/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/egcd3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 10:34:37,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 10:34:37,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 10:34:37,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 10:34:37,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 10:34:37,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 10:34:37,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 10:34:37,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 10:34:37,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 10:34:37,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 10:34:37,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 10:34:37,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 10:34:37,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 10:34:37,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 10:34:37,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 10:34:37,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 10:34:37,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 10:34:37,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 10:34:37,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 10:34:37,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 10:34:37,413 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 10:34:37,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 10:34:37,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 10:34:37,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 10:34:37,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 10:34:37,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 10:34:37,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 10:34:37,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 10:34:37,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 10:34:37,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 10:34:37,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 10:34:37,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 10:34:37,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 10:34:37,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 10:34:37,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 10:34:37,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 10:34:37,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 10:34:37,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 10:34:37,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 10:34:37,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 10:34:37,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 10:34:37,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 10:34:37,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 10:34:37,439 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 10:34:37,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 10:34:37,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 10:34:37,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 10:34:37,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 10:34:37,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 10:34:37,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 10:34:37,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 10:34:37,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 10:34:37,442 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 10:34:37,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 10:34:37,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 10:34:37,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 10:34:37,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 10:34:37,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 10:34:37,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:34:37,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 10:34:37,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 10:34:37,443 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 10:34:37,443 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 10:34:37,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 10:34:37,443 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 10:34:37,443 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 10:34:37,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 10:34:37,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 10:34:37,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 10:34:37,642 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 10:34:37,643 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 10:34:37,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-03-19 10:34:37,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f514924/15da0317a3024a64a0a2aa40a1546678/FLAG1b28efa7c [2022-03-19 10:34:38,039 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 10:34:38,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2022-03-19 10:34:38,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f514924/15da0317a3024a64a0a2aa40a1546678/FLAG1b28efa7c [2022-03-19 10:34:38,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f514924/15da0317a3024a64a0a2aa40a1546678 [2022-03-19 10:34:38,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 10:34:38,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 10:34:38,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 10:34:38,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 10:34:38,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 10:34:38,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:34:38" (1/1) ... [2022-03-19 10:34:38,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ae49453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:38, skipping insertion in model container [2022-03-19 10:34:38,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:34:38" (1/1) ... [2022-03-19 10:34:38,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 10:34:38,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 10:34:38,617 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/egcd3-ll_unwindbound20.c[490,503] [2022-03-19 10:34:38,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:34:38,637 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 10:34:38,645 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/egcd3-ll_unwindbound20.c[490,503] [2022-03-19 10:34:38,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:34:38,659 INFO L208 MainTranslator]: Completed translation [2022-03-19 10:34:38,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:38 WrapperNode [2022-03-19 10:34:38,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 10:34:38,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 10:34:38,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 10:34:38,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 10:34:38,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:38" (1/1) ... [2022-03-19 10:34:38,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:38" (1/1) ... [2022-03-19 10:34:38,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:38" (1/1) ... [2022-03-19 10:34:38,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:38" (1/1) ... [2022-03-19 10:34:38,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:38" (1/1) ... [2022-03-19 10:34:38,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:38" (1/1) ... [2022-03-19 10:34:38,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:38" (1/1) ... [2022-03-19 10:34:38,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 10:34:38,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 10:34:38,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 10:34:38,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 10:34:38,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:38" (1/1) ... [2022-03-19 10:34:38,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:34:38,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:38,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 10:34:38,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 10:34:38,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 10:34:38,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 10:34:38,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 10:34:38,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 10:34:38,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 10:34:38,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 10:34:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 10:34:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 10:34:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 10:34:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 10:34:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 10:34:38,738 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 10:34:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 10:34:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 10:34:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 10:34:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 10:34:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 10:34:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 10:34:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 10:34:38,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 10:34:38,781 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 10:34:38,782 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 10:34:38,923 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 10:34:38,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 10:34:38,927 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 10:34:38,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:34:38 BoogieIcfgContainer [2022-03-19 10:34:38,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 10:34:38,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 10:34:38,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 10:34:38,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 10:34:38,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:34:38" (1/3) ... [2022-03-19 10:34:38,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de3565f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:34:38, skipping insertion in model container [2022-03-19 10:34:38,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:38" (2/3) ... [2022-03-19 10:34:38,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de3565f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:34:38, skipping insertion in model container [2022-03-19 10:34:38,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:34:38" (3/3) ... [2022-03-19 10:34:38,944 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.c [2022-03-19 10:34:38,947 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 10:34:38,948 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 10:34:38,992 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 10:34:38,996 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 10:34:38,997 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 10:34:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 10:34:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 10:34:39,011 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:39,011 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:39,011 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:39,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2022-03-19 10:34:39,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:39,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863510159] [2022-03-19 10:34:39,034 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 2 times [2022-03-19 10:34:39,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:39,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338086329] [2022-03-19 10:34:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:34:39,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 10:34:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:34:39,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 10:34:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:34:39,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 10:34:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:34:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:39,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:39,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338086329] [2022-03-19 10:34:39,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338086329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:39,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:39,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:34:39,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:39,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863510159] [2022-03-19 10:34:39,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863510159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:39,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:39,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:34:39,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897095767] [2022-03-19 10:34:39,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:39,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 10:34:39,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 10:34:39,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 10:34:39,222 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:39,292 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-03-19 10:34:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 10:34:39,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-19 10:34:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:39,309 INFO L225 Difference]: With dead ends: 74 [2022-03-19 10:34:39,309 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 10:34:39,312 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 10:34:39,316 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:39,317 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 10:34:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-19 10:34:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 10:34:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-03-19 10:34:39,344 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-03-19 10:34:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:39,344 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-03-19 10:34:39,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-03-19 10:34:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 10:34:39,345 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:39,345 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:39,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 10:34:39,346 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:39,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:39,346 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2022-03-19 10:34:39,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:39,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1735167469] [2022-03-19 10:34:39,347 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:39,347 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 2 times [2022-03-19 10:34:39,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:39,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773685801] [2022-03-19 10:34:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:39,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:39,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:39,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909058933] [2022-03-19 10:34:39,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:39,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:39,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:39,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:39,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 10:34:39,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 10:34:39,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:39,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 10:34:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:39,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:34:39,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:39,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773685801] [2022-03-19 10:34:39,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:39,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909058933] [2022-03-19 10:34:39,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909058933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:39,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:39,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:34:39,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1735167469] [2022-03-19 10:34:39,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1735167469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:39,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:39,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:34:39,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276584961] [2022-03-19 10:34:39,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:39,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 10:34:39,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 10:34:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:34:39,519 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:39,544 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-03-19 10:34:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 10:34:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 10:34:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:39,547 INFO L225 Difference]: With dead ends: 44 [2022-03-19 10:34:39,547 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 10:34:39,547 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:34:39,548 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:39,548 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:39,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 10:34:39,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 10:34:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 10:34:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-19 10:34:39,555 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-03-19 10:34:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:39,556 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-19 10:34:39,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-19 10:34:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 10:34:39,557 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:39,557 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:39,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:39,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:39,760 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:39,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2022-03-19 10:34:39,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:39,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1588528362] [2022-03-19 10:34:39,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:39,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 2 times [2022-03-19 10:34:39,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:39,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136083165] [2022-03-19 10:34:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:39,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:39,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:39,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375829532] [2022-03-19 10:34:39,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:39,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:39,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:39,774 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:39,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 10:34:39,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 10:34:39,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:34:39,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:39,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:34:39,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:39,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136083165] [2022-03-19 10:34:39,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:39,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375829532] [2022-03-19 10:34:39,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375829532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:39,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:39,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:34:39,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1588528362] [2022-03-19 10:34:39,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1588528362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:39,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:39,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:34:39,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217969596] [2022-03-19 10:34:39,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:39,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:34:39,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:39,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:34:39,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:34:39,978 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 10:34:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:40,059 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-03-19 10:34:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:34:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-19 10:34:40,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:40,064 INFO L225 Difference]: With dead ends: 57 [2022-03-19 10:34:40,064 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 10:34:40,066 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:34:40,071 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:40,072 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 192 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 10:34:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-19 10:34:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 10:34:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-03-19 10:34:40,092 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 24 [2022-03-19 10:34:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:40,092 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-03-19 10:34:40,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 10:34:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-03-19 10:34:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 10:34:40,093 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:40,093 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:40,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:40,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 10:34:40,295 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:40,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:40,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2022-03-19 10:34:40,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:40,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1971749144] [2022-03-19 10:34:40,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:40,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 2 times [2022-03-19 10:34:40,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:40,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097234335] [2022-03-19 10:34:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:40,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:40,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:40,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714524583] [2022-03-19 10:34:40,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:40,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:40,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:40,337 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:40,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 10:34:40,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:40,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 10:34:40,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:40,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:34:40,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:40,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097234335] [2022-03-19 10:34:40,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:40,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714524583] [2022-03-19 10:34:40,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714524583] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:40,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:40,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:34:40,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:40,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1971749144] [2022-03-19 10:34:40,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1971749144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:40,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:40,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:34:40,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080410414] [2022-03-19 10:34:40,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:40,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:34:40,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:40,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:34:40,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:34:40,480 INFO L87 Difference]: Start difference. First operand 53 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:40,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:40,508 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2022-03-19 10:34:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:34:40,508 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-19 10:34:40,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:40,511 INFO L225 Difference]: With dead ends: 77 [2022-03-19 10:34:40,511 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 10:34:40,511 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:34:40,513 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:40,514 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 10:34:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 10:34:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 10:34:40,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-03-19 10:34:40,535 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-03-19 10:34:40,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:40,535 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-03-19 10:34:40,536 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-03-19 10:34:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 10:34:40,538 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:40,538 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:40,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-19 10:34:40,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:40,744 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:40,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:40,744 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2022-03-19 10:34:40,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:40,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1273679917] [2022-03-19 10:34:40,745 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:40,745 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 2 times [2022-03-19 10:34:40,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:40,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981561300] [2022-03-19 10:34:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:40,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:40,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:40,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420235025] [2022-03-19 10:34:40,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:40,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:40,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:40,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:40,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 10:34:40,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:40,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:40,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:34:40,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:40,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:40,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:40,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981561300] [2022-03-19 10:34:40,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:40,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420235025] [2022-03-19 10:34:40,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420235025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:40,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:40,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 10:34:40,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:40,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1273679917] [2022-03-19 10:34:40,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1273679917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:40,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:40,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:34:40,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857798450] [2022-03-19 10:34:40,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:40,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:34:40,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:40,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:34:40,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:34:40,943 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:40,980 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2022-03-19 10:34:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 10:34:40,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-03-19 10:34:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:40,983 INFO L225 Difference]: With dead ends: 67 [2022-03-19 10:34:40,983 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 10:34:40,984 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:34:40,984 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:40,984 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 10:34:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-19 10:34:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 10:34:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2022-03-19 10:34:40,998 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2022-03-19 10:34:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:40,998 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2022-03-19 10:34:40,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2022-03-19 10:34:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 10:34:41,000 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:41,000 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 10:34:41,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:41,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:41,212 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2022-03-19 10:34:41,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:41,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [915508793] [2022-03-19 10:34:41,213 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 2 times [2022-03-19 10:34:41,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:41,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586173348] [2022-03-19 10:34:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:41,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:41,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:41,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245354562] [2022-03-19 10:34:41,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:41,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:41,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:41,225 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:41,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 10:34:41,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:41,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:41,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:34:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 10:34:41,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 10:34:41,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:41,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586173348] [2022-03-19 10:34:41,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:41,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245354562] [2022-03-19 10:34:41,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245354562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:41,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:41,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 10:34:41,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:41,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [915508793] [2022-03-19 10:34:41,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [915508793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:41,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:41,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:34:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528927339] [2022-03-19 10:34:41,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:41,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:34:41,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:34:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:34:41,414 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:41,537 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2022-03-19 10:34:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:34:41,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-19 10:34:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:41,539 INFO L225 Difference]: With dead ends: 138 [2022-03-19 10:34:41,539 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 10:34:41,539 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:34:41,540 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 115 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:41,540 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 353 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 10:34:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2022-03-19 10:34:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 10:34:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2022-03-19 10:34:41,562 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2022-03-19 10:34:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:41,562 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2022-03-19 10:34:41,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2022-03-19 10:34:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 10:34:41,563 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:41,563 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 10:34:41,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:41,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:41,775 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:41,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:41,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2022-03-19 10:34:41,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:41,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [587161372] [2022-03-19 10:34:41,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:41,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 2 times [2022-03-19 10:34:41,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:41,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103614146] [2022-03-19 10:34:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:41,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:41,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:41,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936411909] [2022-03-19 10:34:41,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:41,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:41,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:41,790 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:41,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 10:34:41,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:41,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:41,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:34:41,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:41,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:34:41,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:41,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103614146] [2022-03-19 10:34:41,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:41,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936411909] [2022-03-19 10:34:41,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936411909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:41,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:41,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:34:41,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:41,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [587161372] [2022-03-19 10:34:41,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [587161372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:41,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:41,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:34:41,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701694980] [2022-03-19 10:34:41,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:41,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:34:41,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:41,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:34:41,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:34:41,892 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:41,916 INFO L93 Difference]: Finished difference Result 127 states and 178 transitions. [2022-03-19 10:34:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:34:41,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-03-19 10:34:41,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:41,923 INFO L225 Difference]: With dead ends: 127 [2022-03-19 10:34:41,923 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 10:34:41,924 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:34:41,925 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:41,925 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 165 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:41,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 10:34:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-19 10:34:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 10:34:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 124 transitions. [2022-03-19 10:34:41,939 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 124 transitions. Word has length 35 [2022-03-19 10:34:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:41,939 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 124 transitions. [2022-03-19 10:34:41,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 124 transitions. [2022-03-19 10:34:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 10:34:41,941 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:41,941 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-03-19 10:34:41,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:42,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:42,160 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:42,161 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2022-03-19 10:34:42,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:42,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813409021] [2022-03-19 10:34:42,161 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:42,161 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 2 times [2022-03-19 10:34:42,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:42,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958835296] [2022-03-19 10:34:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:42,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:42,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:42,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850766441] [2022-03-19 10:34:42,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:42,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:42,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:42,185 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:42,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 10:34:42,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:42,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:42,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 10:34:42,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:42,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:42,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:42,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958835296] [2022-03-19 10:34:42,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:42,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850766441] [2022-03-19 10:34:42,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850766441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:42,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:42,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 10:34:42,391 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:42,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813409021] [2022-03-19 10:34:42,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813409021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:42,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:42,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 10:34:42,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751375766] [2022-03-19 10:34:42,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:42,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 10:34:42,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:42,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 10:34:42,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:34:42,392 INFO L87 Difference]: Start difference. First operand 90 states and 124 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:42,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:42,440 INFO L93 Difference]: Finished difference Result 163 states and 227 transitions. [2022-03-19 10:34:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:34:42,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-19 10:34:42,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:42,441 INFO L225 Difference]: With dead ends: 163 [2022-03-19 10:34:42,441 INFO L226 Difference]: Without dead ends: 112 [2022-03-19 10:34:42,442 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-19 10:34:42,442 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:42,443 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 163 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-19 