06 23:01:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 23:01:23,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:23,385 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:23,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:23,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 23:01:23,600 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:23,600 INFO L85 PathProgramCache]: Analyzing trace with hash 435352067, now seen corresponding path program 3 times [2022-04-06 23:01:23,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:23,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1761256510] [2022-04-06 23:01:23,603 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:23,603 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash 435352067, now seen corresponding path program 4 times [2022-04-06 23:01:23,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:23,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854449742] [2022-04-06 23:01:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:23,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:23,612 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:23,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289146930] [2022-04-06 23:01:23,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:01:23,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:23,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:23,613 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:23,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 23:01:23,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:01:23,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:23,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 23:01:23,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 164 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 23:01:23,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 23:01:23,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:23,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854449742] [2022-04-06 23:01:23,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:23,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289146930] [2022-04-06 23:01:23,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289146930] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:23,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:23,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 23:01:23,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:23,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1761256510] [2022-04-06 23:01:23,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1761256510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:23,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:23,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 23:01:23,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32181494] [2022-04-06 23:01:23,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:23,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 23:01:23,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 23:01:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:01:23,977 INFO L87 Difference]: Start difference. First operand 160 states and 187 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-04-06 23:01:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:24,158 INFO L93 Difference]: Finished difference Result 226 states and 262 transitions. [2022-04-06 23:01:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:01:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 82 [2022-04-06 23:01:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:24,159 INFO L225 Difference]: With dead ends: 226 [2022-04-06 23:01:24,159 INFO L226 Difference]: Without dead ends: 211 [2022-04-06 23:01:24,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:01:24,160 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 36 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:24,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 217 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:01:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-04-06 23:01:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-04-06 23:01:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 139 states have (on average 1.158273381294964) internal successors, (161), 144 states have internal predecessors, (161), 41 states have call successors, (41), 29 states have call predecessors, (41), 27 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 23:01:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 240 transitions. [2022-04-06 23:01:24,179 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 240 transitions. Word has length 82 [2022-04-06 23:01:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:24,179 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 240 transitions. [2022-04-06 23:01:24,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-04-06 23:01:24,179 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 240 transitions. [2022-04-06 23:01:24,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 23:01:24,180 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:24,180 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:24,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:24,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:24,395 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:24,396 INFO L85 PathProgramCache]: Analyzing trace with hash 437079945, now seen corresponding path program 5 times [2022-04-06 23:01:24,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:24,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1626843134] [2022-04-06 23:01:24,399 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:24,399 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:24,399 INFO L85 PathProgramCache]: Analyzing trace with hash 437079945, now seen corresponding path program 6 times [2022-04-06 23:01:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:24,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793531173] [2022-04-06 23:01:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:24,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:24,404 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:24,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438901830] [2022-04-06 23:01:24,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:01:24,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:24,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:24,411 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:24,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 23:01:24,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 23:01:24,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:24,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:01:24,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 23:01:24,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 23:01:24,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:24,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793531173] [2022-04-06 23:01:24,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:24,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438901830] [2022-04-06 23:01:24,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438901830] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:24,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:24,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-04-06 23:01:24,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:24,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1626843134] [2022-04-06 23:01:24,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1626843134] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:24,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:24,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 23:01:24,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683730978] [2022-04-06 23:01:24,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:24,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 23:01:24,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:24,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 23:01:24,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:01:24,707 INFO L87 Difference]: Start difference. First operand 208 states and 240 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-06 23:01:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:24,772 INFO L93 Difference]: Finished difference Result 225 states and 264 transitions. [2022-04-06 23:01:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 23:01:24,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 82 [2022-04-06 23:01:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:24,773 INFO L225 Difference]: With dead ends: 225 [2022-04-06 23:01:24,773 INFO L226 Difference]: Without dead ends: 196 [2022-04-06 23:01:24,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:01:24,774 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 1 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:24,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 132 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:01:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-04-06 23:01:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2022-04-06 23:01:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 132 states have internal predecessors, (144), 39 states have call successors, (39), 28 states have call predecessors, (39), 26 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 23:01:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 219 transitions. [2022-04-06 23:01:24,788 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 219 transitions. Word has length 82 [2022-04-06 23:01:24,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:24,788 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 219 transitions. [2022-04-06 23:01:24,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-06 23:01:24,788 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 219 transitions. [2022-04-06 23:01:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 23:01:24,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:24,789 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:24,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:25,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 23:01:25,003 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:25,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:25,004 INFO L85 PathProgramCache]: Analyzing trace with hash 111833757, now seen corresponding path program 1 times [2022-04-06 23:01:25,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:25,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1890427293] [2022-04-06 23:01:25,006 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:25,006 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash 111833757, now seen corresponding path program 2 times [2022-04-06 23:01:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:25,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911926517] [2022-04-06 23:01:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:25,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:25,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896350008] [2022-04-06 23:01:25,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:25,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:25,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:25,014 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:25,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 