10:34:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-19 10:34:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 10:34:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2022-03-19 10:34:42,452 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 36 [2022-03-19 10:34:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:42,453 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2022-03-19 10:34:42,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2022-03-19 10:34:42,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 10:34:42,453 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:42,453 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 10:34:42,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:42,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:42,672 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2022-03-19 10:34:42,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:42,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [934961137] [2022-03-19 10:34:42,673 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 2 times [2022-03-19 10:34:42,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:42,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818985626] [2022-03-19 10:34:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:42,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:42,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:42,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80957229] [2022-03-19 10:34:42,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:42,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:42,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:42,693 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:42,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 10:34:42,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:42,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 10:34:42,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 10:34:42,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:43,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:43,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818985626] [2022-03-19 10:34:43,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:43,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80957229] [2022-03-19 10:34:43,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80957229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:43,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:43,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-19 10:34:43,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:43,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [934961137] [2022-03-19 10:34:43,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [934961137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:43,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:43,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:34:43,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944745439] [2022-03-19 10:34:43,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:43,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:34:43,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:43,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:34:43,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:34:43,017 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:43,123 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2022-03-19 10:34:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:34:43,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-19 10:34:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:43,125 INFO L225 Difference]: With dead ends: 154 [2022-03-19 10:34:43,125 INFO L226 Difference]: Without dead ends: 152 [2022-03-19 10:34:43,125 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-19 10:34:43,127 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 61 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:43,127 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 375 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-19 10:34:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-03-19 10:34:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-19 10:34:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2022-03-19 10:34:43,142 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2022-03-19 10:34:43,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:43,143 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2022-03-19 10:34:43,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2022-03-19 10:34:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 10:34:43,144 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:43,145 INFO L500 BasicCegarLoop]: trace histogram [3, 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] [2022-03-19 10:34:43,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:43,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 10:34:43,355 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:43,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:43,356 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 3 times [2022-03-19 10:34:43,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:43,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [861208481] [2022-03-19 10:34:43,356 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:43,356 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 4 times [2022-03-19 10:34:43,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:43,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656914177] [2022-03-19 10:34:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:43,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:43,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:43,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886625953] [2022-03-19 10:34:43,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:34:43,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:43,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:43,369 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:43,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 10:34:43,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:34:43,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:43,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 10:34:43,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:43,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:34:43,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:43,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656914177] [2022-03-19 10:34:43,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:43,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886625953] [2022-03-19 10:34:43,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886625953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:43,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:43,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:34:43,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:43,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [861208481] [2022-03-19 10:34:43,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [861208481] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:43,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:43,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:34:43,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394036807] [2022-03-19 10:34:43,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:43,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:34:43,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:34:43,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:34:43,458 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 10:34:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:43,524 INFO L93 Difference]: Finished difference Result 300 states and 442 transitions. [2022-03-19 10:34:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:34:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-03-19 10:34:43,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:43,526 INFO L225 Difference]: With dead ends: 300 [2022-03-19 10:34:43,526 INFO L226 Difference]: Without dead ends: 249 [2022-03-19 10:34:43,526 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 10:34:43,526 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 29 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:43,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 202 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-19 10:34:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 175. [2022-03-19 10:34:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 137 states have internal predecessors, (183), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-19 10:34:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 239 transitions. [2022-03-19 10:34:43,567 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 239 transitions. Word has length 37 [2022-03-19 10:34:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:43,567 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 239 transitions. [2022-03-19 10:34:43,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 10:34:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 239 transitions. [2022-03-19 10:34:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 10:34:43,568 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:43,568 INFO L500 BasicCegarLoop]: trace histogram [3, 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, 1] [2022-03-19 10:34:43,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:43,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 10:34:43,787 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:43,788 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2022-03-19 10:34:43,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:43,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970268661] [2022-03-19 10:34:43,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:43,788 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 2 times [2022-03-19 10:34:43,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:43,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148414089] [2022-03-19 10:34:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:43,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:43,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:43,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403227534] [2022-03-19 10:34:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:43,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:43,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:43,797 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:43,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 10:34:43,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:43,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:43,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 10:34:43,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 10:34:43,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:34:43,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:43,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148414089] [2022-03-19 10:34:43,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:43,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403227534] [2022-03-19 10:34:43,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403227534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:43,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:43,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:34:43,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:43,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970268661] [2022-03-19 10:34:43,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970268661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:43,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:43,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:34:43,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249467543] [2022-03-19 10:34:43,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:43,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:34:43,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:34:43,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:34:43,926 INFO L87 Difference]: Start difference. First operand 175 states and 239 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:34:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:44,009 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2022-03-19 10:34:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:34:44,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-19 10:34:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:44,010 INFO L225 Difference]: With dead ends: 193 [2022-03-19 10:34:44,010 INFO L226 Difference]: Without dead ends: 191 [2022-03-19 10:34:44,011 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-19 10:34:44,011 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:44,011 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 270 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-19 10:34:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-03-19 10:34:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 146 states have internal predecessors, (194), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 10:34:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 258 transitions. [2022-03-19 10:34:44,025 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 258 transitions. Word has length 39 [2022-03-19 10:34:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:44,025 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 258 transitions. [2022-03-19 10:34:44,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:34:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 258 transitions. [2022-03-19 10:34:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 10:34:44,026 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:44,026 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 10:34:44,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:44,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 10:34:44,239 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2022-03-19 10:34:44,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:44,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [910546063] [2022-03-19 10:34:44,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 2 times [2022-03-19 10:34:44,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:44,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606897897] [2022-03-19 10:34:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:44,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:44,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:44,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70309810] [2022-03-19 10:34:44,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:44,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:44,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:44,248 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:44,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 10:34:44,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:44,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 10:34:44,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:44,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:44,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:44,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606897897] [2022-03-19 10:34:44,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:44,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70309810] [2022-03-19 10:34:44,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70309810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:44,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:44,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-03-19 10:34:44,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:44,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [910546063] [2022-03-19 10:34:44,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [910546063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:44,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:44,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:34:44,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534590181] [2022-03-19 10:34:44,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:44,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:34:44,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:34:44,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:34:44,677 INFO L87 Difference]: Start difference. First operand 190 states and 258 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 10:34:44,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:44,822 INFO L93 Difference]: Finished difference Result 199 states and 266 transitions. [2022-03-19 10:34:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:34:44,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-03-19 10:34:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:44,823 INFO L225 Difference]: With dead ends: 199 [2022-03-19 10:34:44,823 INFO L226 Difference]: Without dead ends: 197 [2022-03-19 10:34:44,823 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:34:44,824 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 72 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:44,824 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 385 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-19 10:34:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-03-19 10:34:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 149 states have internal predecessors, (197), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 10:34:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 261 transitions. [2022-03-19 10:34:44,845 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 261 transitions. Word has length 41 [2022-03-19 10:34:44,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:44,845 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 261 transitions. [2022-03-19 10:34:44,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 10:34:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 261 transitions. [2022-03-19 10:34:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 10:34:44,846 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:44,846 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1] [2022-03-19 10:34:44,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:45,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 10:34:45,059 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:45,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:45,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2022-03-19 10:34:45,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:45,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1620382920] [2022-03-19 10:34:45,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:45,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 2 times [2022-03-19 10:34:45,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:45,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496125127] [2022-03-19 10:34:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:45,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:45,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:45,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072043173] [2022-03-19 10:34:45,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:45,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:45,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:45,068 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:45,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 10:34:45,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:45,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:45,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 10:34:45,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 10:34:45,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:34:45,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496125127] [2022-03-19 10:34:45,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:45,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072043173] [2022-03-19 10:34:45,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072043173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:45,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:45,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:34:45,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:45,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1620382920] [2022-03-19 10:34:45,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1620382920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:45,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:45,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:34:45,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076791956] [2022-03-19 10:34:45,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:45,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:34:45,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:34:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:34:45,174 INFO L87 Difference]: Start difference. First operand 194 states and 261 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 10:34:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:45,212 INFO L93 Difference]: Finished difference Result 261 states and 367 transitions. [2022-03-19 10:34:45,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:34:45,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-03-19 10:34:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:45,214 INFO L225 Difference]: With dead ends: 261 [2022-03-19 10:34:45,214 INFO L226 Difference]: Without dead ends: 259 [2022-03-19 10:34:45,215 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:34:45,215 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:45,215 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 169 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-19 10:34:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 228. [2022-03-19 10:34:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 161 states have (on average 1.329192546583851) internal successors, (214), 167 states have internal predecessors, (214), 53 states have call successors, (53), 14 states have call predecessors, (53), 13 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-19 10:34:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 318 transitions. [2022-03-19 10:34:45,232 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 318 transitions. Word has length 44 [2022-03-19 10:34:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:45,232 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 318 transitions. [2022-03-19 10:34:45,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 10:34:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 318 transitions. [2022-03-19 10:34:45,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 10:34:45,233 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:45,233 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-03-19 10:34:45,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:45,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 10:34:45,447 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2022-03-19 10:34:45,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:45,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1055430878] [2022-03-19 10:34:45,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 2 times [2022-03-19 10:34:45,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:45,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634684612] [2022-03-19 10:34:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:45,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:45,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:45,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840976363] [2022-03-19 10:34:45,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:45,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:45,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:45,456 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:45,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 10:34:45,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:45,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:45,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 10:34:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:45,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 10:34:45,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:45,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634684612] [2022-03-19 10:34:45,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840976363] [2022-03-19 10:34:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840976363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:45,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:45,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 10:34:45,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1055430878] [2022-03-19 10:34:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1055430878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:45,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:45,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:34:45,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029421968] [2022-03-19 10:34:45,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:45,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:34:45,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:45,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:34:45,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:34:45,677 INFO L87 Difference]: Start difference. First operand 228 states and 318 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:45,760 INFO L93 Difference]: Finished difference Result 429 states and 607 transitions. [2022-03-19 10:34:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:34:45,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-19 10:34:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:45,763 INFO L225 Difference]: With dead ends: 429 [2022-03-19 10:34:45,763 INFO L226 Difference]: Without dead ends: 264 [2022-03-19 10:34:45,763 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:34:45,764 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 59 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:45,764 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 203 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-19 10:34:45,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-03-19 10:34:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 183 states have (on average 1.3060109289617485) internal successors, (239), 189 states have internal predecessors, (239), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-19 10:34:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2022-03-19 10:34:45,782 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 42 [2022-03-19 10:34:45,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:45,782 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2022-03-19 10:34:45,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 10:34:45,782 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2022-03-19 10:34:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 10:34:45,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:45,783 INFO L500 BasicCegarLoop]: trace histogram [3, 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, 1] [2022-03-19 10:34:45,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:46,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 10:34:46,005 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:46,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2022-03-19 10:34:46,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:46,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1250186915] [2022-03-19 10:34:46,006 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 2 times [2022-03-19 10:34:46,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:46,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22659310] [2022-03-19 10:34:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:46,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:46,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:46,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499581075] [2022-03-19 10:34:46,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:46,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:46,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:46,016 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:46,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 10:34:46,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:46,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:46,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 10:34:46,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 10:34:46,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:34:46,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:46,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22659310] [2022-03-19 10:34:46,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:46,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499581075] [2022-03-19 10:34:46,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499581075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:46,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:46,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:34:46,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:46,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1250186915] [2022-03-19 10:34:46,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1250186915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:46,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:46,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:34:46,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131928717] [2022-03-19 10:34:46,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:46,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:34:46,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:34:46,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:34:46,141 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-03-19 10:34:46,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:46,185 INFO L93 Difference]: Finished difference Result 332 states and 473 transitions. [2022-03-19 10:34:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:34:46,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 [2022-03-19 10:34:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:46,187 INFO L225 Difference]: With dead ends: 332 [2022-03-19 10:34:46,187 INFO L226 Difference]: Without dead ends: 330 [2022-03-19 10:34:46,187 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:34:46,187 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:46,188 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 158 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-19 10:34:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2022-03-19 10:34:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 213 states have (on average 1.3427230046948357) internal successors, (286), 223 states have internal predecessors, (286), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-19 10:34:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 462 transitions. [2022-03-19 10:34:46,210 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 462 transitions. Word has length 46 [2022-03-19 10:34:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:46,210 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 462 transitions. [2022-03-19 10:34:46,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-03-19 10:34:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 462 transitions. [2022-03-19 10:34:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 10:34:46,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:46,211 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:46,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-19 10:34:46,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:46,417 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:46,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:46,418 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 1 times [2022-03-19 10:34:46,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:46,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [545808172] [2022-03-19 10:34:46,418 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:46,418 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 2 times [2022-03-19 10:34:46,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:46,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598853807] [2022-03-19 10:34:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:46,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:46,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498087866] [2022-03-19 10:34:46,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:46,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:46,426 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:46,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 10:34:46,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:46,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:46,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 10:34:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:46,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:46,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:46,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598853807] [2022-03-19 10:34:46,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:46,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498087866] [2022-03-19 10:34:46,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498087866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:46,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:46,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 10:34:46,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:46,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [545808172] [2022-03-19 10:34:46,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [545808172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:46,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:46,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:34:46,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194269206] [2022-03-19 10:34:46,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:46,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:34:46,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:46,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:34:46,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:34:46,693 INFO L87 Difference]: Start difference. First operand 321 states and 462 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:46,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:46,768 INFO L93 Difference]: Finished difference Result 335 states and 475 transitions. [2022-03-19 10:34:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:34:46,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2022-03-19 10:34:46,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:46,770 INFO L225 Difference]: With dead ends: 335 [2022-03-19 10:34:46,770 INFO L226 Difference]: Without dead ends: 328 [2022-03-19 10:34:46,770 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:34:46,771 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 53 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:46,771 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 186 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:46,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-19 10:34:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2022-03-19 10:34:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 216 states have (on average 1.337962962962963) internal successors, (289), 226 states have internal predecessors, (289), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-19 10:34:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 465 transitions. [2022-03-19 10:34:46,795 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 465 transitions. Word has length 57 [2022-03-19 10:34:46,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:46,795 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 465 transitions. [2022-03-19 10:34:46,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:46,795 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 465 transitions. [2022-03-19 10:34:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 10:34:46,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:46,796 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:46,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:47,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 10:34:47,011 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2022-03-19 10:34:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:47,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1497576054] [2022-03-19 10:34:47,012 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 2 times [2022-03-19 10:34:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:47,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815477549] [2022-03-19 10:34:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:47,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:47,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:47,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917440195] [2022-03-19 10:34:47,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:47,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:47,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:47,026 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:47,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 10:34:47,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:47,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:47,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 10:34:47,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 10:34:47,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 10:34:48,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:48,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815477549] [2022-03-19 10:34:48,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:48,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917440195] [2022-03-19 10:34:48,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917440195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:48,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:48,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-19 10:34:48,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:48,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1497576054] [2022-03-19 10:34:48,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1497576054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:48,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:48,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:34:48,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893126756] [2022-03-19 10:34:48,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:48,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:34:48,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:34:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:34:48,268 INFO L87 Difference]: Start difference. First operand 324 states and 465 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:48,618 INFO L93 Difference]: Finished difference Result 384 states and 559 transitions. [2022-03-19 10:34:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:34:48,626 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), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2022-03-19 10:34:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:48,628 INFO L225 Difference]: With dead ends: 384 [2022-03-19 10:34:48,628 INFO L226 Difference]: Without dead ends: 381 [2022-03-19 10:34:48,629 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:34:48,629 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 74 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:48,629 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 474 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:34:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-19 10:34:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-03-19 10:34:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 243 states have (on average 1.345679012345679) internal successors, (327), 256 states have internal predecessors, (327), 113 states have call successors, (113), 21 states have call predecessors, (113), 20 states have return successors, (111), 99 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-19 10:34:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 551 transitions. [2022-03-19 10:34:48,663 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 551 transitions. Word has length 58 [2022-03-19 10:34:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:48,663 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 551 transitions. [2022-03-19 10:34:48,663 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), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 551 transitions. [2022-03-19 10:34:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 10:34:48,664 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:48,664 INFO L500 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:48,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:48,881 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 10:34:48,882 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:48,882 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2022-03-19 10:34:48,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:48,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [919805737] [2022-03-19 10:34:48,882 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:48,883 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 2 times [2022-03-19 10:34:48,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:48,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019344693] [2022-03-19 10:34:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:48,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:48,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:48,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156731573] [2022-03-19 10:34:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:48,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:48,896 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:48,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 10:34:48,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:48,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:48,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 10:34:48,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:49,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:49,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019344693] [2022-03-19 10:34:49,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:49,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156731573] [2022-03-19 10:34:49,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156731573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:49,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:49,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 10:34:49,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:49,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [919805737] [2022-03-19 10:34:49,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [919805737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:49,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:49,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:34:49,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160688325] [2022-03-19 10:34:49,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:49,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:34:49,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:34:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:34:49,184 INFO L87 Difference]: Start difference. First operand 377 states and 551 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:49,294 INFO L93 Difference]: Finished difference Result 604 states and 873 transitions. [2022-03-19 10:34:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:34:49,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2022-03-19 10:34:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:49,296 INFO L225 Difference]: With dead ends: 604 [2022-03-19 10:34:49,296 INFO L226 Difference]: Without dead ends: 440 [2022-03-19 10:34:49,297 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:34:49,297 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 69 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:49,297 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 216 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-03-19 10:34:49,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2022-03-19 10:34:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 279 states have (on average 1.3118279569892473) internal successors, (366), 290 states have internal predecessors, (366), 117 states have call successors, (117), 30 states have call predecessors, (117), 29 states have return successors, (115), 105 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-19 10:34:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 598 transitions. [2022-03-19 10:34:49,329 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 598 transitions. Word has length 63 [2022-03-19 10:34:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:49,329 INFO L478 AbstractCegarLoop]: Abstraction has 426 states and 598 transitions. [2022-03-19 10:34:49,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 598 transitions. [2022-03-19 10:34:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-19 10:34:49,330 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:49,330 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:49,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:49,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 10:34:49,544 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 3 times [2022-03-19 10:34:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:49,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [19597951] [2022-03-19 10:34:49,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 4 times [2022-03-19 10:34:49,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:49,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150866116] [2022-03-19 10:34:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:49,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:49,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:49,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923952626] [2022-03-19 10:34:49,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:34:49,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:49,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:49,552 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:49,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 10:34:49,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:34:49,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:49,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 10:34:49,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:49,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:49,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:49,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150866116] [2022-03-19 10:34:49,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:49,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923952626] [2022-03-19 10:34:49,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923952626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:49,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:49,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 10:34:49,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:49,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [19597951] [2022-03-19 10:34:49,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [19597951] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:49,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:49,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:34:49,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251649198] [2022-03-19 10:34:49,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:49,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:34:49,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:34:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:34:49,864 INFO L87 Difference]: Start difference. First operand 426 states and 598 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:49,997 INFO L93 Difference]: Finished difference Result 531 states and 722 transitions. [2022-03-19 10:34:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:34:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2022-03-19 10:34:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:49,999 INFO L225 Difference]: With dead ends: 531 [2022-03-19 10:34:50,000 INFO L226 Difference]: Without dead ends: 524 [2022-03-19 10:34:50,000 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=274, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:34:50,000 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 108 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:50,001 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 240 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-19 10:34:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 503. [2022-03-19 10:34:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 330 states have (on average 1.290909090909091) internal successors, (426), 346 states have internal predecessors, (426), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-19 10:34:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 691 transitions. [2022-03-19 10:34:50,047 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 691 transitions. Word has length 64 [2022-03-19 10:34:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:50,047 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 691 transitions. [2022-03-19 10:34:50,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 691 transitions. [2022-03-19 10:34:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 10:34:50,051 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:50,051 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-03-19 10:34:50,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:50,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:50,271 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 1 times [2022-03-19 10:34:50,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:50,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1396713652] [2022-03-19 10:34:50,272 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 2 times [2022-03-19 10:34:50,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:50,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329171453] [2022-03-19 10:34:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:50,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:50,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:50,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323159569] [2022-03-19 10:34:50,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:50,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:50,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:50,281 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:50,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 10:34:50,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:50,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:50,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 10:34:50,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-19 10:34:50,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-19 10:34:50,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:50,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329171453] [2022-03-19 10:34:50,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:50,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323159569] [2022-03-19 10:34:50,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323159569] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 10:34:50,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:34:50,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-19 10:34:50,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:50,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1396713652] [2022-03-19 10:34:50,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1396713652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:50,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:50,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:34:50,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656432332] [2022-03-19 10:34:50,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:50,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:34:50,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:50,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:34:50,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:34:50,623 INFO L87 Difference]: Start difference. First operand 503 states and 691 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:34:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:50,691 INFO L93 Difference]: Finished difference Result 517 states and 704 transitions. [2022-03-19 10:34:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:34:50,692 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-19 10:34:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:50,694 INFO L225 Difference]: With dead ends: 517 [2022-03-19 10:34:50,694 INFO L226 Difference]: Without dead ends: 515 [2022-03-19 10:34:50,694 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:34:50,694 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:50,694 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-19 10:34:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 511. [2022-03-19 10:34:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 336 states have (on average 1.2797619047619047) internal successors, (430), 352 states have internal predecessors, (430), 134 states have call successors, (134), 41 states have call predecessors, (134), 40 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-19 10:34:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 695 transitions. [2022-03-19 10:34:50,747 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 695 transitions. Word has length 67 [2022-03-19 10:34:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:50,747 INFO L478 AbstractCegarLoop]: Abstraction has 511 states and 695 transitions. [2022-03-19 10:34:50,747 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:34:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 695 transitions. [2022-03-19 10:34:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 10:34:50,748 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:50,748 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:50,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:50,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:50,958 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 3 times [2022-03-19 10:34:50,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:50,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [897215991] [2022-03-19 10:34:50,959 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:50,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 4 times [2022-03-19 10:34:50,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:50,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428145963] [2022-03-19 10:34:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:50,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:50,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:50,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612055100] [2022-03-19 10:34:50,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:34:50,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:50,973 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:50,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 10:34:51,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:34:51,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:51,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 10:34:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:51,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:51,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:51,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428145963] [2022-03-19 10:34:51,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:51,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612055100] [2022-03-19 10:34:51,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612055100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:51,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:51,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-19 10:34:51,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:51,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [897215991] [2022-03-19 10:34:51,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [897215991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:51,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:51,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:34:51,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400425498] [2022-03-19 10:34:51,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:51,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:34:51,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:34:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:34:51,220 INFO L87 Difference]: Start difference. First operand 511 states and 695 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:34:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:51,590 INFO L93 Difference]: Finished difference Result 857 states and 1271 transitions. [2022-03-19 10:34:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:34:51,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-03-19 10:34:51,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:51,594 INFO L225 Difference]: With dead ends: 857 [2022-03-19 10:34:51,594 INFO L226 Difference]: Without dead ends: 850 [2022-03-19 10:34:51,595 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-03-19 10:34:51,595 INFO L912 BasicCegarLoop]: 118 mSDtfsCounter, 81 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:51,596 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 572 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:34:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-03-19 10:34:51,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 567. [2022-03-19 10:34:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.3) internal successors, (494), 395 states have internal predecessors, (494), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-03-19 10:34:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 783 transitions. [2022-03-19 10:34:51,665 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 783 transitions. Word has length 65 [2022-03-19 10:34:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:51,666 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 783 transitions. [2022-03-19 10:34:51,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:34:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 783 transitions. [2022-03-19 10:34:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 10:34:51,666 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:51,667 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:51,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:51,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 10:34:51,880 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:51,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:51,880 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 1 times [2022-03-19 10:34:51,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:51,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [693826469] [2022-03-19 10:34:51,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 2 times [2022-03-19 10:34:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:51,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310802689] [2022-03-19 10:34:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:51,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:51,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:51,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741416197] [2022-03-19 10:34:51,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:51,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:51,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:51,887 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:51,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 10:34:51,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:51,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:51,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 10:34:51,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:52,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:52,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:52,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310802689] [2022-03-19 10:34:52,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:52,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741416197] [2022-03-19 10:34:52,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741416197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:52,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:52,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 10:34:52,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:52,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [693826469] [2022-03-19 10:34:52,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [693826469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:52,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:52,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:34:52,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787917850] [2022-03-19 10:34:52,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:52,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:34:52,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:52,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:34:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:34:52,200 INFO L87 Difference]: Start difference. First operand 567 states and 783 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:52,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:52,332 INFO L93 Difference]: Finished difference Result 839 states and 1203 transitions. [2022-03-19 10:34:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:34:52,333 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-03-19 10:34:52,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:52,336 INFO L225 Difference]: With dead ends: 839 [2022-03-19 10:34:52,336 INFO L226 Difference]: Without dead ends: 567 [2022-03-19 10:34:52,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:34:52,337 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 63 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:52,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 221 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-19 10:34:52,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-03-19 10:34:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.2894736842105263) internal successors, (490), 395 states have internal predecessors, (490), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-03-19 10:34:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 779 transitions. [2022-03-19 10:34:52,392 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 779 transitions. Word has length 65 [2022-03-19 10:34:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:52,392 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 779 transitions. [2022-03-19 10:34:52,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 779 transitions. [2022-03-19 10:34:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 10:34:52,393 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:52,394 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 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, 1, 1, 1] [2022-03-19 10:34:52,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:52,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 10:34:52,603 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 1 times [2022-03-19 10:34:52,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [402462339] [2022-03-19 10:34:52,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 2 times [2022-03-19 10:34:52,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326267091] [2022-03-19 10:34:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:52,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:52,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:52,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213849478] [2022-03-19 10:34:52,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:52,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:52,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:52,614 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:52,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 10:34:52,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:52,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:52,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 10:34:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-19 10:34:52,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:34:52,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:52,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326267091] [2022-03-19 10:34:52,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:52,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213849478] [2022-03-19 10:34:52,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213849478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:52,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:52,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:34:52,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:52,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [402462339] [2022-03-19 10:34:52,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [402462339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:52,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:52,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:34:52,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966550332] [2022-03-19 10:34:52,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:52,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:34:52,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:52,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:34:52,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:34:52,737 INFO L87 Difference]: Start difference. First operand 567 states and 779 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:34:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:52,840 INFO L93 Difference]: Finished difference Result 980 states and 1387 transitions. [2022-03-19 10:34:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:34:52,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-03-19 10:34:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:52,842 INFO L225 Difference]: With dead ends: 980 [2022-03-19 10:34:52,842 INFO L226 Difference]: Without dead ends: 624 [2022-03-19 10:34:52,844 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:34:52,844 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:52,845 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 127 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:34:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-03-19 10:34:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 568. [2022-03-19 10:34:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 395 states have (on average 1.3012658227848102) internal successors, (514), 400 states have internal predecessors, (514), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-19 10:34:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 779 transitions. [2022-03-19 10:34:52,922 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 779 transitions. Word has length 69 [2022-03-19 10:34:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:52,922 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 779 transitions. [2022-03-19 10:34:52,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:34:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 779 transitions. [2022-03-19 10:34:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 10:34:52,923 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:52,923 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 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, 1, 1, 1] [2022-03-19 10:34:52,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:53,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:53,132 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:53,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:53,133 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 3 times [2022-03-19 10:34:53,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:53,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1734341002] [2022-03-19 10:34:53,133 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:53,133 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 4 times [2022-03-19 10:34:53,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:53,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854094297] [2022-03-19 10:34:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:53,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:53,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:53,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472679994] [2022-03-19 10:34:53,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:34:53,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:53,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:53,144 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:53,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 10:34:53,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:34:53,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:53,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 10:34:53,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:53,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:53,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854094297] [2022-03-19 10:34:53,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472679994] [2022-03-19 10:34:53,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472679994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:53,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:53,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 10:34:53,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1734341002] [2022-03-19 10:34:53,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1734341002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:53,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:53,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:34:53,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972570048] [2022-03-19 10:34:53,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:53,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:34:53,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:34:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:34:53,462 INFO L87 Difference]: Start difference. First operand 568 states and 779 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:53,600 INFO L93 Difference]: Finished difference Result 914 states and 1304 transitions. [2022-03-19 10:34:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:34:53,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2022-03-19 10:34:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:53,603 INFO L225 Difference]: With dead ends: 914 [2022-03-19 10:34:53,603 INFO L226 Difference]: Without dead ends: 584 [2022-03-19 10:34:53,604 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:34:53,604 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 101 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:53,605 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 238 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-03-19 10:34:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 575. [2022-03-19 10:34:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 402 states have (on average 1.2960199004975124) internal successors, (521), 404 states have internal predecessors, (521), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-19 10:34:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 786 transitions. [2022-03-19 10:34:53,674 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 786 transitions. Word has length 69 [2022-03-19 10:34:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:53,675 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 786 transitions. [2022-03-19 10:34:53,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 786 transitions. [2022-03-19 10:34:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 10:34:53,675 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:53,675 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:53,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-19 10:34:53,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:53,892 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:53,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:53,892 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 3 times [2022-03-19 10:34:53,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:53,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1282550168] [2022-03-19 10:34:53,893 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:53,893 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 4 times [2022-03-19 10:34:53,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:53,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456770669] [2022-03-19 10:34:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:53,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:53,898 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:53,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415431693] [2022-03-19 10:34:53,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:34:53,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:53,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:53,899 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:53,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 10:34:53,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:34:53,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:34:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:54,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:54,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:54,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456770669] [2022-03-19 10:34:54,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:54,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415431693] [2022-03-19 10:34:54,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415431693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:54,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:54,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 10:34:54,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:54,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1282550168] [2022-03-19 10:34:54,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1282550168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:54,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:54,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:34:54,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194092812] [2022-03-19 10:34:54,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:54,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:34:54,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:54,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:34:54,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:34:54,232 INFO L87 Difference]: Start difference. First operand 575 states and 786 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:54,427 INFO L93 Difference]: Finished difference Result 918 states and 1274 transitions. [2022-03-19 10:34:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:34:54,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2022-03-19 10:34:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:54,432 INFO L225 Difference]: With dead ends: 918 [2022-03-19 10:34:54,433 INFO L226 Difference]: Without dead ends: 688 [2022-03-19 10:34:54,433 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=244, Invalid=356, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:34:54,434 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 124 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:54,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 278 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-19 10:34:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 658. [2022-03-19 10:34:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 457 states have (on average 1.2735229759299782) internal successors, (582), 460 states have internal predecessors, (582), 151 states have call successors, (151), 50 states have call predecessors, (151), 49 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-19 10:34:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 880 transitions. [2022-03-19 10:34:54,508 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 880 transitions. Word has length 70 [2022-03-19 10:34:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:54,509 INFO L478 AbstractCegarLoop]: Abstraction has 658 states and 880 transitions. [2022-03-19 10:34:54,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 880 transitions. [2022-03-19 10:34:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-19 10:34:54,510 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:54,510 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-03-19 10:34:54,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:54,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 10:34:54,710 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:54,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 1 times [2022-03-19 10:34:54,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:54,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [736310425] [2022-03-19 10:34:54,711 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:54,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 2 times [2022-03-19 10:34:54,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:54,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687363944] [2022-03-19 10:34:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:54,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:54,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:54,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395537053] [2022-03-19 10:34:54,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:54,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:54,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:54,719 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:54,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 10:34:54,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:54,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:54,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 10:34:54,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 10:34:54,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-19 10:34:54,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:54,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687363944] [2022-03-19 10:34:54,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:54,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395537053] [2022-03-19 10:34:54,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395537053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:54,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:54,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 10:34:54,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:54,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [736310425] [2022-03-19 10:34:54,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [736310425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:54,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:54,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:34:54,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447614585] [2022-03-19 10:34:54,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:54,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:34:54,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:54,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:34:54,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:34:54,975 INFO L87 Difference]: Start difference. First operand 658 states and 880 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:34:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:55,168 INFO L93 Difference]: Finished difference Result 757 states and 1022 transitions. [2022-03-19 10:34:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:34:55,175 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-03-19 10:34:55,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:55,178 INFO L225 Difference]: With dead ends: 757 [2022-03-19 10:34:55,178 INFO L226 Difference]: Without dead ends: 755 [2022-03-19 10:34:55,179 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:34:55,179 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:55,181 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 202 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-19 10:34:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 748. [2022-03-19 10:34:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 537 states have (on average 1.297951582867784) internal successors, (697), 546 states have internal predecessors, (697), 160 states have call successors, (160), 51 states have call predecessors, (160), 50 states have return successors, (156), 150 states have call predecessors, (156), 156 states have call successors, (156) [2022-03-19 10:34:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1013 transitions. [2022-03-19 10:34:55,277 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1013 transitions. Word has length 70 [2022-03-19 10:34:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:55,277 INFO L478 AbstractCegarLoop]: Abstraction has 748 states and 1013 transitions. [2022-03-19 10:34:55,277 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:34:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1013 transitions. [2022-03-19 10:34:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 10:34:55,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:55,278 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 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] [2022-03-19 10:34:55,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 10:34:55,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 10:34:55,487 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:55,488 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 3 times [2022-03-19 10:34:55,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:55,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [565604573] [2022-03-19 10:34:55,488 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:55,488 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 4 times [2022-03-19 10:34:55,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:55,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493944055] [2022-03-19 10:34:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:55,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:55,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86562271] [2022-03-19 10:34:55,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:34:55,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:55,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:55,495 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:55,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 10:34:55,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:34:55,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:55,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 10:34:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 10:34:56,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 10:34:56,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:56,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493944055] [2022-03-19 10:34:56,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:56,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86562271] [2022-03-19 10:34:56,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86562271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:56,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:56,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-03-19 10:34:56,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:56,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [565604573] [2022-03-19 10:34:56,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [565604573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:56,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:56,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:34:56,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115346841] [2022-03-19 10:34:56,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:56,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:34:56,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:56,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:34:56,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:34:56,557 INFO L87 Difference]: Start difference. First operand 748 states and 1013 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 