23:01:25,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:25,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:25,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 23:01:25,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 23:01:25,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 23:01:25,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911926517] [2022-04-06 23:01:25,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896350008] [2022-04-06 23:01:25,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896350008] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:25,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:25,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-06 23:01:25,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1890427293] [2022-04-06 23:01:25,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1890427293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:25,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:25,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 23:01:25,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537262435] [2022-04-06 23:01:25,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:25,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 23:01:25,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:25,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 23:01:25,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 23:01:25,606 INFO L87 Difference]: Start difference. First operand 193 states and 219 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 23:01:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:25,850 INFO L93 Difference]: Finished difference Result 198 states and 223 transitions. [2022-04-06 23:01:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:01:25,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 84 [2022-04-06 23:01:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:25,852 INFO L225 Difference]: With dead ends: 198 [2022-04-06 23:01:25,852 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 23:01:25,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 23:01:25,852 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:25,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 242 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:01:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 23:01:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-04-06 23:01:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 109 states have internal predecessors, (121), 34 states have call successors, (34), 23 states have call predecessors, (34), 21 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 23:01:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2022-04-06 23:01:25,863 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 84 [2022-04-06 23:01:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:25,863 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2022-04-06 23:01:25,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 23:01:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2022-04-06 23:01:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 23:01:25,864 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:25,864 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:25,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:26,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:26,081 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:26,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1068167297, now seen corresponding path program 7 times [2022-04-06 23:01:26,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:26,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195470860] [2022-04-06 23:01:26,084 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:26,084 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:26,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1068167297, now seen corresponding path program 8 times [2022-04-06 23:01:26,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:26,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377885196] [2022-04-06 23:01:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:26,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:26,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:26,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085478951] [2022-04-06 23:01:26,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:26,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:26,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:26,097 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:26,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 23:01:26,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:26,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:26,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 23:01:26,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 23:01:26,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 23:01:33,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:33,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377885196] [2022-04-06 23:01:33,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:33,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085478951] [2022-04-06 23:01:33,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085478951] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:33,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:33,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 23:01:33,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:33,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195470860] [2022-04-06 23:01:33,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195470860] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:33,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:33,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 23:01:33,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29866154] [2022-04-06 23:01:33,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:33,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 23:01:33,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:33,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 23:01:33,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:01:33,418 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 23:01:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:33,888 INFO L93 Difference]: Finished difference Result 220 states and 267 transitions. [2022-04-06 23:01:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:01:33,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 86 [2022-04-06 23:01:33,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:33,890 INFO L225 Difference]: With dead ends: 220 [2022-04-06 23:01:33,890 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 23:01:33,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-04-06 23:01:33,890 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:33,890 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 249 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 23:01:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 23:01:33,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2022-04-06 23:01:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 116 states have internal predecessors, (130), 36 states have call successors, (36), 24 states have call predecessors, (36), 23 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 23:01:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 200 transitions. [2022-04-06 23:01:33,902 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 200 transitions. Word has length 86 [2022-04-06 23:01:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:33,902 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 200 transitions. [2022-04-06 23:01:33,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 23:01:33,902 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 200 transitions. [2022-04-06 23:01:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 23:01:33,903 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:33,903 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 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, 1, 1, 1, 1, 1] [2022-04-06 23:01:33,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:34,117 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:34,118 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:34,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1271087930, now seen corresponding path program 9 times [2022-04-06 23:01:34,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:34,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [986875688] [2022-04-06 23:01:34,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:34,120 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:34,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1271087930, now seen corresponding path program 10 times [2022-04-06 23:01:34,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:34,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651588661] [2022-04-06 23:01:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:34,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:34,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:34,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104539029] [2022-04-06 23:01:34,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:01:34,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:34,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:34,127 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:34,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 23:01:34,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:01:34,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:34,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 23:01:34,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 23:01:34,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 23:01:36,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651588661] [2022-04-06 23:01:36,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104539029] [2022-04-06 23:01:36,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104539029] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:36,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:36,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 23:01:36,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [986875688] [2022-04-06 23:01:36,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [986875688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:36,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:36,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 23:01:36,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964378859] [2022-04-06 23:01:36,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:36,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 23:01:36,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 23:01:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:01:36,484 INFO L87 Difference]: Start difference. First operand 172 states and 200 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 23:01:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:36,818 INFO L93 Difference]: Finished difference Result 212 states and 254 transitions. [2022-04-06 23:01:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:01:36,822 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 91 [2022-04-06 23:01:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:36,823 INFO L225 Difference]: With dead ends: 212 [2022-04-06 23:01:36,823 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 23:01:36,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-04-06 23:01:36,823 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 14 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:36,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 350 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 23:01:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 23:01:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2022-04-06 23:01:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 123 states have internal predecessors, (134), 38 states have call successors, (38), 25 states have call predecessors, (38), 24 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 23:01:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2022-04-06 23:01:36,865 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 91 [2022-04-06 23:01:36,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:36,865 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2022-04-06 23:01:36,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 23:01:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2022-04-06 23:01:36,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 23:01:36,866 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:36,866 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:36,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:37,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:37,096 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:37,096 INFO L85 PathProgramCache]: Analyzing trace with hash 114996177, now seen corresponding path program 7 times [2022-04-06 23:01:37,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:37,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [922164454] [2022-04-06 23:01:37,099 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:37,099 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:37,100 INFO L85 PathProgramCache]: Analyzing trace with hash 114996177, now seen corresponding path program 8 times [2022-04-06 23:01:37,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:37,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085113173] [2022-04-06 23:01:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:37,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:37,105 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:37,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083058567] [2022-04-06 23:01:37,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:37,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:37,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:37,107 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:37,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 23:01:37,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:37,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:37,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 23:01:37,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-04-06 23:01:37,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:01:37,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:37,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085113173] [2022-04-06 23:01:37,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:37,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083058567] [2022-04-06 23:01:37,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083058567] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:37,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:37,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 23:01:37,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:37,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [922164454] [2022-04-06 23:01:37,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [922164454] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:37,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:37,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 23:01:37,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383455621] [2022-04-06 23:01:37,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:37,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 23:01:37,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:37,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 23:01:37,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:01:37,488 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 23:01:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:37,574 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2022-04-06 23:01:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 23:01:37,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 97 [2022-04-06 23:01:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:37,576 INFO L225 Difference]: With dead ends: 225 [2022-04-06 23:01:37,576 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 23:01:37,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:01:37,578 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 27 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:37,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 169 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:01:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 23:01:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-04-06 23:01:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 125 states have internal predecessors, (136), 38 states have call successors, (38), 25 states have call predecessors, (38), 24 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 23:01:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 209 transitions. [2022-04-06 23:01:37,596 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 209 transitions. Word has length 97 [2022-04-06 23:01:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:37,596 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 209 transitions. [2022-04-06 23:01:37,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 23:01:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 209 transitions. [2022-04-06 23:01:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 23:01:37,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:37,602 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:37,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:37,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:37,820 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash -545719131, now seen corresponding path program 5 times [2022-04-06 23:01:37,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:37,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1055247888] [2022-04-06 23:01:37,823 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:37,823 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash -545719131, now seen corresponding path program 6 times [2022-04-06 23:01:37,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:37,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662668875] [2022-04-06 23:01:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:37,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:37,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633115191] [2022-04-06 23:01:37,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:01:37,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:37,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:37,829 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:37,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 23:01:37,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 23:01:37,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 23:01:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 296 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 23:01:38,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:01:38,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:38,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662668875] [2022-04-06 23:01:38,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:38,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633115191] [2022-04-06 23:01:38,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633115191] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:01:38,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:01:38,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 23:01:38,208 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:38,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1055247888] [2022-04-06 23:01:38,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1055247888] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:38,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:38,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 23:01:38,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873530314] [2022-04-06 23:01:38,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:38,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 23:01:38,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 23:01:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:01:38,209 INFO L87 Difference]: Start difference. First operand 182 states and 209 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (17), 8 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 23:01:38,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:38,389 INFO L93 Difference]: Finished difference Result 243 states and 275 transitions. [2022-04-06 23:01:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 23:01:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (17), 8 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 100 [2022-04-06 23:01:38,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:38,392 INFO L225 Difference]: With dead ends: 243 [2022-04-06 23:01:38,392 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 23:01:38,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:01:38,393 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 57 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:38,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 218 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:01:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 23:01:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-04-06 23:01:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 154 states have internal predecessors, (166), 45 states have call successors, (45), 32 states have call predecessors, (45), 30 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 23:01:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 252 transitions. [2022-04-06 23:01:38,435 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 252 transitions. Word has length 100 [2022-04-06 23:01:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:38,435 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 252 transitions. [2022-04-06 23:01:38,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (17), 8 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 23:01:38,435 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 252 transitions. [2022-04-06 23:01:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 23:01:38,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:38,436 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 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, 1, 1] [2022-04-06 23:01:38,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:38,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 23:01:38,651 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:38,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:38,652 INFO L85 PathProgramCache]: Analyzing trace with hash -543991253, now