10:34:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:56,994 INFO L93 Difference]: Finished difference Result 840 states and 1136 transitions. [2022-03-19 10:34:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:34:56,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 75 [2022-03-19 10:34:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:56,998 INFO L225 Difference]: With dead ends: 840 [2022-03-19 10:34:56,999 INFO L226 Difference]: Without dead ends: 838 [2022-03-19 10:34:56,999 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-03-19 10:34:56,999 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 75 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:57,000 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 588 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:34:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-19 10:34:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 813. [2022-03-19 10:34:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 579 states have (on average 1.302245250431779) internal successors, (754), 589 states have internal predecessors, (754), 178 states have call successors, (178), 56 states have call predecessors, (178), 55 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-19 10:34:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1106 transitions. [2022-03-19 10:34:57,096 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1106 transitions. Word has length 75 [2022-03-19 10:34:57,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:57,097 INFO L478 AbstractCegarLoop]: Abstraction has 813 states and 1106 transitions. [2022-03-19 10:34:57,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-19 10:34:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1106 transitions. [2022-03-19 10:34:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-19 10:34:57,097 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:57,098 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:34:57,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:57,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 10:34:57,314 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 5 times [2022-03-19 10:34:57,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:57,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [98889360] [2022-03-19 10:34:57,315 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 6 times [2022-03-19 10:34:57,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:57,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758238034] [2022-03-19 10:34:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:57,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:57,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:57,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100657403] [2022-03-19 10:34:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:34:57,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:57,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:57,322 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:57,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 10:34:57,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:34:57,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:57,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 10:34:57,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:57,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:34:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:34:57,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:34:57,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758238034] [2022-03-19 10:34:57,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:34:57,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100657403] [2022-03-19 10:34:57,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100657403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:34:57,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:34:57,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 10:34:57,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:34:57,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [98889360] [2022-03-19 10:34:57,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [98889360] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:34:57,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:34:57,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:34:57,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182294168] [2022-03-19 10:34:57,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:34:57,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:34:57,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:57,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:34:57,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:34:57,692 INFO L87 Difference]: Start difference. First operand 813 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:34:57,934 INFO L93 Difference]: Finished difference Result 1433 states and 1997 transitions. [2022-03-19 10:34:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:34:57,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2022-03-19 10:34:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:34:57,938 INFO L225 Difference]: With dead ends: 1433 [2022-03-19 10:34:57,938 INFO L226 Difference]: Without dead ends: 975 [2022-03-19 10:34:57,939 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-03-19 10:34:57,940 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 145 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:34:57,940 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 307 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:34:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-03-19 10:34:58,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 947. [2022-03-19 10:34:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 673 states have (on average 1.274888558692422) internal successors, (858), 683 states have internal predecessors, (858), 205 states have call successors, (205), 69 states have call predecessors, (205), 68 states have return successors, (200), 194 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-19 10:34:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1263 transitions. [2022-03-19 10:34:58,060 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1263 transitions. Word has length 76 [2022-03-19 10:34:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:34:58,061 INFO L478 AbstractCegarLoop]: Abstraction has 947 states and 1263 transitions. [2022-03-19 10:34:58,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 10:34:58,062 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1263 transitions. [2022-03-19 10:34:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 10:34:58,062 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:34:58,063 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 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, 1, 1, 1, 1] [2022-03-19 10:34:58,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 10:34:58,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 10:34:58,275 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:34:58,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:34:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 1 times [2022-03-19 10:34:58,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:34:58,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027624912] [2022-03-19 10:34:58,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:34:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 2 times [2022-03-19 10:34:58,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:34:58,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121772307] [2022-03-19 10:34:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:34:58,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:34:58,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:34:58,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170480927] [2022-03-19 10:34:58,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:34:58,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:34:58,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:34:58,283 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:34:58,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 10:34:58,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:34:58,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:34:58,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 10:34:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:34:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-19 10:34:58,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-19 10:35:00,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:00,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121772307] [2022-03-19 10:35:00,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:00,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170480927] [2022-03-19 10:35:00,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170480927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:00,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:00,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-19 10:35:00,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:00,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1027624912] [2022-03-19 10:35:00,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1027624912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:00,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:00,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:35:00,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82351867] [2022-03-19 10:35:00,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:00,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:35:00,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:00,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:35:00,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:35:00,902 INFO L87 Difference]: Start difference. First operand 947 states and 1263 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 10:35:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:01,743 INFO L93 Difference]: Finished difference Result 1025 states and 1371 transitions. [2022-03-19 10:35:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:35:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2022-03-19 10:35:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:01,747 INFO L225 Difference]: With dead ends: 1025 [2022-03-19 10:35:01,747 INFO L226 Difference]: Without dead ends: 1022 [2022-03-19 10:35:01,747 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-19 10:35:01,747 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 76 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:01,748 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 553 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:35:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-03-19 10:35:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 957. [2022-03-19 10:35:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2695139911634756) internal successors, (862), 689 states have internal predecessors, (862), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-19 10:35:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1272 transitions. [2022-03-19 10:35:01,859 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1272 transitions. Word has length 81 [2022-03-19 10:35:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:01,859 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1272 transitions. [2022-03-19 10:35:01,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-19 10:35:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1272 transitions. [2022-03-19 10:35:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 10:35:01,860 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:01,860 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 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, 1] [2022-03-19 10:35:01,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-19 10:35:02,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 10:35:02,064 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 1 times [2022-03-19 10:35:02,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:02,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909242525] [2022-03-19 10:35:02,065 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 2 times [2022-03-19 10:35:02,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119746563] [2022-03-19 10:35:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:02,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:02,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:02,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083659724] [2022-03-19 10:35:02,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:02,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:02,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:02,071 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:02,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 10:35:02,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:02,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:35:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:35:02,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:35:02,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:02,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119746563] [2022-03-19 10:35:02,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:02,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083659724] [2022-03-19 10:35:02,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083659724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:02,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:02,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 10:35:02,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:02,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909242525] [2022-03-19 10:35:02,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909242525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:02,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:02,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:35:02,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723508623] [2022-03-19 10:35:02,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:02,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:35:02,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:02,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:35:02,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:35:02,470 INFO L87 Difference]: Start difference. First operand 957 states and 1272 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:02,690 INFO L93 Difference]: Finished difference Result 966 states and 1279 transitions. [2022-03-19 10:35:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:35:02,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2022-03-19 10:35:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:02,698 INFO L225 Difference]: With dead ends: 966 [2022-03-19 10:35:02,698 INFO L226 Difference]: Without dead ends: 959 [2022-03-19 10:35:02,699 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=246, Invalid=354, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:35:02,699 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 125 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:02,699 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 280 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:35:02,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-19 10:35:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 957. [2022-03-19 10:35:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2665684830633284) internal successors, (860), 689 states have internal predecessors, (860), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-19 10:35:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1270 transitions. [2022-03-19 10:35:02,806 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1270 transitions. Word has length 87 [2022-03-19 10:35:02,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:02,807 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1270 transitions. [2022-03-19 10:35:02,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:02,807 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1270 transitions. [2022-03-19 10:35:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-19 10:35:02,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:02,808 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 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, 1] [2022-03-19 10:35:02,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:03,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:03,015 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 3 times [2022-03-19 10:35:03,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:03,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [49969279] [2022-03-19 10:35:03,016 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 4 times [2022-03-19 10:35:03,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:03,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374644464] [2022-03-19 10:35:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:03,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:03,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:03,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259786771] [2022-03-19 10:35:03,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:35:03,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:03,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:03,022 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:03,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 10:35:03,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:35:03,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:03,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-19 10:35:03,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-19 10:35:03,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-19 10:35:06,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:06,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374644464] [2022-03-19 10:35:06,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:06,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259786771] [2022-03-19 10:35:06,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259786771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:06,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:06,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-03-19 10:35:06,891 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:06,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [49969279] [2022-03-19 10:35:06,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [49969279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:06,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:06,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:35:06,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419426934] [2022-03-19 10:35:06,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:06,892 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:35:06,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:06,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:35:06,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-19 10:35:06,892 INFO L87 Difference]: Start difference. First operand 957 states and 1270 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:07,581 INFO L93 Difference]: Finished difference Result 1073 states and 1433 transitions. [2022-03-19 10:35:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:35:07,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2022-03-19 10:35:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:07,585 INFO L225 Difference]: With dead ends: 1073 [2022-03-19 10:35:07,585 INFO L226 Difference]: Without dead ends: 1070 [2022-03-19 10:35:07,586 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:35:07,586 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 91 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:07,586 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 844 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 10:35:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-19 10:35:07,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1027. [2022-03-19 10:35:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 723 states have (on average 1.2738589211618256) internal successors, (921), 734 states have internal predecessors, (921), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-19 10:35:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1375 transitions. [2022-03-19 10:35:07,706 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1375 transitions. Word has length 88 [2022-03-19 10:35:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:07,706 INFO L478 AbstractCegarLoop]: Abstraction has 1027 states and 1375 transitions. [2022-03-19 10:35:07,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:07,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1375 transitions. [2022-03-19 10:35:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 10:35:07,708 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:07,708 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 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] [2022-03-19 10:35:07,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:07,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 10:35:07,923 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 5 times [2022-03-19 10:35:07,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:07,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [691108015] [2022-03-19 10:35:07,924 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 6 times [2022-03-19 10:35:07,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:07,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600647278] [2022-03-19 10:35:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:07,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:07,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:07,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609460991] [2022-03-19 10:35:07,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:35:07,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:07,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:07,935 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:07,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 10:35:08,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:35:08,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:08,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 10:35:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:35:08,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:35:08,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:08,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600647278] [2022-03-19 10:35:08,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:08,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609460991] [2022-03-19 10:35:08,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609460991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:08,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:08,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 10:35:08,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:08,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [691108015] [2022-03-19 10:35:08,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [691108015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:08,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:08,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:35:08,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844366176] [2022-03-19 10:35:08,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:08,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:35:08,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:08,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:35:08,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:35:08,364 INFO L87 Difference]: Start difference. First operand 1027 states and 1375 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:08,604 INFO L93 Difference]: Finished difference Result 1062 states and 1410 transitions. [2022-03-19 10:35:08,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:35:08,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2022-03-19 10:35:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:08,608 INFO L225 Difference]: With dead ends: 1062 [2022-03-19 10:35:08,608 INFO L226 Difference]: Without dead ends: 1055 [2022-03-19 10:35:08,608 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=312, Invalid=444, Unknown=0, NotChecked=0, Total=756 [2022-03-19 10:35:08,609 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 170 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:08,609 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 293 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:35:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-03-19 10:35:08,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1038. [2022-03-19 10:35:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 734 states have (on average 1.2697547683923707) internal successors, (932), 745 states have internal predecessors, (932), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-19 10:35:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1386 transitions. [2022-03-19 10:35:08,718 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1386 transitions. Word has length 91 [2022-03-19 10:35:08,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:08,718 INFO L478 AbstractCegarLoop]: Abstraction has 1038 states and 1386 transitions. [2022-03-19 10:35:08,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:08,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1386 transitions. [2022-03-19 10:35:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 10:35:08,719 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:08,719 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 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] [2022-03-19 10:35:08,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:08,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:08,938 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:08,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:08,939 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 1 times [2022-03-19 10:35:08,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:08,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1537666429] [2022-03-19 10:35:08,939 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:08,939 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 2 times [2022-03-19 10:35:08,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:08,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565419535] [2022-03-19 10:35:08,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:08,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:08,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:08,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709733567] [2022-03-19 10:35:08,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:08,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:08,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:08,948 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:08,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 10:35:09,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:09,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:09,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 10:35:09,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:35:09,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:35:09,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565419535] [2022-03-19 10:35:09,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:09,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709733567] [2022-03-19 10:35:09,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709733567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:09,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:09,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 10:35:09,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:09,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1537666429] [2022-03-19 10:35:09,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1537666429] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:09,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:09,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:35:09,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841982146] [2022-03-19 10:35:09,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:09,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:35:09,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:09,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:35:09,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:35:09,369 INFO L87 Difference]: Start difference. First operand 1038 states and 1386 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:09,614 INFO L93 Difference]: Finished difference Result 1382 states and 1902 transitions. [2022-03-19 10:35:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:35:09,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2022-03-19 10:35:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:09,617 INFO L225 Difference]: With dead ends: 1382 [2022-03-19 10:35:09,617 INFO L226 Difference]: Without dead ends: 1062 [2022-03-19 10:35:09,618 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2022-03-19 10:35:09,619 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 155 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:09,619 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 301 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:35:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-03-19 10:35:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1058. [2022-03-19 10:35:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 754 states have (on average 1.2612732095490715) internal successors, (951), 765 states have internal predecessors, (951), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-19 10:35:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1405 transitions. [2022-03-19 10:35:09,737 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1405 transitions. Word has length 93 [2022-03-19 10:35:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:09,737 INFO L478 AbstractCegarLoop]: Abstraction has 1058 states and 1405 transitions. [2022-03-19 10:35:09,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1405 transitions. [2022-03-19 10:35:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 10:35:09,739 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:09,739 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 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] [2022-03-19 10:35:09,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:09,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:09,950 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:09,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:09,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 5 times [2022-03-19 10:35:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1886775004] [2022-03-19 10:35:09,951 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 6 times [2022-03-19 10:35:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940078242] [2022-03-19 10:35:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:09,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:09,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273260909] [2022-03-19 10:35:09,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:35:09,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:09,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:09,957 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:09,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 10:35:10,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:35:10,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:10,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 10:35:10,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:35:10,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:35:10,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940078242] [2022-03-19 10:35:10,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273260909] [2022-03-19 10:35:10,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273260909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:10,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:10,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 10:35:10,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:10,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1886775004] [2022-03-19 10:35:10,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1886775004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:10,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:10,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:35:10,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783808586] [2022-03-19 10:35:10,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:10,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:35:10,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:10,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:35:10,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:35:10,471 INFO L87 Difference]: Start difference. First operand 1058 states and 1405 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:10,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:10,763 INFO L93 Difference]: Finished difference Result 1539 states and 2090 transitions. [2022-03-19 10:35:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:35:10,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-03-19 10:35:10,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:10,767 INFO L225 Difference]: With dead ends: 1539 [2022-03-19 10:35:10,767 INFO L226 Difference]: Without dead ends: 1219 [2022-03-19 10:35:10,768 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:35:10,769 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 187 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:10,769 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 327 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:35:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-03-19 10:35:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1164. [2022-03-19 10:35:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 812 states have (on average 1.2561576354679802) internal successors, (1020), 824 states have internal predecessors, (1020), 262 states have call successors, (262), 90 states have call predecessors, (262), 89 states have return successors, (257), 249 states have call predecessors, (257), 257 states have call successors, (257) [2022-03-19 10:35:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1539 transitions. [2022-03-19 10:35:10,900 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1539 transitions. Word has length 97 [2022-03-19 10:35:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:10,901 INFO L478 AbstractCegarLoop]: Abstraction has 1164 states and 1539 transitions. [2022-03-19 10:35:10,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1539 transitions. [2022-03-19 10:35:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-19 10:35:10,902 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:10,902 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 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] [2022-03-19 10:35:10,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 10:35:11,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-19 10:35:11,104 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:11,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 7 times [2022-03-19 10:35:11,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:11,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1652735199] [2022-03-19 10:35:11,105 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:11,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 8 times [2022-03-19 10:35:11,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:11,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330144992] [2022-03-19 10:35:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:11,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:11,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:11,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167449128] [2022-03-19 10:35:11,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:11,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:11,111 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:11,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 10:35:11,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:11,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:11,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 10:35:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:35:11,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:35:11,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:11,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330144992] [2022-03-19 10:35:11,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:11,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167449128] [2022-03-19 10:35:11,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167449128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:11,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:11,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 10:35:11,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:11,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1652735199] [2022-03-19 10:35:11,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1652735199] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:11,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:11,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:35:11,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687183554] [2022-03-19 10:35:11,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:11,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:35:11,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:35:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:35:11,591 INFO L87 Difference]: Start difference. First operand 1164 states and 1539 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:11,941 INFO L93 Difference]: Finished difference Result 1434 states and 1877 transitions. [2022-03-19 10:35:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 10:35:11,942 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2022-03-19 10:35:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:11,946 INFO L225 Difference]: With dead ends: 1434 [2022-03-19 10:35:11,946 INFO L226 Difference]: Without dead ends: 1427 [2022-03-19 10:35:11,947 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=407, Invalid=585, Unknown=0, NotChecked=0, Total=992 [2022-03-19 10:35:11,947 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 218 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:11,947 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 327 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:35:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-03-19 10:35:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1358. [2022-03-19 10:35:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 940 states have (on average 1.2446808510638299) internal successors, (1170), 965 states have internal predecessors, (1170), 311 states have call successors, (311), 107 states have call predecessors, (311), 106 states have return successors, (305), 285 states have call predecessors, (305), 305 states have call successors, (305) [2022-03-19 10:35:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1786 transitions. [2022-03-19 10:35:12,111 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1786 transitions. Word has length 98 [2022-03-19 10:35:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:12,111 INFO L478 AbstractCegarLoop]: Abstraction has 1358 states and 1786 transitions. [2022-03-19 10:35:12,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1786 transitions. [2022-03-19 10:35:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 10:35:12,112 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:12,112 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 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, 1] [2022-03-19 10:35:12,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-19 10:35:12,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 10:35:12,314 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:12,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1348351390, now seen corresponding path program 1 times [2022-03-19 10:35:12,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:12,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [948329823] [2022-03-19 10:35:12,315 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:12,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1348351390, now seen corresponding path program 2 times [2022-03-19 10:35:12,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:12,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620111349] [2022-03-19 10:35:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:12,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:12,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:12,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795539611] [2022-03-19 10:35:12,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:12,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:12,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:12,321 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:12,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 10:35:12,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:12,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:12,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 10:35:12,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:35:12,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 39 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:35:12,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:12,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620111349] [2022-03-19 10:35:12,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:12,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795539611] [2022-03-19 10:35:12,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795539611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:12,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:12,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 10:35:12,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:12,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [948329823] [2022-03-19 10:35:12,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [948329823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:12,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:12,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:35:12,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424695367] [2022-03-19 10:35:12,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:12,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:35:12,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:12,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:35:12,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:35:12,809 INFO L87 Difference]: Start difference. First operand 1358 states and 1786 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:13,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:13,148 INFO L93 Difference]: Finished difference Result 1838 states and 2503 transitions. [2022-03-19 10:35:13,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:35:13,148 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2022-03-19 10:35:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:13,153 INFO L225 Difference]: With dead ends: 1838 [2022-03-19 10:35:13,153 INFO L226 Difference]: Without dead ends: 1358 [2022-03-19 10:35:13,154 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=547, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:35:13,154 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 205 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:13,154 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 320 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:35:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-03-19 10:35:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1334. [2022-03-19 10:35:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 924 states have (on average 1.2272727272727273) internal successors, (1134), 948 states have internal predecessors, (1134), 304 states have call successors, (304), 106 states have call predecessors, (304), 105 states have return successors, (298), 279 states have call predecessors, (298), 298 states have call successors, (298) [2022-03-19 10:35:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1736 transitions. [2022-03-19 10:35:13,307 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1736 transitions. Word has length 99 [2022-03-19 10:35:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:13,308 INFO L478 AbstractCegarLoop]: Abstraction has 1334 states and 1736 transitions. [2022-03-19 10:35:13,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1736 transitions. [2022-03-19 10:35:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-19 10:35:13,309 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:13,309 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 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, 1, 1, 1, 1] [2022-03-19 10:35:13,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:13,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 10:35:13,523 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1350164207, now seen corresponding path program 5 times [2022-03-19 10:35:13,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:13,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1413650405] [2022-03-19 10:35:13,524 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1350164207, now seen corresponding path program 6 times [2022-03-19 10:35:13,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:13,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964490779] [2022-03-19 10:35:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:13,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:13,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:13,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179603572] [2022-03-19 10:35:13,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:35:13,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:13,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:13,532 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:13,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 10:35:13,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:35:13,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:13,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 10:35:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:14,144 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:35:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 57 proven. 