seen corresponding path program 11 times [2022-04-06 23:01:38,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:38,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1030375785] [2022-04-06 23:01:38,656 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:01:38,656 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:01:38,656 INFO L85 PathProgramCache]: Analyzing trace with hash -543991253, now seen corresponding path program 12 times [2022-04-06 23:01:38,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:38,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943382817] [2022-04-06 23:01:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:38,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:38,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226144481] [2022-04-06 23:01:38,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:01:38,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:38,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:38,684 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:01:38,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 23:01:38,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 23:01:38,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:38,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 23:01:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 23:01:39,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:03:00,476 WARN L232 SmtUtils]: Spent 21.01s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:04:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 23:04:07,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:04:07,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943382817] [2022-04-06 23:04:07,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:04:07,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226144481] [2022-04-06 23:04:07,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226144481] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:04:07,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:04:07,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-04-06 23:04:07,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:04:07,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1030375785] [2022-04-06 23:04:07,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1030375785] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:04:07,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:04:07,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 23:04:07,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637696562] [2022-04-06 23:04:07,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:04:07,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 23:04:07,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:07,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 23:04:07,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=421, Unknown=1, NotChecked=0, Total=506 [2022-04-06 23:04:07,223 INFO L87 Difference]: Start difference. First operand 224 states and 252 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:04:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:04:08,330 INFO L93 Difference]: Finished difference Result 237 states and 264 transitions. [2022-04-06 23:04:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 23:04:08,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2022-04-06 23:04:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:04:08,332 INFO L225 Difference]: With dead ends: 237 [2022-04-06 23:04:08,332 INFO L226 Difference]: Without dead ends: 221 [2022-04-06 23:04:08,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=101, Invalid=548, Unknown=1, NotChecked=0, Total=650 [2022-04-06 23:04:08,333 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 23:04:08,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 311 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 23:04:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-04-06 23:04:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-04-06 23:04:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 146 states have (on average 1.1164383561643836) internal successors, (163), 151 states have internal predecessors, (163), 44 states have call successors, (44), 32 states have call predecessors, (44), 30 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 23:04:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 247 transitions. [2022-04-06 23:04:08,349 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 247 transitions. Word has length 100 [2022-04-06 23:04:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:04:08,349 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 247 transitions. [2022-04-06 23:04:08,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:04:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 247 transitions. [2022-04-06 23:04:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 23:04:08,350 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:04:08,350 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:04:08,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 23:04:08,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-04-06 23:04:08,564 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:04:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:04:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash -391055071, now seen corresponding path program 13 times [2022-04-06 23:04:08,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:08,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1055069751] [2022-04-06 23:04:08,566 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:04:08,566 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:04:08,566 INFO L85 PathProgramCache]: Analyzing trace with hash -391055071, now seen corresponding path program 14 times [2022-04-06 23:04:08,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:04:08,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398727719] [2022-04-06 23:04:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:04:08,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:04:08,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:04:08,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465507196] [2022-04-06 23:04:08,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:04:08,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:04:08,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:04:08,585 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:04:08,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 23:04:08,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:04:08,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:04:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 23:04:08,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:04:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 23:04:09,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:04:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 23:04:17,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:04:17,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398727719] [2022-04-06 23:04:17,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:04:17,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465507196] [2022-04-06 23:04:17,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465507196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:04:17,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:04:17,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2022-04-06 23:04:17,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:04:17,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1055069751] [2022-04-06 23:04:17,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1055069751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:04:17,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:04:17,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 23:04:17,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652840238] [2022-04-06 23:04:17,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:04:17,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 23:04:17,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 23:04:17,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-04-06 23:04:17,516 INFO L87 Difference]: Start difference. First operand 221 states and 247 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 23:04:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:04:18,400 INFO L93 Difference]: Finished difference Result 280 states and 328 transitions. [2022-04-06 23:04:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 23:04:18,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-04-06 23:04:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:04:18,402 INFO L225 Difference]: With dead ends: 280 [2022-04-06 23:04:18,402 INFO L226 Difference]: Without dead ends: 235 [2022-04-06 23:04:18,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-04-06 23:04:18,403 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 39 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 23:04:18,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 361 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 23:04:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-04-06 23:04:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2022-04-06 23:04:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 153 states have (on average 1.1241830065359477) internal successors, (172), 158 states have internal predecessors, (172), 46 states have call successors, (46), 33 states have call predecessors, (46), 32 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 23:04:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 261 transitions. [2022-04-06 23:04:18,431 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 261 transitions. Word has length 104 [2022-04-06 23:04:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:04:18,432 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 261 transitions. [2022-04-06 23:04:18,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 23:04:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 261 transitions. [2022-04-06 23:04:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 23:04:18,434 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:04:18,434 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:04:18,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 23:04:18,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:04:18,650 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:04:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:04:18,650 INFO L85 PathProgramCache]: Analyzing trace with hash 979077220, now seen corresponding path program 15 times [2022-04-06 23:04:18,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:18,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543649486] [2022-04-06 23:04:18,653 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:04:18,653 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:04:18,654 INFO L85 PathProgramCache]: Analyzing trace with hash 979077220, now seen corresponding path program 16 times [2022-04-06 23:04:18,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:04:18,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950430430] [2022-04-06 23:04:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:04:18,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:04:18,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:04:18,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319471012] [2022-04-06 23:04:18,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:04:18,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:04:18,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:04:18,686 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:04:18,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 23:04:18,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:04:18,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:04:18,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 23:04:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:04:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 23:04:19,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:04:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2022-04-06 23:04:21,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:04:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950430430] [2022-04-06 23:04:21,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:04:21,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319471012] [2022-04-06 23:04:21,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319471012] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:04:21,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:04:21,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2022-04-06 23:04:21,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:04:21,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543649486] [2022-04-06 23:04:21,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543649486] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:04:21,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:04:21,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 23:04:21,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497009641] [2022-04-06 23:04:21,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:04:21,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 23:04:21,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:21,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 23:04:21,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:04:21,449 INFO L87 Difference]: Start difference. First operand 232 states and 261 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 23:04:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:04:21,939 INFO L93 Difference]: Finished difference Result 286 states and 340 transitions. [2022-04-06 23:04:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:04:21,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 109 [2022-04-06 23:04:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:04:21,941 INFO L225 Difference]: With dead ends: 286 [2022-04-06 23:04:21,941 INFO L226 Difference]: Without dead ends: 256 [2022-04-06 23:04:21,942 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 202 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:04:21,942 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 23 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:04:21,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 443 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 23:04:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-04-06 23:04:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2022-04-06 23:04:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 165 states have (on average 1.1333333333333333) internal successors, (187), 172 states have internal predecessors, (187), 51 states have call successors, (51), 34 states have call predecessors, (51), 33 states have return successors, (48), 43 states have call predecessors, (48), 48 states have call successors, (48) [2022-04-06 23:04:21,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 286 transitions. [2022-04-06 23:04:21,967 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 286 transitions. Word has length 109 [2022-04-06 23:04:21,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:04:21,967 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 286 transitions. [2022-04-06 23:04:21,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 23:04:21,967 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 286 transitions. [2022-04-06 23:04:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 23:04:21,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:04:21,991 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:04:22,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 23:04:22,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:04:22,192 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:04:22,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:04:22,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1412827450, now seen corresponding path program 3 times [2022-04-06 23:04:22,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:22,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1913919874] [2022-04-06 23:04:22,194 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:04:22,194 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:04:22,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1412827450, now seen corresponding path program 4 times [2022-04-06 23:04:22,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:04:22,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485983265] [2022-04-06 23:04:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:04:22,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:04:22,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:04:22,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994331615] [2022-04-06 23:04:22,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:04:22,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:04:22,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:04:22,200 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:04:22,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 23:04:22,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:04:22,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:04:22,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 23:04:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:04:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 23:04:23,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:04:31,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:04:31,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485983265] [2022-04-06 23:04:31,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:04:31,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994331615] [2022-04-06 23:04:31,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994331615] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 23:04:31,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:04:31,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 23:04:31,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:04:31,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1913919874] [2022-04-06 23:04:31,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1913919874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:04:31,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:04:31,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 23:04:31,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633552178] [2022-04-06 23:04:31,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:04:31,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 23:04:31,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:31,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 23:04:31,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-04-06 23:04:31,550 INFO L87 Difference]: Start difference. First operand 250 states and 286 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 23:04:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:04:32,950 INFO L93 Difference]: Finished difference Result 258 states and 293 transitions. [2022-04-06 23:04:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 23:04:32,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 111 [2022-04-06 23:04:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:04:32,952 INFO L225 Difference]: With dead ends: 258 [2022-04-06 23:04:32,953 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 23:04:32,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-04-06 23:04:32,953 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:04:32,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 437 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 23:04:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 23:04:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-04-06 23:04:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 137 states have (on average 1.1532846715328466) internal successors, (158), 143 states have internal predecessors, (158), 45 states have call successors, (45), 28 states have call predecessors, (45), 27 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 23:04:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 245 transitions. [2022-04-06 23:04:32,968 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 245 transitions. Word has length 111 [2022-04-06 23:04:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:04:32,968 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 245 transitions. [2022-04-06 23:04:32,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 23:04:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 245 transitions. [2022-04-06 23:04:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 23:04:32,969 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:04:32,969 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:04:32,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 23:04:33,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 23:04:33,179 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:04:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:04:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash 898486511, now seen corresponding path program 9 times [2022-04-06 23:04:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:33,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1044854476] [2022-04-06 23:04:33,181 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:04:33,182 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:04:33,182 INFO L85 PathProgramCache]: Analyzing trace with hash 898486511, now seen corresponding path program 10 times [2022-04-06 23:04:33,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:04:33,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196854944] [2022-04-06 23:04:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:04:33,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:04:33,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:04:33,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159040024] [2022-04-06 23:04:33,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:04:33,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:04:33,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:04:33,223 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:04:33,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 23:04:33,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:04:33,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:04:33,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 23:04:33,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:04:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 90 proven. 430 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-04-06 23:04:33,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:04:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 32 proven. 