35 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-03-19 10:35:14,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:14,423 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:35:14,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:14,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964490779] [2022-03-19 10:35:14,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:14,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179603572] [2022-03-19 10:35:14,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179603572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:35:14,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:35:14,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 10:35:14,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:14,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1413650405] [2022-03-19 10:35:14,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1413650405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:14,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:14,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:35:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747066955] [2022-03-19 10:35:14,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:14,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:35:14,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:14,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:35:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:35:14,556 INFO L87 Difference]: Start difference. First operand 1334 states and 1736 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 10:35:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:15,086 INFO L93 Difference]: Finished difference Result 1565 states and 2045 transitions. [2022-03-19 10:35:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:35:15,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 104 [2022-03-19 10:35:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:15,092 INFO L225 Difference]: With dead ends: 1565 [2022-03-19 10:35:15,092 INFO L226 Difference]: Without dead ends: 1556 [2022-03-19 10:35:15,093 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:35:15,093 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 65 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:15,093 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 403 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:35:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-03-19 10:35:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1518. [2022-03-19 10:35:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1051 states have (on average 1.2274024738344433) internal successors, (1290), 1078 states have internal predecessors, (1290), 350 states have call successors, (350), 118 states have call predecessors, (350), 116 states have return successors, (345), 321 states have call predecessors, (345), 345 states have call successors, (345) [2022-03-19 10:35:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 1985 transitions. [2022-03-19 10:35:15,312 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 1985 transitions. Word has length 104 [2022-03-19 10:35:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:15,312 INFO L478 AbstractCegarLoop]: Abstraction has 1518 states and 1985 transitions. [2022-03-19 10:35:15,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 10:35:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 1985 transitions. [2022-03-19 10:35:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 10:35:15,313 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:15,313 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-19 10:35:15,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:15,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:15,530 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1433350311, now seen corresponding path program 5 times [2022-03-19 10:35:15,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:15,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [31241548] [2022-03-19 10:35:15,531 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1433350311, now seen corresponding path program 6 times [2022-03-19 10:35:15,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:15,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474780200] [2022-03-19 10:35:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:15,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:15,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:15,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685077885] [2022-03-19 10:35:15,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:35:15,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:15,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:15,539 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:15,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 10:35:15,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:35:15,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:15,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 10:35:15,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 40 proven. 73 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-19 10:35:16,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 66 proven. 47 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-19 10:35:16,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:16,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474780200] [2022-03-19 10:35:16,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:16,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685077885] [2022-03-19 10:35:16,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685077885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:16,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:16,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2022-03-19 10:35:16,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:16,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [31241548] [2022-03-19 10:35:16,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [31241548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:16,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:16,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:35:16,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751072906] [2022-03-19 10:35:16,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:16,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:35:16,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:16,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:35:16,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:35:16,543 INFO L87 Difference]: Start difference. First operand 1518 states and 1985 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:35:17,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:17,600 INFO L93 Difference]: Finished difference Result 1833 states and 2418 transitions. [2022-03-19 10:35:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:35:17,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 102 [2022-03-19 10:35:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:17,608 INFO L225 Difference]: With dead ends: 1833 [2022-03-19 10:35:17,608 INFO L226 Difference]: Without dead ends: 1831 [2022-03-19 10:35:17,609 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-19 10:35:17,609 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 148 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:17,609 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 838 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 10:35:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2022-03-19 10:35:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1765. [2022-03-19 10:35:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1240 states have (on average 1.2508064516129032) internal successors, (1551), 1274 states have internal predecessors, (1551), 397 states have call successors, (397), 129 states have call predecessors, (397), 127 states have return successors, (392), 361 states have call predecessors, (392), 392 states have call successors, (392) [2022-03-19 10:35:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2340 transitions. [2022-03-19 10:35:17,864 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2340 transitions. Word has length 102 [2022-03-19 10:35:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:17,864 INFO L478 AbstractCegarLoop]: Abstraction has 1765 states and 2340 transitions. [2022-03-19 10:35:17,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:35:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2340 transitions. [2022-03-19 10:35:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 10:35:17,865 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:17,865 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 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] [2022-03-19 10:35:17,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:18,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 10:35:18,079 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2051750892, now seen corresponding path program 7 times [2022-03-19 10:35:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:18,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1101114124] [2022-03-19 10:35:18,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2051750892, now seen corresponding path program 8 times [2022-03-19 10:35:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:18,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057062891] [2022-03-19 10:35:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:18,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:18,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013825638] [2022-03-19 10:35:18,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:18,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:18,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:18,086 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:18,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 10:35:18,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:18,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:18,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 10:35:18,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:35:18,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:35:18,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:18,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057062891] [2022-03-19 10:35:18,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:18,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013825638] [2022-03-19 10:35:18,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013825638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:18,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:18,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 10:35:18,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:18,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1101114124] [2022-03-19 10:35:18,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1101114124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:18,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:18,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:35:18,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734114590] [2022-03-19 10:35:18,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:18,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:35:18,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:18,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:35:18,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:35:18,605 INFO L87 Difference]: Start difference. First operand 1765 states and 2340 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:19,089 INFO L93 Difference]: Finished difference Result 2634 states and 3640 transitions. [2022-03-19 10:35:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 10:35:19,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2022-03-19 10:35:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:19,096 INFO L225 Difference]: With dead ends: 2634 [2022-03-19 10:35:19,096 INFO L226 Difference]: Without dead ends: 1870 [2022-03-19 10:35:19,097 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-03-19 10:35:19,098 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 215 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:19,098 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 348 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:35:19,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-03-19 10:35:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1825. [2022-03-19 10:35:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1298 states have (on average 1.2496147919876734) internal successors, (1622), 1319 states have internal predecessors, (1622), 398 states have call successors, (398), 130 states have call predecessors, (398), 128 states have return successors, (393), 375 states have call predecessors, (393), 393 states have call successors, (393) [2022-03-19 10:35:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2413 transitions. [2022-03-19 10:35:19,375 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2413 transitions. Word has length 103 [2022-03-19 10:35:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:19,375 INFO L478 AbstractCegarLoop]: Abstraction has 1825 states and 2413 transitions. [2022-03-19 10:35:19,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2413 transitions. [2022-03-19 10:35:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-19 10:35:19,376 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:19,377 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 4, 4, 4, 3, 2, 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] [2022-03-19 10:35:19,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:19,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 10:35:19,591 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1865093808, now seen corresponding path program 7 times [2022-03-19 10:35:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:19,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [916063108] [2022-03-19 10:35:19,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1865093808, now seen corresponding path program 8 times [2022-03-19 10:35:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:19,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135142560] [2022-03-19 10:35:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:19,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:19,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:19,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896440164] [2022-03-19 10:35:19,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:19,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:19,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:19,600 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:19,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 10:35:19,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:19,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:19,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 10:35:19,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 133 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:35:19,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 69 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:35:20,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:20,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135142560] [2022-03-19 10:35:20,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:20,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896440164] [2022-03-19 10:35:20,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896440164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:20,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:20,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-19 10:35:20,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:20,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [916063108] [2022-03-19 10:35:20,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [916063108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:20,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:20,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:35:20,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064163834] [2022-03-19 10:35:20,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:20,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:35:20,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:35:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:35:20,118 INFO L87 Difference]: Start difference. First operand 1825 states and 2413 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:20,671 INFO L93 Difference]: Finished difference Result 2758 states and 3762 transitions. [2022-03-19 10:35:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 10:35:20,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2022-03-19 10:35:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:20,678 INFO L225 Difference]: With dead ends: 2758 [2022-03-19 10:35:20,678 INFO L226 Difference]: Without dead ends: 2189 [2022-03-19 10:35:20,680 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=426, Invalid=630, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 10:35:20,680 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 248 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:20,680 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 359 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:35:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-03-19 10:35:21,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2064. [2022-03-19 10:35:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1436 states have (on average 1.2395543175487465) internal successors, (1780), 1459 states have internal predecessors, (1780), 474 states have call successors, (474), 155 states have call predecessors, (474), 153 states have return successors, (468), 449 states have call predecessors, (468), 468 states have call successors, (468) [2022-03-19 10:35:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 2722 transitions. [2022-03-19 10:35:21,039 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 2722 transitions. Word has length 104 [2022-03-19 10:35:21,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:21,039 INFO L478 AbstractCegarLoop]: Abstraction has 2064 states and 2722 transitions. [2022-03-19 10:35:21,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:21,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 2722 transitions. [2022-03-19 10:35:21,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-19 10:35:21,041 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:21,041 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 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, 1, 1] [2022-03-19 10:35:21,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:21,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 10:35:21,251 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:21,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash 911562927, now seen corresponding path program 7 times [2022-03-19 10:35:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:21,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [161544962] [2022-03-19 10:35:21,252 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash 911562927, now seen corresponding path program 8 times [2022-03-19 10:35:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:21,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676919334] [2022-03-19 10:35:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:21,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:21,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:21,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604646977] [2022-03-19 10:35:21,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:21,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:21,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:21,258 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:21,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 10:35:21,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:21,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:21,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-19 10:35:21,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-19 10:35:22,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-19 10:35:23,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:23,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676919334] [2022-03-19 10:35:23,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:23,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604646977] [2022-03-19 10:35:23,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604646977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:23,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:23,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-19 10:35:23,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:23,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [161544962] [2022-03-19 10:35:23,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [161544962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:23,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:23,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:35:23,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090128330] [2022-03-19 10:35:23,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:23,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:35:23,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:35:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:35:23,243 INFO L87 Difference]: Start difference. First operand 2064 states and 2722 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:35:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:23,963 INFO L93 Difference]: Finished difference Result 2130 states and 2803 transitions. [2022-03-19 10:35:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:35:23,963 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 108 [2022-03-19 10:35:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:23,969 INFO L225 Difference]: With dead ends: 2130 [2022-03-19 10:35:23,969 INFO L226 Difference]: Without dead ends: 2125 [2022-03-19 10:35:23,970 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-03-19 10:35:23,970 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:23,970 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 594 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:35:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2022-03-19 10:35:24,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 2071. [2022-03-19 10:35:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1442 states have (on average 1.2371705963938973) internal successors, (1784), 1466 states have internal predecessors, (1784), 471 states have call successors, (471), 158 states have call predecessors, (471), 157 states have return successors, (466), 446 states have call predecessors, (466), 466 states have call successors, (466) [2022-03-19 10:35:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2721 transitions. [2022-03-19 10:35:24,278 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2721 transitions. Word has length 108 [2022-03-19 10:35:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:24,278 INFO L478 AbstractCegarLoop]: Abstraction has 2071 states and 2721 transitions. [2022-03-19 10:35:24,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:35:24,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2721 transitions. [2022-03-19 10:35:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 10:35:24,279 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:24,279 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-03-19 10:35:24,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:24,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-19 10:35:24,490 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:24,490 INFO L85 PathProgramCache]: Analyzing trace with hash -373909618, now seen corresponding path program 9 times [2022-03-19 10:35:24,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:24,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [359061256] [2022-03-19 10:35:24,491 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:24,491 INFO L85 PathProgramCache]: Analyzing trace with hash -373909618, now seen corresponding path program 10 times [2022-03-19 10:35:24,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:24,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934680829] [2022-03-19 10:35:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:24,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:24,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:24,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534624941] [2022-03-19 10:35:24,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:35:24,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:24,498 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:24,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 10:35:24,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:35:24,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:24,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-19 10:35:24,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 84 proven. 64 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 10:35:26,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 97 proven. 45 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-19 10:35:29,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:29,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934680829] [2022-03-19 10:35:29,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:29,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534624941] [2022-03-19 10:35:29,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534624941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:29,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:29,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-19 10:35:29,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:29,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [359061256] [2022-03-19 10:35:29,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [359061256] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:29,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:29,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 10:35:29,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680111392] [2022-03-19 10:35:29,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:29,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 10:35:29,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:29,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 10:35:29,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 10:35:29,261 INFO L87 Difference]: Start difference. First operand 2071 states and 2721 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 10:35:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:31,056 INFO L93 Difference]: Finished difference Result 2221 states and 2903 transitions. [2022-03-19 10:35:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 10:35:31,057 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 111 [2022-03-19 10:35:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:31,062 INFO L225 Difference]: With dead ends: 2221 [2022-03-19 10:35:31,062 INFO L226 Difference]: Without dead ends: 2218 [2022-03-19 10:35:31,063 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 10:35:31,063 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 139 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:31,064 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 923 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 10:35:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-03-19 10:35:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2137. [2022-03-19 10:35:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 1487 states have (on average 1.2313382649630127) internal successors, (1831), 1511 states have internal predecessors, (1831), 479 states have call successors, (479), 171 states have call predecessors, (479), 170 states have return successors, (474), 454 states have call predecessors, (474), 474 states have call successors, (474) [2022-03-19 10:35:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 2784 transitions. [2022-03-19 10:35:31,393 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 2784 transitions. Word has length 111 [2022-03-19 10:35:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:31,393 INFO L478 AbstractCegarLoop]: Abstraction has 2137 states and 2784 transitions. [2022-03-19 10:35:31,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 10:35:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 2784 transitions. [2022-03-19 10:35:31,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-19 10:35:31,394 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:31,395 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:35:31,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:31,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:31,612 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:31,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1182187798, now seen corresponding path program 7 times [2022-03-19 10:35:31,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:31,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [861825713] [2022-03-19 10:35:31,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1182187798, now seen corresponding path program 8 times [2022-03-19 10:35:31,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:31,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472380448] [2022-03-19 10:35:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:31,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:31,617 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:31,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476602606] [2022-03-19 10:35:31,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:31,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:31,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:31,619 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:31,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 10:35:31,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:31,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:31,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-19 10:35:31,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:33,422 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:35:33,423 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:35:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 47 proven. 113 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 10:35:33,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-03-19 10:35:34,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:34,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472380448] [2022-03-19 10:35:34,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:34,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476602606] [2022-03-19 10:35:34,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476602606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:34,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:34,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 28 [2022-03-19 10:35:34,340 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:34,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [861825713] [2022-03-19 10:35:34,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [861825713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:34,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:34,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 10:35:34,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051840783] [2022-03-19 10:35:34,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:34,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 10:35:34,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 10:35:34,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-19 10:35:34,343 INFO L87 Difference]: Start difference. First operand 2137 states and 2784 transitions. Second operand has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-19 10:35:36,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:39,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:35:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:39,862 INFO L93 Difference]: Finished difference Result 2272 states and 2960 transitions. [2022-03-19 10:35:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 10:35:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 109 [2022-03-19 10:35:39,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:39,867 INFO L225 Difference]: With dead ends: 2272 [2022-03-19 10:35:39,867 INFO L226 Difference]: Without dead ends: 2270 [2022-03-19 10:35:39,868 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 10:35:39,868 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 126 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:39,868 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 995 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1022 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-03-19 10:35:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2022-03-19 10:35:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2212. [2022-03-19 10:35:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1537 states have (on average 1.2335718932986337) internal successors, (1896), 1562 states have internal predecessors, (1896), 497 states have call successors, (497), 178 states have call predecessors, (497), 177 states have return successors, (492), 471 states have call predecessors, (492), 492 states have call successors, (492) [2022-03-19 10:35:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2885 transitions. [2022-03-19 10:35:40,208 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2885 transitions. Word has length 109 [2022-03-19 10:35:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:40,208 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2885 transitions. [2022-03-19 10:35:40,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-19 10:35:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2885 transitions. [2022-03-19 10:35:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:35:40,209 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:40,209 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 5, 4, 4, 4, 3, 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, 1] [2022-03-19 10:35:40,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-19 10:35:40,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:40,414 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1720519159, now seen corresponding path program 9 times [2022-03-19 10:35:40,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:40,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [436305866] [2022-03-19 10:35:40,415 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1720519159, now seen corresponding path program 10 times [2022-03-19 10:35:40,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:40,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365292712] [2022-03-19 10:35:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:40,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:40,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:40,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873762357] [2022-03-19 10:35:40,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:35:40,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:40,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:40,421 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:40,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 10:35:40,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:35:40,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:40,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 10:35:40,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 142 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:35:40,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 78 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 10:35:40,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:40,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365292712] [2022-03-19 10:35:40,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:40,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873762357] [2022-03-19 10:35:40,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873762357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:40,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:40,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-19 10:35:40,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:40,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [436305866] [2022-03-19 10:35:40,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [436305866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:40,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:40,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:35:40,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922270977] [2022-03-19 10:35:40,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:40,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:35:40,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:35:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:35:40,915 INFO L87 Difference]: Start difference. First operand 2212 states and 2885 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:41,618 INFO L93 Difference]: Finished difference Result 3498 states and 4737 transitions. [2022-03-19 10:35:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 10:35:41,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 110 [2022-03-19 10:35:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:41,624 INFO L225 Difference]: With dead ends: 3498 [2022-03-19 10:35:41,625 INFO L226 Difference]: Without dead ends: 2692 [2022-03-19 10:35:41,626 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=446, Invalid=676, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 10:35:41,627 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 341 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:41,627 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 362 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:35:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2022-03-19 10:35:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2630. [2022-03-19 10:35:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 1836 states have (on average 1.2167755991285403) internal successors, (2234), 1862 states have internal predecessors, (2234), 587 states have call successors, (587), 207 states have call predecessors, (587), 206 states have return successors, (581), 560 states have call predecessors, (581), 581 states have call successors, (581) [2022-03-19 10:35:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 3402 transitions. [2022-03-19 10:35:42,043 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 3402 transitions. Word has length 110 [2022-03-19 10:35:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:42,043 INFO L478 AbstractCegarLoop]: Abstraction has 2630 states and 3402 transitions. [2022-03-19 10:35:42,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 10:35:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 3402 transitions. [2022-03-19 10:35:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:35:42,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:42,045 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-19 10:35:42,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:42,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-19 10:35:42,259 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1581009068, now seen corresponding path program 11 times [2022-03-19 10:35:42,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:42,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [228217526] [2022-03-19 10:35:42,260 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1581009068, now seen corresponding path program 12 times [2022-03-19 10:35:42,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:42,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805886393] [2022-03-19 10:35:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:42,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:42,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:42,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558438350] [2022-03-19 10:35:42,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:35:42,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:42,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:42,267 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:42,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 10:35:42,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:35:42,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-19 10:35:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 89 proven. 81 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 10:35:43,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:35:50,177 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:35:50,181 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:35:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 89 proven. 81 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 10:35:55,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:35:55,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805886393] [2022-03-19 10:35:55,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:35:55,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558438350] [2022-03-19 10:35:55,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558438350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:35:55,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:35:55,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 37 [2022-03-19 10:35:55,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:35:55,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [228217526] [2022-03-19 10:35:55,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [228217526] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:35:55,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:35:55,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 10:35:55,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116232136] [2022-03-19 10:35:55,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:35:55,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 10:35:55,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:55,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 10:35:55,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 10:35:55,719 INFO L87 Difference]: Start difference. First operand 2630 states and 3402 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 10:35:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:35:57,324 INFO L93 Difference]: Finished difference Result 2778 states and 3585 transitions. [2022-03-19 10:35:57,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 10:35:57,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 115 [2022-03-19 10:35:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:35:57,332 INFO L225 Difference]: With dead ends: 2778 [2022-03-19 10:35:57,332 INFO L226 Difference]: Without dead ends: 2771 [2022-03-19 10:35:57,333 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 10:35:57,333 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 98 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:35:57,333 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 937 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 10:35:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2022-03-19 10:35:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2709. [2022-03-19 10:35:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 1888 states have (on average 1.2139830508474576) internal successors, (2292), 1913 states have internal predecessors, (2292), 604 states have call successors, (604), 217 states have call predecessors, (604), 216 states have return successors, (598), 578 states have call predecessors, (598), 598 states have call successors, (598) [2022-03-19 10:35:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 3494 transitions. [2022-03-19 10:35:57,786 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 3494 transitions. Word has length 115 [2022-03-19 10:35:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:35:57,786 INFO L478 AbstractCegarLoop]: Abstraction has 2709 states and 3494 transitions. [2022-03-19 10:35:57,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 10:35:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 3494 transitions. [2022-03-19 10:35:57,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 10:35:57,788 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:35:57,788 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-19 10:35:57,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 10:35:58,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 10:35:58,002 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:35:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:35:58,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1307868536, now seen corresponding path program 13 times [2022-03-19 10:35:58,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:35:58,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1196964715] [2022-03-19 10:35:58,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:35:58,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1307868536, now seen corresponding path program 14 times [2022-03-19 10:35:58,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:35:58,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970579917] [2022-03-19 10:35:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:35:58,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:35:58,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:35:58,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723441671] [2022-03-19 10:35:58,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:35:58,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:35:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:35:58,010 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:35:58,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 10:35:58,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:35:58,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:35:58,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-19 10:35:58,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:35:58,514 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:35:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 97 proven. 85 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-03-19 10:35:59,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 130 proven. 19 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 10:36:06,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:06,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970579917] [2022-03-19 10:36:06,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:06,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723441671] [2022-03-19 10:36:06,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723441671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:06,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:06,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 36 [2022-03-19 10:36:06,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:06,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1196964715] [2022-03-19 10:36:06,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1196964715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:06,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:06,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 10:36:06,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890884472] [2022-03-19 10:36:06,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:06,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 10:36:06,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:06,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 10:36:06,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 10:36:06,454 INFO L87 Difference]: Start difference. First operand 2709 states and 3494 transitions. Second operand has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 10:36:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:08,433 INFO L93 Difference]: Finished difference Result 2979 states and 3842 transitions. [2022-03-19 10:36:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 10:36:08,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 115 [2022-03-19 10:36:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:08,439 INFO L225 Difference]: With dead ends: 2979 [2022-03-19 10:36:08,439 INFO L226 Difference]: Without dead ends: 2976 [2022-03-19 10:36:08,440 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=303, Invalid=1677, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 10:36:08,440 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 133 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:08,440 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 828 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 10:36:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2022-03-19 10:36:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2912. [2022-03-19 10:36:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2020 states have (on average 1.2103960396039604) internal successors, (2445), 2046 states have internal predecessors, (2445), 654 states have call successors, (654), 238 states have call predecessors, (654), 237 states have return successors, (648), 627 states have call predecessors, (648), 648 states have call successors, (648) [2022-03-19 10:36:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 3747 transitions. [2022-03-19 10:36:08,944 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 3747 transitions. Word has length 115 [2022-03-19 10:36:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:08,945 INFO L478 AbstractCegarLoop]: Abstraction has 2912 states and 3747 transitions. [2022-03-19 10:36:08,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 10:36:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 3747 transitions. [2022-03-19 10:36:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 10:36:08,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:08,947 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 3, 3, 3, 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, 1] [2022-03-19 10:36:08,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 10:36:09,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-19 10:36:09,147 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:09,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash -349274797, now seen corresponding path program 3 times [2022-03-19 10:36:09,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:09,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1541462946] [2022-03-19 10:36:09,148 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash -349274797, now seen corresponding path program 4 times [2022-03-19 10:36:09,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:09,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594750256] [2022-03-19 10:36:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:09,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:09,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178992069] [2022-03-19 10:36:09,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:36:09,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:09,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:09,196 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:09,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 10:36:09,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:36:09,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 10:36:09,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 262 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-19 10:36:09,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 70 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:36:09,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:09,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594750256] [2022-03-19 10:36:09,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:09,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178992069] [2022-03-19 10:36:09,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178992069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:09,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:09,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-03-19 10:36:09,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:09,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1541462946] [2022-03-19 10:36:09,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1541462946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:09,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:09,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 10:36:09,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842166177] [2022-03-19 10:36:09,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:09,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 10:36:09,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:09,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 10:36:09,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:36:09,751 INFO L87 Difference]: Start difference. First operand 2912 states and 3747 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:36:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:10,456 INFO L93 Difference]: Finished difference Result 2925 states and 3756 transitions. [2022-03-19 10:36:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 10:36:10,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 121 [2022-03-19 10:36:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:10,463 INFO L225 Difference]: With dead ends: 2925 [2022-03-19 10:36:10,463 INFO L226 Difference]: Without dead ends: 2918 [2022-03-19 10:36:10,464 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=428, Invalid=628, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 10:36:10,464 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 227 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:10,464 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 382 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:36:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2022-03-19 10:36:10,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2912. [2022-03-19 10:36:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2020 states have (on average 1.2074257425742574) internal successors, (2439), 2046 states have internal predecessors, (2439), 654 states have call successors, (654), 238 states have call predecessors, (654), 237 states have return successors, (648), 627 states have call predecessors, (648), 648 states have call successors, (648) [2022-03-19 10:36:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 3741 transitions. [2022-03-19 10:36:10,977 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 3741 transitions. Word has length 121 [2022-03-19 10:36:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:10,977 INFO L478 AbstractCegarLoop]: Abstraction has 2912 states and 3741 transitions. [2022-03-19 10:36:10,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:36:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 3741 transitions. [2022-03-19 10:36:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 10:36:10,979 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:10,979 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 3, 3, 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, 1] [2022-03-19 10:36:10,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 10:36:11,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:11,187 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:11,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2042365659, now seen corresponding path program 15 times [2022-03-19 10:36:11,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:11,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [295530455] [2022-03-19 10:36:11,188 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:11,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2042365659, now seen corresponding path program 16 times [2022-03-19 10:36:11,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:11,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340358196] [2022-03-19 10:36:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:11,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:11,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:11,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945359279] [2022-03-19 10:36:11,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:36:11,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:11,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:11,194 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:11,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 10:36:11,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:36:11,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:11,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-19 10:36:11,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:15,181 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:36:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 86 proven. 110 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-19 10:36:16,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:17,601 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:36:19,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:19,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340358196] [2022-03-19 10:36:19,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:19,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945359279] [2022-03-19 10:36:19,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945359279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:36:19,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:36:19,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-19 10:36:19,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:19,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [295530455] [2022-03-19 10:36:19,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [295530455] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:19,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:19,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 10:36:19,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041325241] [2022-03-19 10:36:19,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:19,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 10:36:19,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:19,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 10:36:19,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 10:36:19,366 INFO L87 Difference]: Start difference. First operand 2912 states and 3741 transitions. Second operand has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-19 10:36:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:29,367 INFO L93 Difference]: Finished difference Result 3037 states and 3905 transitions. [2022-03-19 10:36:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 10:36:29,368 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 122 [2022-03-19 10:36:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:29,377 INFO L225 Difference]: With dead ends: 3037 [2022-03-19 10:36:29,377 INFO L226 Difference]: Without dead ends: 3034 [2022-03-19 10:36:29,379 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 10:36:29,379 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 155 mSDsluCounter, 1594 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:29,379 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1682 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1999 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-19 10:36:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2022-03-19 10:36:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 2998. [2022-03-19 10:36:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2077 states have (on average 1.2103996148290803) internal successors, (2514), 2104 states have internal predecessors, (2514), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-19 10:36:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 3860 transitions. [2022-03-19 10:36:29,981 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 3860 transitions. Word has length 122 [2022-03-19 10:36:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:29,981 INFO L478 AbstractCegarLoop]: Abstraction has 2998 states and 3860 transitions. [2022-03-19 10:36:29,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-19 10:36:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 3860 transitions. [2022-03-19 10:36:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-19 10:36:29,983 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:29,983 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 4, 3, 3, 3, 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] [2022-03-19 10:36:30,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-19 10:36:30,184 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-19 10:36:30,184 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash -598915707, now seen corresponding path program 9 times [2022-03-19 10:36:30,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:30,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2062303933] [2022-03-19 10:36:30,185 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash -598915707, now seen corresponding path program 10 times [2022-03-19 10:36:30,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:30,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106250286] [2022-03-19 10:36:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:30,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:30,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:30,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226962555] [2022-03-19 10:36:30,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:36:30,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:30,192 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:30,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 10:36:30,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:36:30,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:30,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 10:36:30,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 279 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-19 10:36:30,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 87 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:36:30,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:30,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106250286] [2022-03-19 10:36:30,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:30,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226962555] [2022-03-19 10:36:30,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226962555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:30,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:30,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-19 10:36:30,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:30,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2062303933] [2022-03-19 10:36:30,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2062303933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:30,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:30,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:36:30,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696657977] [2022-03-19 10:36:30,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:30,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:36:30,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:30,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:36:30,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:36:30,723 INFO L87 Difference]: Start difference. First operand 2998 states and 3860 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:36:31,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:31,601 INFO L93 Difference]: Finished difference Result 3075 states and 3938 transitions. [2022-03-19 10:36:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 10:36:31,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 125 [2022-03-19 10:36:31,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:31,607 INFO L225 Difference]: With dead ends: 3075 [2022-03-19 10:36:31,607 INFO L226 Difference]: Without dead ends: 3068 [2022-03-19 10:36:31,608 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=449, Invalid=673, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 10:36:31,608 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 316 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:31,608 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 381 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:36:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2022-03-19 10:36:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 3004. [2022-03-19 10:36:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 2083 states have (on average 1.2097935669707154) internal successors, (2520), 2110 states have internal predecessors, (2520), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-19 10:36:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 3866 transitions. [2022-03-19 10:36:32,170 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 3866 transitions. Word has length 125 [2022-03-19 10:36:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:32,171 INFO L478 AbstractCegarLoop]: Abstraction has 3004 states and 3866 transitions. [2022-03-19 10:36:32,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:36:32,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 3866 transitions. [2022-03-19 10:36:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 10:36:32,173 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:32,173 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 4, 4, 4, 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, 1, 1] [2022-03-19 10:36:32,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-19 10:36:32,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 10:36:32,374 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:32,374 INFO L85 PathProgramCache]: Analyzing trace with hash -343429313, now seen corresponding path program 3 times [2022-03-19 10:36:32,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:32,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1547476294] [2022-03-19 10:36:32,374 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash -343429313, now seen corresponding path program 4 times [2022-03-19 10:36:32,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:32,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111681681] [2022-03-19 10:36:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:32,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:32,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:32,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497068060] [2022-03-19 10:36:32,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:36:32,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:32,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:32,384 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:32,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 10:36:32,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:36:32,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 10:36:32,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 275 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-19 10:36:32,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 83 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:36:32,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:32,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111681681] [2022-03-19 10:36:32,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:32,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497068060] [2022-03-19 10:36:32,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497068060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:32,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:32,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-03-19 10:36:32,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:32,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1547476294] [2022-03-19 10:36:32,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1547476294] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:32,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:32,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:36:32,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069474894] [2022-03-19 10:36:32,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:32,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:36:32,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:32,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:36:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:36:32,972 INFO L87 Difference]: Start difference. First operand 3004 states and 3866 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:36:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:33,818 INFO L93 Difference]: Finished difference Result 3658 states and 4844 transitions. [2022-03-19 10:36:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 10:36:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 127 [2022-03-19 10:36:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:33,826 INFO L225 Difference]: With dead ends: 3658 [2022-03-19 10:36:33,826 INFO L226 Difference]: Without dead ends: 3089 [2022-03-19 10:36:33,828 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=447, Invalid=675, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 10:36:33,828 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 302 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:33,828 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 387 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:36:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2022-03-19 10:36:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 3069. [2022-03-19 10:36:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 2148 states have (on average 1.202513966480447) internal successors, (2583), 2175 states have internal predecessors, (2583), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-19 10:36:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 3929 transitions. [2022-03-19 10:36:34,445 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 3929 transitions. Word has length 127 [2022-03-19 10:36:34,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:34,445 INFO L478 AbstractCegarLoop]: Abstraction has 3069 states and 3929 transitions. [2022-03-19 10:36:34,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:36:34,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 3929 transitions. [2022-03-19 10:36:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 10:36:34,448 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:34,448 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-03-19 10:36:34,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 10:36:34,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 10:36:34,655 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash 410495670, now seen corresponding path program 17 times [2022-03-19 10:36:34,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:34,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2027978320] [2022-03-19 10:36:34,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash 410495670, now seen corresponding path program 18 times [2022-03-19 10:36:34,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:34,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609678834] [2022-03-19 10:36:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:34,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:34,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:34,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017666443] [2022-03-19 10:36:34,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:36:34,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:34,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:34,663 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:34,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 10:36:34,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:36:34,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:34,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 10:36:34,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 250 proven. 21 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-19 10:36:34,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 66 proven. 21 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 10:36:35,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:36:35,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609678834] [2022-03-19 10:36:35,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:36:35,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017666443] [2022-03-19 10:36:35,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017666443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:36:35,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:36:35,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-19 10:36:35,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:36:35,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2027978320] [2022-03-19 10:36:35,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2027978320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:36:35,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:36:35,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 10:36:35,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927791299] [2022-03-19 10:36:35,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:36:35,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 10:36:35,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 10:36:35,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:36:35,110 INFO L87 Difference]: Start difference. First operand 3069 states and 3929 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-19 10:36:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:36:36,102 INFO L93 Difference]: Finished difference Result 4973 states and 6641 transitions. [2022-03-19 10:36:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:36:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 131 [2022-03-19 10:36:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:36:36,112 INFO L225 Difference]: With dead ends: 4973 [2022-03-19 10:36:36,113 INFO L226 Difference]: Without dead ends: 3549 [2022-03-19 10:36:36,115 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:36:36,116 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 25 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:36:36,116 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 333 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:36:36,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2022-03-19 10:36:36,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3240. [2022-03-19 10:36:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 2249 states have (on average 1.2249888839484215) internal successors, (2755), 2282 states have internal predecessors, (2755), 770 states have call successors, (770), 222 states have call predecessors, (770), 220 states have return successors, (764), 735 states have call predecessors, (764), 764 states have call successors, (764) [2022-03-19 10:36:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 4289 transitions. [2022-03-19 10:36:36,803 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 4289 transitions. Word has length 131 [2022-03-19 10:36:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:36:36,803 INFO L478 AbstractCegarLoop]: Abstraction has 3240 states and 4289 transitions. [2022-03-19 10:36:36,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-19 10:36:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 4289 transitions. [2022-03-19 10:36:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 10:36:36,805 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:36:36,805 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-03-19 10:36:36,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-19 10:36:37,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-19 10:36:37,019 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:36:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:36:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 419861042, now seen corresponding path program 19 times [2022-03-19 10:36:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:36:37,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414285082] [2022-03-19 10:36:37,020 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:36:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 419861042, now seen corresponding path program 20 times [2022-03-19 10:36:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:36:37,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237553761] [2022-03-19 10:36:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:36:37,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:36:37,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:36:37,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758917441] [2022-03-19 10:36:37,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:36:37,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:36:37,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:36:37,026 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:36:37,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 10:36:37,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:36:37,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:36:37,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-19 10:36:37,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:36:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 127 proven. 107 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-19 10:36:40,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:36:47,934 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:36:47,937 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:37:20,621 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (div (+ c_main_~b~0 (* (- 1) c_main_~c~0)) (- 4)))) (let ((.cse0 (div .cse3 c_main_~b~0))) (let ((.cse7 (* .cse0 4))) (let ((.cse4 (* c_main_~q~0 c_main_~x~0)) (.cse6 (+ .cse7 c_main_~k~0)) (.cse5 (* c_main_~s~0 c_main_~y~0)) (.cse1 (* c_main_~p~0 c_main_~x~0)) (.cse2 (* c_main_~r~0 c_main_~y~0))) (or (not (= (mod (+ (* 3 c_main_~c~0) c_main_~b~0) 4) 0)) (not (= (* .cse0 c_main_~b~0 2) (* 2 c_main_~v~0))) (<= c_main_~c~0 (* (* .cse0 c_main_~b~0) 4)) (not (= (+ .cse1 .cse2) c_main_~a~0)) (= c_main_~b~0 0) (not (= (mod .cse3 c_main_~b~0) 0)) (not (= c_main_~b~0 (+ .cse4 .cse5))) (not (= (+ (* .cse6 c_main_~b~0) (* (- 1) (* c_main_~b~0 .cse7)) c_main_~c~0) c_main_~a~0)) (= (+ (* .cse4 2) (* .cse6 c_main_~s~0 c_main_~y~0) (* .cse6 c_main_~q~0 c_main_~x~0) (* 2 .cse5)) (+ c_main_~b~0 .cse1 .cse2))))))) is different from true [2022-03-19 10:38:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 133 proven. 86 refuted. 0 times theorem prover too weak. 340 trivial. 