70 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 23:04:33,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:04:33,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196854944] [2022-04-06 23:04:33,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:04:33,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159040024] [2022-04-06 23:04:33,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159040024] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:04:33,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:04:33,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 23:04:33,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:04:33,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1044854476] [2022-04-06 23:04:33,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1044854476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:04:33,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:04:33,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 23:04:33,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648019766] [2022-04-06 23:04:33,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:04:33,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 23:04:33,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 23:04:33,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:04:33,691 INFO L87 Difference]: Start difference. First operand 210 states and 245 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 23:04:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:04:33,788 INFO L93 Difference]: Finished difference Result 255 states and 307 transitions. [2022-04-06 23:04:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 23:04:33,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 115 [2022-04-06 23:04:33,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:04:33,789 INFO L225 Difference]: With dead ends: 255 [2022-04-06 23:04:33,789 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 23:04:33,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-04-06 23:04:33,790 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 28 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:04:33,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 182 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:04:33,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 23:04:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-06 23:04:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 145 states have internal predecessors, (160), 45 states have call successors, (45), 28 states have call predecessors, (45), 27 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 23:04:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 247 transitions. [2022-04-06 23:04:33,816 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 247 transitions. Word has length 115 [2022-04-06 23:04:33,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:04:33,816 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 247 transitions. [2022-04-06 23:04:33,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 23:04:33,816 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 247 transitions. [2022-04-06 23:04:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 23:04:33,817 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:04:33,817 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:04:33,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 23:04:34,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 23:04:34,037 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:04:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:04:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1562534599, now seen corresponding path program 7 times [2022-04-06 23:04:34,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:34,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [853954272] [2022-04-06 23:04:34,039 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:04:34,039 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:04:34,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1562534599, now seen corresponding path program 8 times [2022-04-06 23:04:34,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:04:34,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389045821] [2022-04-06 23:04:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:04:34,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:04:34,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:04:34,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58857550] [2022-04-06 23:04:34,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:04:34,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:04:34,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:04:34,075 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:04:34,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 23:04:34,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:04:34,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:04:34,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 23:04:34,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:04:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 23:04:34,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:04:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 23:04:34,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:04:34,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389045821] [2022-04-06 23:04:34,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:04:34,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58857550] [2022-04-06 23:04:34,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58857550] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:04:34,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:04:34,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 23:04:34,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:04:34,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [853954272] [2022-04-06 23:04:34,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [853954272] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:04:34,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:04:34,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 23:04:34,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873880602] [2022-04-06 23:04:34,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:04:34,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 23:04:34,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 23:04:34,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:04:34,483 INFO L87 Difference]: Start difference. First operand 212 states and 247 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 23:04:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:04:34,633 INFO L93 Difference]: Finished difference Result 272 states and 312 transitions. [2022-04-06 23:04:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 23:04:34,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 118 [2022-04-06 23:04:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:04:34,635 INFO L225 Difference]: With dead ends: 272 [2022-04-06 23:04:34,635 INFO L226 Difference]: Without dead ends: 257 [2022-04-06 23:04:34,636 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=229, Unknown=0, NotChecked=0, Total=380 [2022-04-06 23:04:34,640 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 54 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:04:34,640 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 213 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:04:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-04-06 23:04:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2022-04-06 23:04:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 168 states have (on average 1.130952380952381) internal successors, (190), 174 states have internal predecessors, (190), 52 states have call successors, (52), 35 states have call predecessors, (52), 33 states have return successors, (48), 44 states have call predecessors, (48), 48 states have call successors, (48) [2022-04-06 23:04:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 290 transitions. [2022-04-06 23:04:34,667 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 290 transitions. Word has length 118 [2022-04-06 23:04:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:04:34,667 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 290 transitions. [2022-04-06 23:04:34,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 23:04:34,667 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 290 transitions. [2022-04-06 23:04:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 23:04:34,668 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:04:34,668 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:04:34,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 23:04:34,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 23:04:34,895 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:04:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:04:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1564262477, now seen corresponding path program 17 times [2022-04-06 23:04:34,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:34,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1132556204] [2022-04-06 23:04:34,898 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:04:34,898 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:04:34,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1564262477, now seen corresponding path program 18 times [2022-04-06 23:04:34,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:04:34,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142060060] [2022-04-06 23:04:34,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:04:34,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:04:34,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:04:34,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228128962] [2022-04-06 23:04:34,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:04:34,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:04:34,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:04:34,916 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:04:34,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 23:04:34,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 23:04:34,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:04:34,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 23:04:34,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:04:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 23:04:35,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:05:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 23:05:18,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:05:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142060060] [2022-04-06 23:05:18,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:05:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228128962] [2022-04-06 23:05:18,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228128962] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:05:18,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:05:18,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2022-04-06 23:05:18,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:05:18,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1132556204] [2022-04-06 23:05:18,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1132556204] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:05:18,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:05:18,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 23:05:18,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050907673] [2022-04-06 