12 not checked. [2022-03-19 10:38:37,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:38:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237553761] [2022-03-19 10:38:37,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:38:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758917441] [2022-03-19 10:38:37,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758917441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:38:37,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:38:37,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 36 [2022-03-19 10:38:37,924 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:38:37,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414285082] [2022-03-19 10:38:37,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414285082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:38:37,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:38:37,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 10:38:37,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974995811] [2022-03-19 10:38:37,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:38:37,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 10:38:37,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:38:37,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 10:38:37,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=984, Unknown=2, NotChecked=66, Total=1260 [2022-03-19 10:38:37,925 INFO L87 Difference]: Start difference. First operand 3240 states and 4289 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:38:42,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:38:42,124 INFO L93 Difference]: Finished difference Result 3374 states and 4467 transitions. [2022-03-19 10:38:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 10:38:42,125 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 131 [2022-03-19 10:38:42,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:38:42,132 INFO L225 Difference]: With dead ends: 3374 [2022-03-19 10:38:42,132 INFO L226 Difference]: Without dead ends: 3369 [2022-03-19 10:38:42,133 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=268, Invalid=1374, Unknown=2, NotChecked=78, Total=1722 [2022-03-19 10:38:42,133 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 99 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:38:42,133 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1066 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 10:38:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2022-03-19 10:38:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3351. [2022-03-19 10:38:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 2316 states have (on average 1.2258203799654577) internal successors, (2839), 2350 states have internal predecessors, (2839), 803 states have call successors, (803), 232 states have call predecessors, (803), 231 states have return successors, (798), 768 states have call predecessors, (798), 798 states have call successors, (798) [2022-03-19 10:38:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4440 transitions. [2022-03-19 10:38:42,883 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4440 transitions. Word has length 131 [2022-03-19 10:38:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:38:42,884 INFO L478 AbstractCegarLoop]: Abstraction has 3351 states and 4440 transitions. [2022-03-19 10:38:42,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:38:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4440 transitions. [2022-03-19 10:38:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-19 10:38:42,886 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:38:42,886 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 10:38:42,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 10:38:43,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:38:43,104 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:38:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:38:43,104 INFO L85 PathProgramCache]: Analyzing trace with hash 233578743, now seen corresponding path program 21 times [2022-03-19 10:38:43,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:38:43,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1809717482] [2022-03-19 10:38:43,105 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:38:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash 233578743, now seen corresponding path program 22 times [2022-03-19 10:38:43,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:38:43,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808132522] [2022-03-19 10:38:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:38:43,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:38:43,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:38:43,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649303670] [2022-03-19 10:38:43,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:38:43,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:38:43,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:38:43,116 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:38:43,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 10:38:43,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:38:43,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:38:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-19 10:38:43,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:38:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 103 proven. 134 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-19 10:38:44,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:38:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 117 proven. 90 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-03-19 10:38:46,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:38:46,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808132522] [2022-03-19 10:38:46,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:38:46,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649303670] [2022-03-19 10:38:46,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649303670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:38:46,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:38:46,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2022-03-19 10:38:46,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:38:46,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1809717482] [2022-03-19 10:38:46,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1809717482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:38:46,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:38:46,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 10:38:46,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498843] [2022-03-19 10:38:46,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:38:46,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 10:38:46,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:38:46,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 10:38:46,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:38:46,991 INFO L87 Difference]: Start difference. First operand 3351 states and 4440 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:38:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:38:50,589 INFO L93 Difference]: Finished difference Result 3487 states and 4616 transitions. [2022-03-19 10:38:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:38:50,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 134 [2022-03-19 10:38:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:38:50,597 INFO L225 Difference]: With dead ends: 3487 [2022-03-19 10:38:50,597 INFO L226 Difference]: Without dead ends: 3484 [2022-03-19 10:38:50,598 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 10:38:50,598 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 103 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:38:50,598 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 1277 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 10:38:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3484 states. [2022-03-19 10:38:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3484 to 3372. [2022-03-19 10:38:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 2333 states have (on average 1.2228889841405914) internal successors, (2853), 2369 states have internal predecessors, (2853), 800 states have call successors, (800), 239 states have call predecessors, (800), 238 states have return successors, (795), 763 states have call predecessors, (795), 795 states have call successors, (795) [2022-03-19 10:38:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 4448 transitions. [2022-03-19 10:38:51,359 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 4448 transitions. Word has length 134 [2022-03-19 10:38:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:38:51,359 INFO L478 AbstractCegarLoop]: Abstraction has 3372 states and 4448 transitions. [2022-03-19 10:38:51,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:38:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 4448 transitions. [2022-03-19 10:38:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 10:38:51,361 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:38:51,361 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 6, 5, 4, 4, 4, 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] [2022-03-19 10:38:51,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 10:38:51,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-19 10:38:51,562 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:38:51,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:38:51,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1399729945, now seen corresponding path program 9 times [2022-03-19 10:38:51,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:38:51,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [454775206] [2022-03-19 10:38:51,563 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:38:51,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1399729945, now seen corresponding path program 10 times [2022-03-19 10:38:51,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:38:51,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495570686] [2022-03-19 10:38:51,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:38:51,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:38:51,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:38:51,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540538447] [2022-03-19 10:38:51,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:38:51,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:38:51,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:38:51,569 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:38:51,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 10:38:51,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:38:51,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:38:51,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 10:38:51,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:38:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 35 proven. 294 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-19 10:38:51,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:38:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 35 proven. 102 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:38:52,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:38:52,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495570686] [2022-03-19 10:38:52,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:38:52,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540538447] [2022-03-19 10:38:52,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540538447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:38:52,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:38:52,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-19 10:38:52,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:38:52,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [454775206] [2022-03-19 10:38:52,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [454775206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:38:52,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:38:52,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 10:38:52,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499556455] [2022-03-19 10:38:52,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:38:52,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 10:38:52,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:38:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 10:38:52,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:38:52,203 INFO L87 Difference]: Start difference. First operand 3372 states and 4448 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:38:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:38:53,391 INFO L93 Difference]: Finished difference Result 4559 states and 6225 transitions. [2022-03-19 10:38:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 10:38:53,392 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 131 [2022-03-19 10:38:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:38:53,400 INFO L225 Difference]: With dead ends: 4559 [2022-03-19 10:38:53,400 INFO L226 Difference]: Without dead ends: 3862 [2022-03-19 10:38:53,402 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=468, Invalid=722, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 10:38:53,402 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 413 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:38:53,403 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 420 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:38:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2022-03-19 10:38:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3673. [2022-03-19 10:38:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 2456 states have (on average 1.22557003257329) internal successors, (3010), 2499 states have internal predecessors, (3010), 944 states have call successors, (944), 273 states have call predecessors, (944), 272 states have return successors, (938), 900 states have call predecessors, (938), 938 states have call successors, (938) [2022-03-19 10:38:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 4892 transitions. [2022-03-19 10:38:54,221 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 4892 transitions. Word has length 131 [2022-03-19 10:38:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:38:54,221 INFO L478 AbstractCegarLoop]: Abstraction has 3673 states and 4892 transitions. [2022-03-19 10:38:54,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:38:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 4892 transitions. [2022-03-19 10:38:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-19 10:38:54,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:38:54,224 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:38:54,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-19 10:38:54,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:38:54,441 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:38:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:38:54,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1440640833, now seen corresponding path program 1 times [2022-03-19 10:38:54,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:38:54,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [225931078] [2022-03-19 10:38:54,442 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:38:54,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1440640833, now seen corresponding path program 2 times [2022-03-19 10:38:54,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:38:54,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628607235] [2022-03-19 10:38:54,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:38:54,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:38:54,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:38:54,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039498548] [2022-03-19 10:38:54,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:38:54,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:38:54,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:38:54,448 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:38:54,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 10:38:54,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:38:54,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:38:54,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-19 10:38:54,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:38:58,415 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:38:58,422 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:38:58,423 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:38:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 105 proven. 141 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-19 10:38:58,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:38:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 145 proven. 21 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 10:38:59,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:38:59,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628607235] [2022-03-19 10:38:59,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:38:59,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039498548] [2022-03-19 10:38:59,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039498548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:38:59,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:38:59,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 30 [2022-03-19 10:38:59,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:38:59,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [225931078] [2022-03-19 10:38:59,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [225931078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:38:59,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:38:59,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 10:38:59,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562068332] [2022-03-19 10:38:59,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:38:59,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 10:38:59,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:38:59,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 10:38:59,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-19 10:38:59,618 INFO L87 Difference]: Start difference. First operand 3673 states and 4892 transitions. Second operand has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-19 10:39:03,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:39:05,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:39:05,410 INFO L93 Difference]: Finished difference Result 3906 states and 5212 transitions. [2022-03-19 10:39:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:39:05,411 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 132 [2022-03-19 10:39:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:39:05,417 INFO L225 Difference]: With dead ends: 3906 [2022-03-19 10:39:05,418 INFO L226 Difference]: Without dead ends: 3904 [2022-03-19 10:39:05,418 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 10:39:05,419 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 123 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:39:05,419 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1641 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1715 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-03-19 10:39:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2022-03-19 10:39:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 3758. [2022-03-19 10:39:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 2512 states have (on average 1.2261146496815287) internal successors, (3080), 2556 states have internal predecessors, (3080), 965 states have call successors, (965), 281 states have call predecessors, (965), 280 states have return successors, (959), 920 states have call predecessors, (959), 959 states have call successors, (959) [2022-03-19 10:39:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 5004 transitions. [2022-03-19 10:39:06,255 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 5004 transitions. Word has length 132 [2022-03-19 10:39:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:39:06,255 INFO L478 AbstractCegarLoop]: Abstraction has 3758 states and 5004 transitions. [2022-03-19 10:39:06,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-19 10:39:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 5004 transitions. [2022-03-19 10:39:06,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-19 10:39:06,257 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:39:06,257 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 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] [2022-03-19 10:39:06,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-19 10:39:06,457 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:39:06,458 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:39:06,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:39:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash 862891816, now seen corresponding path program 11 times [2022-03-19 10:39:06,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:39:06,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1137311600] [2022-03-19 10:39:06,459 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:39:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash 862891816, now seen corresponding path program 12 times [2022-03-19 10:39:06,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:39:06,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605450337] [2022-03-19 10:39:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:39:06,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:39:06,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:39:06,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207748423] [2022-03-19 10:39:06,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:39:06,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:39:06,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:39:06,466 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:39:06,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 10:39:06,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:39:06,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:39:06,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 10:39:06,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:39:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-19 10:39:06,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:39:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:39:07,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:39:07,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605450337] [2022-03-19 10:39:07,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:39:07,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207748423] [2022-03-19 10:39:07,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207748423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:39:07,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:39:07,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-19 10:39:07,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:39:07,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1137311600] [2022-03-19 10:39:07,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1137311600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:39:07,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:39:07,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:39:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809282599] [2022-03-19 10:39:07,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:39:07,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:39:07,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:39:07,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:39:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:39:07,219 INFO L87 Difference]: Start difference. First operand 3758 states and 5004 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:39:08,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:39:08,563 INFO L93 Difference]: Finished difference Result 4545 states and 6055 transitions. [2022-03-19 10:39:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 10:39:08,564 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 132 [2022-03-19 10:39:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:39:08,571 INFO L225 Difference]: With dead ends: 4545 [2022-03-19 10:39:08,571 INFO L226 Difference]: Without dead ends: 4538 [2022-03-19 10:39:08,572 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=491, Invalid=769, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 10:39:08,572 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 430 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:39:08,572 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 436 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:39:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2022-03-19 10:39:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 4322. [2022-03-19 10:39:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 2865 states have (on average 1.2275741710296684) internal successors, (3517), 2953 states have internal predecessors, (3517), 1139 states have call successors, (1139), 318 states have call predecessors, (1139), 317 states have return successors, (1132), 1050 states have call predecessors, (1132), 1132 states have call successors, (1132) [2022-03-19 10:39:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 5788 transitions. [2022-03-19 10:39:09,506 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 5788 transitions. Word has length 132 [2022-03-19 10:39:09,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:39:09,507 INFO L478 AbstractCegarLoop]: Abstraction has 4322 states and 5788 transitions. [2022-03-19 10:39:09,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:39:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 5788 transitions. [2022-03-19 10:39:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 10:39:09,509 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:39:09,509 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-03-19 10:39:09,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-19 10:39:09,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:39:09,717 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:39:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:39:09,717 INFO L85 PathProgramCache]: Analyzing trace with hash 68245470, now seen corresponding path program 3 times [2022-03-19 10:39:09,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:39:09,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393101616] [2022-03-19 10:39:09,717 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:39:09,717 INFO L85 PathProgramCache]: Analyzing trace with hash 68245470, now seen corresponding path program 4 times [2022-03-19 10:39:09,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:39:09,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607258977] [2022-03-19 10:39:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:39:09,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:39:09,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:39:09,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116359825] [2022-03-19 10:39:09,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:39:09,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:39:09,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:39:09,723 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:39:09,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 10:39:09,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:39:09,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:39:09,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 10:39:09,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:39:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 49 proven. 286 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-19 10:39:10,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:39:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 49 proven. 94 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:39:10,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:39:10,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607258977] [2022-03-19 10:39:10,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:39:10,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116359825] [2022-03-19 10:39:10,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116359825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:39:10,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:39:10,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-03-19 10:39:10,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:39:10,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393101616] [2022-03-19 10:39:10,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393101616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:39:10,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:39:10,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 10:39:10,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504198794] [2022-03-19 10:39:10,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:39:10,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 10:39:10,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:39:10,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 10:39:10,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:39:10,371 INFO L87 Difference]: Start difference. First operand 4322 states and 5788 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:39:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:39:11,646 INFO L93 Difference]: Finished difference Result 5509 states and 7644 transitions. [2022-03-19 10:39:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 10:39:11,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 133 [2022-03-19 10:39:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:39:11,654 INFO L225 Difference]: With dead ends: 5509 [2022-03-19 10:39:11,654 INFO L226 Difference]: Without dead ends: 4328 [2022-03-19 10:39:11,657 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=467, Invalid=723, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 10:39:11,663 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 319 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:39:11,663 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 428 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:39:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2022-03-19 10:39:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4306. [2022-03-19 10:39:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 2852 states have (on average 1.2100280504908836) internal successors, (3451), 2939 states have internal predecessors, (3451), 1137 states have call successors, (1137), 317 states have call predecessors, (1137), 316 states have return successors, (1130), 1049 states have call predecessors, (1130), 1130 states have call successors, (1130) [2022-03-19 10:39:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 5718 transitions. [2022-03-19 10:39:12,655 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 5718 transitions. Word has length 133 [2022-03-19 10:39:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:39:12,656 INFO L478 AbstractCegarLoop]: Abstraction has 4306 states and 5718 transitions. [2022-03-19 10:39:12,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:39:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 5718 transitions. [2022-03-19 10:39:12,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 10:39:12,658 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:39:12,658 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-03-19 10:39:12,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-19 10:39:12,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:39:12,858 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:39:12,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:39:12,858 INFO L85 PathProgramCache]: Analyzing trace with hash -263391851, now seen corresponding path program 23 times [2022-03-19 10:39:12,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:39:12,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [904397060] [2022-03-19 10:39:12,859 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:39:12,859 INFO L85 PathProgramCache]: Analyzing trace with hash -263391851, now seen corresponding path program 24 times [2022-03-19 10:39:12,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:39:12,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973441847] [2022-03-19 10:39:12,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:39:12,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:39:12,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:39:12,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25157749] [2022-03-19 10:39:12,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:39:12,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:39:12,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:39:12,865 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:39:12,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 10:39:12,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 10:39:12,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:39:12,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-19 10:39:12,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:39:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 72 proven. 115 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-19 10:39:15,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:39:24,671 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:39:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 72 proven. 115 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-19 10:39:29,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:39:29,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973441847] [2022-03-19 10:39:29,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:39:29,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25157749] [2022-03-19 10:39:29,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25157749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:39:29,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:39:29,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2022-03-19 10:39:29,740 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:39:29,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [904397060] [2022-03-19 10:39:29,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [904397060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:39:29,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:39:29,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 10:39:29,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566139045] [2022-03-19 10:39:29,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:39:29,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 10:39:29,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:39:29,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 10:39:29,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 10:39:29,741 INFO L87 Difference]: Start difference. First operand 4306 states and 5718 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:39:32,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:39:32,461 INFO L93 Difference]: Finished difference Result 4466 states and 5936 transitions. [2022-03-19 10:39:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:39:32,462 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 138 [2022-03-19 10:39:32,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:39:32,484 INFO L225 Difference]: With dead ends: 4466 [2022-03-19 10:39:32,484 INFO L226 Difference]: Without dead ends: 4459 [2022-03-19 10:39:32,484 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 10:39:32,485 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 105 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:39:32,485 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 934 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 10:39:32,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4459 states. [2022-03-19 10:39:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4459 to 4306. [2022-03-19 10:39:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 2851 states have (on average 1.2101017186951946) internal successors, (3450), 2938 states have internal predecessors, (3450), 1137 states have call successors, (1137), 318 states have call predecessors, (1137), 317 states have return successors, (1130), 1049 states have call predecessors, (1130), 1130 states have call successors, (1130) [2022-03-19 10:39:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 5717 transitions. [2022-03-19 10:39:33,425 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 5717 transitions. Word has length 138 [2022-03-19 10:39:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:39:33,425 INFO L478 AbstractCegarLoop]: Abstraction has 4306 states and 5717 transitions. [2022-03-19 10:39:33,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:39:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 5717 transitions. [2022-03-19 10:39:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 10:39:33,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:39:33,427 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-03-19 10:39:33,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-19 10:39:33,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-19 10:39:33,628 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:39:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:39:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash -213306419, now seen corresponding path program 25 times [2022-03-19 10:39:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:39:33,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1604078396] [2022-03-19 10:39:33,629 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:39:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash -213306419, now seen corresponding path program 26 times [2022-03-19 10:39:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:39:33,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904051571] [2022-03-19 10:39:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:39:33,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:39:33,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:39:33,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288476767] [2022-03-19 10:39:33,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:39:33,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:39:33,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:39:33,634 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:39:33,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 10:39:33,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:39:33,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:39:33,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-19 10:39:33,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:39:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 125 proven. 158 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-19 10:39:34,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:39:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 181 proven. 33 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2022-03-19 10:39:41,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:39:41,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904051571] [2022-03-19 10:39:41,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:39:41,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288476767] [2022-03-19 10:39:41,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288476767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:39:41,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:39:41,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-03-19 10:39:41,447 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:39:41,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1604078396] [2022-03-19 10:39:41,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1604078396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:39:41,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:39:41,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 10:39:41,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359045895] [2022-03-19 10:39:41,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:39:41,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 10:39:41,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:39:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 10:39:41,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-19 10:39:41,448 INFO L87 Difference]: Start difference. First operand 4306 states and 5717 transitions. Second operand has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 10:39:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:39:43,657 INFO L93 Difference]: Finished difference Result 4497 states and 5957 transitions. [2022-03-19 10:39:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 10:39:43,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 138 [2022-03-19 10:39:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:39:43,665 INFO L225 Difference]: With dead ends: 4497 [2022-03-19 10:39:43,665 INFO L226 Difference]: Without dead ends: 4494 [2022-03-19 10:39:43,666 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 10:39:43,666 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 106 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:39:43,667 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1111 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 10:39:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2022-03-19 10:39:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4378. [2022-03-19 10:39:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 2901 states have (on average 1.2071699413995174) internal successors, (3502), 2990 states have internal predecessors, (3502), 1147 states have call successors, (1147), 330 states have call predecessors, (1147), 329 states have return successors, (1140), 1057 states have call predecessors, (1140), 1140 states have call successors, (1140) [2022-03-19 10:39:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 5789 transitions. [2022-03-19 10:39:44,621 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 5789 transitions. Word has length 138 [2022-03-19 10:39:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:39:44,621 INFO L478 AbstractCegarLoop]: Abstraction has 4378 states and 5789 transitions. [2022-03-19 10:39:44,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 10:39:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 5789 transitions. [2022-03-19 10:39:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 10:39:44,623 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:39:44,623 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-03-19 10:39:44,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-19 10:39:44,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-19 10:39:44,823 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:39:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:39:44,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2103122581, now seen corresponding path program 27 times [2022-03-19 10:39:44,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:39:44,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [431160609] [2022-03-19 10:39:44,825 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:39:44,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2103122581, now seen corresponding path program 28 times [2022-03-19 10:39:44,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:39:44,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233495210] [2022-03-19 10:39:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:39:44,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:39:44,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:39:44,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402642907] [2022-03-19 10:39:44,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:39:44,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:39:44,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:39:44,830 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:39:44,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 10:39:44,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:39:44,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:39:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-19 10:39:44,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:39:45,582 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:39:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 158 proven. 128 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-19 10:39:48,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:39:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 188 proven. 