23:05:18,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:05:18,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 23:05:18,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:18,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 23:05:18,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-04-06 23:05:18,434 INFO L87 Difference]: Start difference. First operand 254 states and 290 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 23:05:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:05:19,204 INFO L93 Difference]: Finished difference Result 274 states and 310 transitions. [2022-04-06 23:05:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 23:05:19,205 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 118 [2022-04-06 23:05:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:05:19,206 INFO L225 Difference]: With dead ends: 274 [2022-04-06 23:05:19,206 INFO L226 Difference]: Without dead ends: 272 [2022-04-06 23:05:19,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 213 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-04-06 23:05:19,206 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 40 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 23:05:19,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 383 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 23:05:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-04-06 23:05:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2022-04-06 23:05:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 179 states have (on average 1.1284916201117319) internal successors, (202), 186 states have internal predecessors, (202), 53 states have call successors, (53), 38 states have call predecessors, (53), 36 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-06 23:05:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 304 transitions. [2022-04-06 23:05:19,225 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 304 transitions. Word has length 118 [2022-04-06 23:05:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:05:19,225 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 304 transitions. [2022-04-06 23:05:19,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 23:05:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 304 transitions. [2022-04-06 23:05:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 23:05:19,226 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:05:19,226 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:05:19,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 23:05:19,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:05:19,440 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:05:19,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:05:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash 152469059, now seen corresponding path program 19 times [2022-04-06 23:05:19,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:19,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1257996756] [2022-04-06 23:05:19,442 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:05:19,442 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:05:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash 152469059, now seen corresponding path program 20 times [2022-04-06 23:05:19,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:05:19,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704711833] [2022-04-06 23:05:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:05:19,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:05:19,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:05:19,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662909030] [2022-04-06 23:05:19,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:05:19,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:05:19,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:05:19,448 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:05:19,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 23:05:19,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:05:19,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:05:19,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 23:05:19,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:05:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 34 proven. 63 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 23:05:20,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:05:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 34 proven. 63 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 23:05:27,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:05:27,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704711833] [2022-04-06 23:05:27,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:05:27,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662909030] [2022-04-06 23:05:27,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662909030] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:05:27,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:05:27,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2022-04-06 23:05:27,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:05:27,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1257996756] [2022-04-06 23:05:27,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1257996756] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:05:27,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:05:27,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 23:05:27,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867106290] [2022-04-06 23:05:27,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:05:27,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 23:05:27,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:27,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 23:05:27,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-04-06 23:05:27,849 INFO L87 Difference]: Start difference. First operand 269 states and 304 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 23:05:28,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:05:28,909 INFO L93 Difference]: Finished difference Result 328 states and 385 transitions. [2022-04-06 23:05:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 23:05:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 122 [2022-04-06 23:05:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:05:28,921 INFO L225 Difference]: With dead ends: 328 [2022-04-06 23:05:28,921 INFO L226 Difference]: Without dead ends: 283 [2022-04-06 23:05:28,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-04-06 23:05:28,923 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 40 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 23:05:28,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 398 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 23:05:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-04-06 23:05:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2022-04-06 23:05:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 186 states have (on average 1.1344086021505377) internal successors, (211), 193 states have internal predecessors, (211), 55 states have call successors, (55), 39 states have call predecessors, (55), 38 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 23:05:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 318 transitions. [2022-04-06 23:05:28,944 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 318 transitions. Word has length 122 [2022-04-06 23:05:28,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:05:28,945 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 318 transitions. [2022-04-06 23:05:28,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 23:05:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 318 transitions. [2022-04-06 23:05:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 23:05:28,945 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:05:28,945 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:05:28,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 23:05:29,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:05:29,151 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:05:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:05:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1079646078, now seen corresponding path program 21 times [2022-04-06 23:05:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:29,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304630004] [2022-04-06 23:05:29,154 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:05:29,154 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:05:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1079646078, now seen corresponding path program 22 times [2022-04-06 23:05:29,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:05:29,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328847412] [2022-04-06 23:05:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:05:29,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:05:29,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:05:29,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889200996] [2022-04-06 23:05:29,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:05:29,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:05:29,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:05:29,162 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:05:29,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 23:05:29,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:05:29,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:05:29,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 23:05:29,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:05:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 86 proven. 65 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-04-06 23:05:39,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:05:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 86 proven. 65 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-04-06 23:05:48,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:05:48,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328847412] [2022-04-06 23:05:48,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:05:48,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889200996] [2022-04-06 23:05:48,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889200996] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:05:48,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:05:48,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-04-06 23:05:48,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:05:48,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304630004] [2022-04-06 23:05:48,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304630004] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:05:48,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:05:48,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 23:05:48,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930879085] [2022-04-06 23:05:48,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:05:48,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 23:05:48,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:48,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 23:05:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-04-06 23:05:48,421 INFO L87 Difference]: Start difference. First operand 280 states and 318 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-04-06 23:05:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:05:50,558 INFO L93 Difference]: Finished difference Result 286 states and 323 transitions. [2022-04-06 23:05:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 23:05:50,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 127 [2022-04-06 23:05:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:05:50,560 INFO L225 Difference]: With dead ends: 286 [2022-04-06 23:05:50,560 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 23:05:50,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-04-06 23:05:50,561 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 17 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:05:50,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 412 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 708 Invalid, 0 Unknown, 74 Unchecked, 1.0s Time] [2022-04-06 23:05:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 23:05:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2022-04-06 23:05:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 189 states have (on average 1.1322751322751323) internal successors, (214), 196 states have internal predecessors, (214), 55 states have call successors, (55), 40 states have call predecessors, (55), 39 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 23:05:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 321 transitions. [2022-04-06 23:05:50,584 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 321 transitions. Word has length 127 [2022-04-06 23:05:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:05:50,585 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 321 transitions. [2022-04-06 23:05:50,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-04-06 23:05:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 321 transitions. [2022-04-06 23:05:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 23:05:50,585 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:05:50,586 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:05:50,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 23:05:50,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:05:50,788 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:05:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:05:50,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2084819725, now seen corresponding path program 9 times [2022-04-06 23:05:50,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:50,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1026530612] [2022-04-06 23:05:50,790 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:05:50,790 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:05:50,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2084819725, now seen corresponding path program 10 times [2022-04-06 23:05:50,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:05:50,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572194747] [2022-04-06 23:05:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:05:50,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:05:50,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:05:50,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029903023] [2022-04-06 23:05:50,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:05:50,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:05:50,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:05:50,800 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:05:50,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 23:05:50,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:05:50,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:05:50,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 23:05:50,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:05:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 36 proven. 612 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 23:05:51,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:05:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 36 proven. 60 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 23:05:51,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:05:51,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572194747] [2022-04-06 23:05:51,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:05:51,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029903023] [2022-04-06 23:05:51,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029903023] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:05:51,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:05:51,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-06 23:05:51,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:05:51,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1026530612] [2022-04-06 23:05:51,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1026530612] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:05:51,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:05:51,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:05:51,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036947877] [2022-04-06 23:05:51,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:05:51,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:05:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:51,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:05:51,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-06 23:05:51,338 INFO L87 Difference]: Start difference. First operand 284 states and 321 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2022-04-06 23:05:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:05:51,622 INFO L93 Difference]: Finished difference Result 361 states and 406 transitions. [2022-04-06 23:05:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 23:05:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 132 [2022-04-06 23:05:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:05:51,624 INFO L225 Difference]: With dead ends: 361 [2022-04-06 23:05:51,624 INFO L226 Difference]: Without dead ends: 345 [2022-04-06 23:05:51,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=303, Unknown=0, NotChecked=0, Total=506 [2022-04-06 23:05:51,625 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 81 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:05:51,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 237 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:05:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-04-06 23:05:51,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 321. [2022-04-06 23:05:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 216 states have (on average 1.1203703703703705) internal successors, (242), 223 states have internal predecessors, (242), 60 states have call successors, (60), 46 states have call predecessors, (60), 44 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-04-06 23:05:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 358 transitions. [2022-04-06 23:05:51,652 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 358 transitions. Word has length 132 [2022-04-06 23:05:51,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:05:51,653 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 358 transitions. [2022-04-06 23:05:51,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2022-04-06 23:05:51,653 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 358 transitions. [2022-04-06 23:05:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 23:05:51,654 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:05:51,654 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:05:51,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 23:05:51,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-04-06 23:05:51,867 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:05:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:05:51,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2083091847, now seen corresponding path program 23 times [2022-04-06 23:05:51,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:51,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [981463303] [2022-04-06 23:05:51,870 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:05:51,870 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:05:51,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2083091847, now seen corresponding path program 24 times [2022-04-06 23:05:51,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:05:51,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558545417] [2022-04-06 23:05:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:05:51,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:05:51,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:05:51,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809407312] [2022-04-06 23:05:51,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:05:51,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:05:51,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:05:51,883 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:05:51,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 23:05:52,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 23:05:52,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:05:52,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 23:05:52,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:05:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 132 proven. 102 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2022-04-06 23:05:53,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:06:39,121 WARN L232 SmtUtils]: Spent 25.07s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:08:58,867 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse17 (div c_main_~d~0 2)) (.cse15 (< c_main_~d~0 0)) (.cse14 (= (mod c_main_~d~0 2) 0))) (let ((.cse16 (and .cse15 (not .cse14))) (.cse13 (+ .cse17 1)) (.cse4 (mod c_main_~A~0 4294967296)) (.cse18 (= (mod c_main_~p~0 2) 0)) (.cse19 (< c_main_~p~0 0)) (.cse10 (mod c_main_~B~0 4294967296)) (.cse12 (div c_main_~p~0 2))) (and (let ((.cse8 (* .cse10 .cse12))) (or (let ((.cse7 (= (mod .cse8 2) 0))) (let ((.cse1 (< .cse12 0)) (.cse0 (= (mod .cse12 2) 0)) (.cse2 (not .cse7)) (.cse6 (* (- 1) (div .cse8 2))) (.cse9 (div .cse12 2))) (and (or (and (not .cse0) .cse1) (let ((.cse5 (* (+ c_main_~q~0 .cse9) .cse10)) (.cse3 (< .cse8 0))) (and (or (and .cse2 .cse3) (= .cse4 (+ .cse5 .cse6 c_main_~r~0))) (or (= (+ (- 1) .cse5 .cse6 c_main_~r~0) .cse4) .cse7 (not .cse3))))) (or (not .cse1) .cse0 (let ((.cse11 (* (+ c_main_~q~0 .cse9 1) .cse10))) (and (or .cse2 (= (+ .cse11 .cse6 c_main_~r~0) .cse4)) (or .cse7 (= .cse4 (+ (- 1) .cse11 .cse6 c_main_~r~0))))))))) (and (or (not (= .cse13 .cse8)) .cse14 (not .cse15)) (or .cse16 (not (= .cse17 .cse8)))) (and (not .cse18) .cse19))) (let ((.cse28 (+ .cse12 1))) (let ((.cse20 (* .cse28 .cse10))) (or (and (or .cse16 (not (= .cse20 .cse17))) (or (not (= .cse13 .cse20)) .cse14)) (let ((.cse25 (= (mod .cse20 2) 0))) (let ((.cse21 (= (mod .cse28 2) 0)) (.cse22 (not .cse25)) (.cse23 (* (- 1) (div .cse20 2))) (.cse26 (div .cse28 2))) (and (or (not .cse21) (let ((.cse24 (* (+ c_main_~q~0 .cse26) .cse10))) (and (or .cse22 (= .cse4 (+ .cse23 .cse24 c_main_~r~0))) (or (= (+ (- 1) .cse23 .cse24 c_main_~r~0) .cse4) .cse25)))) (or .cse21 (let ((.cse27 (* (+ c_main_~q~0 .cse26 1) .cse10))) (and (or (= (+ .cse23 c_main_~r~0 .cse27) .cse4) .cse22) (or (= (+ (- 1) .cse23 c_main_~r~0 .cse27) .cse4) .cse25))))))) .cse18 (not .cse19))))))) is different from true [2022-04-06 23:12:40,155 WARN L232 SmtUtils]: Spent 59.49s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)