19 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-03-19 10:39:56,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:39:56,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233495210] [2022-03-19 10:39:56,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:39:56,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402642907] [2022-03-19 10:39:56,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402642907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:39:56,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:39:56,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 38 [2022-03-19 10:39:56,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:39:56,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [431160609] [2022-03-19 10:39:56,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [431160609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:39:56,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:39:56,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 10:39:56,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622083320] [2022-03-19 10:39:56,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:39:56,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 10:39:56,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:39:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 10:39:56,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 10:39:56,628 INFO L87 Difference]: Start difference. First operand 4378 states and 5789 transitions. Second operand has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-19 10:40:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:40:02,701 INFO L93 Difference]: Finished difference Result 4640 states and 6130 transitions. [2022-03-19 10:40:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 10:40:02,702 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 138 [2022-03-19 10:40:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:40:02,711 INFO L225 Difference]: With dead ends: 4640 [2022-03-19 10:40:02,711 INFO L226 Difference]: Without dead ends: 4637 [2022-03-19 10:40:02,712 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 10:40:02,712 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 144 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-19 10:40:02,712 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 1670 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-19 10:40:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4637 states. [2022-03-19 10:40:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4637 to 4511. [2022-03-19 10:40:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 2986 states have (on average 1.2069658405894172) internal successors, (3604), 3078 states have internal predecessors, (3604), 1180 states have call successors, (1180), 345 states have call predecessors, (1180), 344 states have return successors, (1173), 1087 states have call predecessors, (1173), 1173 states have call successors, (1173) [2022-03-19 10:40:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 5957 transitions. [2022-03-19 10:40:03,741 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 5957 transitions. Word has length 138 [2022-03-19 10:40:03,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:40:03,741 INFO L478 AbstractCegarLoop]: Abstraction has 4511 states and 5957 transitions. [2022-03-19 10:40:03,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-19 10:40:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 5957 transitions. [2022-03-19 10:40:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-19 10:40:03,743 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:40:03,744 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 10:40:03,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-19 10:40:03,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-19 10:40:03,960 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:40:03,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:40:03,960 INFO L85 PathProgramCache]: Analyzing trace with hash -734961387, now seen corresponding path program 9 times [2022-03-19 10:40:03,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:40:03,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569243950] [2022-03-19 10:40:03,961 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:40:03,961 INFO L85 PathProgramCache]: Analyzing trace with hash -734961387, now seen corresponding path program 10 times [2022-03-19 10:40:03,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:40:03,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655275886] [2022-03-19 10:40:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:40:03,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:40:03,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:40:03,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518049762] [2022-03-19 10:40:03,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:40:03,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:40:03,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:40:03,967 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:40:03,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 10:40:04,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:40:04,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:40:04,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-19 10:40:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:40:11,967 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:40:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 74 proven. 201 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-19 10:40:15,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:40:23,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:40:23,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655275886] [2022-03-19 10:40:23,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:40:23,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518049762] [2022-03-19 10:40:23,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518049762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:40:23,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:40:23,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-19 10:40:23,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:40:23,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569243950] [2022-03-19 10:40:23,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569243950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:40:23,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:40:23,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 10:40:23,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224074952] [2022-03-19 10:40:23,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:40:23,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 10:40:23,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:40:23,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 10:40:23,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=990, Unknown=1, NotChecked=0, Total=1122 [2022-03-19 10:40:23,119 INFO L87 Difference]: Start difference. First operand 4511 states and 5957 transitions. Second operand has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-19 10:40:42,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:40:42,890 INFO L93 Difference]: Finished difference Result 4756 states and 6289 transitions. [2022-03-19 10:40:42,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 10:40:42,891 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 136 [2022-03-19 10:40:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:40:42,899 INFO L225 Difference]: With dead ends: 4756 [2022-03-19 10:40:42,899 INFO L226 Difference]: Without dead ends: 4754 [2022-03-19 10:40:42,900 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=224, Invalid=1845, Unknown=1, NotChecked=0, Total=2070 [2022-03-19 10:40:42,901 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 148 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:40:42,901 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1564 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2022-03-19 10:40:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4754 states. [2022-03-19 10:40:43,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4754 to 4685. [2022-03-19 10:40:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 3098 states have (on average 1.21078114912847) internal successors, (3751), 3194 states have internal predecessors, (3751), 1229 states have call successors, (1229), 358 states have call predecessors, (1229), 357 states have return successors, (1222), 1132 states have call predecessors, (1222), 1222 states have call successors, (1222) [2022-03-19 10:40:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6202 transitions. [2022-03-19 10:40:44,000 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6202 transitions. Word has length 136 [2022-03-19 10:40:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:40:44,000 INFO L478 AbstractCegarLoop]: Abstraction has 4685 states and 6202 transitions. [2022-03-19 10:40:44,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-19 10:40:44,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6202 transitions. [2022-03-19 10:40:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 10:40:44,002 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:40:44,002 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 5, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 10:40:44,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-19 10:40:44,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:40:44,211 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:40:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:40:44,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1876530728, now seen corresponding path program 11 times [2022-03-19 10:40:44,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:40:44,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1386160649] [2022-03-19 10:40:44,212 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:40:44,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1876530728, now seen corresponding path program 12 times [2022-03-19 10:40:44,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:40:44,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994070070] [2022-03-19 10:40:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:40:44,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:40:44,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:40:44,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621840357] [2022-03-19 10:40:44,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:40:44,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:40:44,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:40:44,218 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:40:44,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 10:40:47,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 10:40:47,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:40:47,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 10:40:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:40:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 52 proven. 306 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-19 10:40:48,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:40:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 52 proven. 114 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:40:48,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:40:48,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994070070] [2022-03-19 10:40:48,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:40:48,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621840357] [2022-03-19 10:40:48,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621840357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:40:48,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:40:48,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-03-19 10:40:48,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:40:48,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1386160649] [2022-03-19 10:40:48,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1386160649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:40:48,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:40:48,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:40:48,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624798537] [2022-03-19 10:40:48,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:40:48,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:40:48,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:40:48,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:40:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:40:48,425 INFO L87 Difference]: Start difference. First operand 4685 states and 6202 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:40:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:40:49,959 INFO L93 Difference]: Finished difference Result 6236 states and 8592 transitions. [2022-03-19 10:40:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 10:40:49,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 137 [2022-03-19 10:40:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:40:49,968 INFO L225 Difference]: With dead ends: 6236 [2022-03-19 10:40:49,968 INFO L226 Difference]: Without dead ends: 4946 [2022-03-19 10:40:49,971 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=488, Invalid=772, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 10:40:49,971 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 388 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:40:49,972 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 430 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:40:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2022-03-19 10:40:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 4849. [2022-03-19 10:40:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 3260 states have (on average 1.211042944785276) internal successors, (3948), 3313 states have internal predecessors, (3948), 1229 states have call successors, (1229), 360 states have call predecessors, (1229), 359 states have return successors, (1222), 1175 states have call predecessors, (1222), 1222 states have call successors, (1222) [2022-03-19 10:40:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 6399 transitions. [2022-03-19 10:40:51,169 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 6399 transitions. Word has length 137 [2022-03-19 10:40:51,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:40:51,169 INFO L478 AbstractCegarLoop]: Abstraction has 4849 states and 6399 transitions. [2022-03-19 10:40:51,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:40:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 6399 transitions. [2022-03-19 10:40:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 10:40:51,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:40:51,172 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 6, 5, 5, 5, 4, 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] [2022-03-19 10:40:51,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-19 10:40:51,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:40:51,373 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:40:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:40:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash 414084436, now seen corresponding path program 11 times [2022-03-19 10:40:51,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:40:51,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1825253540] [2022-03-19 10:40:51,374 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:40:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash 414084436, now seen corresponding path program 12 times [2022-03-19 10:40:51,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:40:51,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708190891] [2022-03-19 10:40:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:40:51,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:40:51,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:40:51,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029781256] [2022-03-19 10:40:51,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:40:51,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:40:51,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:40:51,380 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:40:51,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 10:40:52,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-19 10:40:52,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:40:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 10:40:52,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:40:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 329 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-19 10:40:52,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:40:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 137 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:40:53,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:40:53,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708190891] [2022-03-19 10:40:53,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:40:53,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029781256] [2022-03-19 10:40:53,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029781256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:40:53,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:40:53,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-03-19 10:40:53,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:40:53,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1825253540] [2022-03-19 10:40:53,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1825253540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:40:53,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:40:53,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 10:40:53,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397239485] [2022-03-19 10:40:53,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:40:53,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 10:40:53,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:40:53,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 10:40:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:40:53,225 INFO L87 Difference]: Start difference. First operand 4849 states and 6399 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:40:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:40:54,976 INFO L93 Difference]: Finished difference Result 6374 states and 8659 transitions. [2022-03-19 10:40:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 10:40:54,976 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 138 [2022-03-19 10:40:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:40:54,985 INFO L225 Difference]: With dead ends: 6374 [2022-03-19 10:40:54,985 INFO L226 Difference]: Without dead ends: 5677 [2022-03-19 10:40:54,987 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=510, Invalid=822, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 10:40:54,987 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 392 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:40:54,988 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 452 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:40:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5677 states. [2022-03-19 10:40:56,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5677 to 5354. [2022-03-19 10:40:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 3516 states have (on average 1.2070534698521047) internal successors, (4244), 3577 states have internal predecessors, (4244), 1435 states have call successors, (1435), 403 states have call predecessors, (1435), 402 states have return successors, (1427), 1373 states have call predecessors, (1427), 1427 states have call successors, (1427) [2022-03-19 10:40:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 7106 transitions. [2022-03-19 10:40:56,314 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 7106 transitions. Word has length 138 [2022-03-19 10:40:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:40:56,314 INFO L478 AbstractCegarLoop]: Abstraction has 5354 states and 7106 transitions. [2022-03-19 10:40:56,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:40:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 7106 transitions. [2022-03-19 10:40:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-19 10:40:56,316 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:40:56,316 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 10:40:56,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-19 10:40:56,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:40:56,519 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:40:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:40:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash -392647317, now seen corresponding path program 29 times [2022-03-19 10:40:56,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:40:56,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2074887183] [2022-03-19 10:40:56,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:40:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash -392647317, now seen corresponding path program 30 times [2022-03-19 10:40:56,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:40:56,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245846917] [2022-03-19 10:40:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:40:56,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:40:56,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:40:56,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543838758] [2022-03-19 10:40:56,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:40:56,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:40:56,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:40:56,526 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:40:56,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 10:40:56,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:40:56,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:40:56,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-19 10:40:56,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:40:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 46 proven. 116 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-19 10:40:58,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 46 proven. 116 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-19 10:41:06,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:06,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245846917] [2022-03-19 10:41:06,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:06,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543838758] [2022-03-19 10:41:06,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543838758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:06,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:06,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 39 [2022-03-19 10:41:06,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:06,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2074887183] [2022-03-19 10:41:06,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2074887183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:06,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:06,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 10:41:06,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692990956] [2022-03-19 10:41:06,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:06,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 10:41:06,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 10:41:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 10:41:06,864 INFO L87 Difference]: Start difference. First operand 5354 states and 7106 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:41:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:09,598 INFO L93 Difference]: Finished difference Result 5542 states and 7333 transitions. [2022-03-19 10:41:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 10:41:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 142 [2022-03-19 10:41:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:09,608 INFO L225 Difference]: With dead ends: 5542 [2022-03-19 10:41:09,608 INFO L226 Difference]: Without dead ends: 5535 [2022-03-19 10:41:09,609 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 242 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=477, Invalid=2175, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 10:41:09,609 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 127 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:09,609 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 1168 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 10:41:09,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2022-03-19 10:41:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 5392. [2022-03-19 10:41:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 3543 states have (on average 1.2054755856618684) internal successors, (4271), 3604 states have internal predecessors, (4271), 1437 states have call successors, (1437), 412 states have call predecessors, (1437), 411 states have return successors, (1429), 1375 states have call predecessors, (1429), 1429 states have call successors, (1429) [2022-03-19 10:41:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 7137 transitions. [2022-03-19 10:41:10,996 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 7137 transitions. Word has length 142 [2022-03-19 10:41:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:10,996 INFO L478 AbstractCegarLoop]: Abstraction has 5392 states and 7137 transitions. [2022-03-19 10:41:10,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:41:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 7137 transitions. [2022-03-19 10:41:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-19 10:41:10,999 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:10,999 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:11,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-19 10:41:11,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-19 10:41:11,199 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:11,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1045312758, now seen corresponding path program 31 times [2022-03-19 10:41:11,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:11,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [843223906] [2022-03-19 10:41:11,200 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:11,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1045312758, now seen corresponding path program 32 times [2022-03-19 10:41:11,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:11,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523704726] [2022-03-19 10:41:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:11,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:11,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:11,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413808489] [2022-03-19 10:41:11,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:11,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:11,206 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:11,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 10:41:11,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:11,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:11,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-19 10:41:11,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 130 proven. 140 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-19 10:41:13,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:14,474 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:41:16,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523704726] [2022-03-19 10:41:16,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413808489] [2022-03-19 10:41:16,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413808489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:41:16,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:41:16,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-19 10:41:16,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:16,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [843223906] [2022-03-19 10:41:16,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [843223906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:16,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:16,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 10:41:16,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454112555] [2022-03-19 10:41:16,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:16,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 10:41:16,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 10:41:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:41:16,443 INFO L87 Difference]: Start difference. First operand 5392 states and 7137 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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) [2022-03-19 10:41:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:22,172 INFO L93 Difference]: Finished difference Result 5585 states and 7396 transitions. [2022-03-19 10:41:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 10:41:22,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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 145 [2022-03-19 10:41:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:22,185 INFO L225 Difference]: With dead ends: 5585 [2022-03-19 10:41:22,185 INFO L226 Difference]: Without dead ends: 5578 [2022-03-19 10:41:22,186 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 10:41:22,187 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 129 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:22,187 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1710 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1771 Invalid, 0 Unknown, 20 Unchecked, 1.9s Time] [2022-03-19 10:41:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5578 states. [2022-03-19 10:41:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5578 to 5418. [2022-03-19 10:41:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 3563 states have (on average 1.2048835251192815) internal successors, (4293), 3621 states have internal predecessors, (4293), 1443 states have call successors, (1443), 416 states have call predecessors, (1443), 411 states have return successors, (1435), 1380 states have call predecessors, (1435), 1435 states have call successors, (1435) [2022-03-19 10:41:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 7171 transitions. [2022-03-19 10:41:23,571 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 7171 transitions. Word has length 145 [2022-03-19 10:41:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:23,572 INFO L478 AbstractCegarLoop]: Abstraction has 5418 states and 7171 transitions. [2022-03-19 10:41:23,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 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) [2022-03-19 10:41:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 7171 transitions. [2022-03-19 10:41:23,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-19 10:41:23,574 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:23,574 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:23,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:23,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:23,791 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:23,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:23,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1271116242, now seen corresponding path program 33 times [2022-03-19 10:41:23,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:23,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [540372896] [2022-03-19 10:41:23,792 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:23,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1271116242, now seen corresponding path program 34 times [2022-03-19 10:41:23,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:23,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126786323] [2022-03-19 10:41:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:23,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:23,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:23,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759437806] [2022-03-19 10:41:23,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:41:23,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:23,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:23,798 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:23,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-19 10:41:23,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:41:23,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:23,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-19 10:41:23,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:24,616 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:41:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 140 proven. 103 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-03-19 10:41:34,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 198 proven. 19 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-03-19 10:41:40,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:40,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126786323] [2022-03-19 10:41:40,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:40,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759437806] [2022-03-19 10:41:40,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759437806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:40,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:40,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16] total 35 [2022-03-19 10:41:40,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:40,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [540372896] [2022-03-19 10:41:40,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [540372896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:40,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:40,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 10:41:40,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233310574] [2022-03-19 10:41:40,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:40,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 10:41:40,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:40,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 10:41:40,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 10:41:40,593 INFO L87 Difference]: Start difference. First operand 5418 states and 7171 transitions. Second operand has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:41:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:42,840 INFO L93 Difference]: Finished difference Result 5477 states and 7238 transitions. [2022-03-19 10:41:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 10:41:42,841 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 145 [2022-03-19 10:41:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:42,850 INFO L225 Difference]: With dead ends: 5477 [2022-03-19 10:41:42,851 INFO L226 Difference]: Without dead ends: 5470 [2022-03-19 10:41:42,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 10:41:42,852 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 102 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:42,852 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1265 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 541 Invalid, 0 Unknown, 325 Unchecked, 0.4s Time] [2022-03-19 10:41:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5470 states. [2022-03-19 10:41:44,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5470 to 5418. [2022-03-19 10:41:44,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 3563 states have (on average 1.2048835251192815) internal successors, (4293), 3621 states have internal predecessors, (4293), 1443 states have call successors, (1443), 416 states have call predecessors, (1443), 411 states have return successors, (1435), 1380 states have call predecessors, (1435), 1435 states have call successors, (1435) [2022-03-19 10:41:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 7171 transitions. [2022-03-19 10:41:44,251 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 7171 transitions. Word has length 145 [2022-03-19 10:41:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:44,251 INFO L478 AbstractCegarLoop]: Abstraction has 5418 states and 7171 transitions. [2022-03-19 10:41:44,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:41:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 7171 transitions. [2022-03-19 10:41:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 10:41:44,253 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:44,253 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:41:44,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-19 10:41:44,454 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-19 10:41:44,455 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:44,455 INFO L85 PathProgramCache]: Analyzing trace with hash 828416914, now seen corresponding path program 11 times [2022-03-19 10:41:44,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:44,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [554950265] [2022-03-19 10:41:44,455 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:44,456 INFO L85 PathProgramCache]: Analyzing trace with hash 828416914, now seen corresponding path program 12 times [2022-03-19 10:41:44,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:44,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227316659] [2022-03-19 10:41:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:44,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:44,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:44,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977312474] [2022-03-19 10:41:44,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:44,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:44,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:44,461 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:44,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-19 10:41:44,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:41:44,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:44,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 10:41:44,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 166 proven. 50 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-03-19 10:41:44,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:48,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:48,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227316659] [2022-03-19 10:41:48,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:48,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977312474] [2022-03-19 10:41:48,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977312474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:41:48,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:41:48,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 10:41:48,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:48,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [554950265] [2022-03-19 10:41:48,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [554950265] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:48,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:48,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 10:41:48,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111912340] [2022-03-19 10:41:48,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:48,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 10:41:48,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:48,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 10:41:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=199, Unknown=1, NotChecked=0, Total=240 [2022-03-19 10:41:48,673 INFO L87 Difference]: Start difference. First operand 5418 states and 7171 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 10:41:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:51,288 INFO L93 Difference]: Finished difference Result 6170 states and 8256 transitions. [2022-03-19 10:41:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:41:51,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 143 [2022-03-19 10:41:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:51,309 INFO L225 Difference]: With dead ends: 6170 [2022-03-19 10:41:51,309 INFO L226 Difference]: Without dead ends: 6168 [2022-03-19 10:41:51,312 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=111, Invalid=488, Unknown=1, NotChecked=0, Total=600 [2022-03-19 10:41:51,313 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 157 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:51,313 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 363 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 10:41:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6168 states. [2022-03-19 10:41:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6168 to 6051. [2022-03-19 10:41:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6051 states, 4070 states have (on average 1.2331695331695331) internal successors, (5019), 4148 states have internal predecessors, (5019), 1560 states have call successors, (1560), 425 states have call predecessors, (1560), 420 states have return successors, (1552), 1477 states have call predecessors, (1552), 1552 states have call successors, (1552) [2022-03-19 10:41:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6051 states to 6051 states and 8131 transitions. [2022-03-19 10:41:52,882 INFO L78 Accepts]: Start accepts. Automaton has 6051 states and 8131 transitions. Word has length 143 [2022-03-19 10:41:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:52,882 INFO L478 AbstractCegarLoop]: Abstraction has 6051 states and 8131 transitions. [2022-03-19 10:41:52,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 10:41:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 6051 states and 8131 transitions. [2022-03-19 10:41:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-19 10:41:52,885 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:52,885 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 9, 8, 6, 5, 5, 5, 4, 4, 4, 4, 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] [2022-03-19 10:41:52,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-19 10:41:53,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-19 10:41:53,099 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:53,100 INFO L85 PathProgramCache]: Analyzing trace with hash -656443653, now seen corresponding path program 13 times [2022-03-19 10:41:53,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:53,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1106332746] [2022-03-19 10:41:53,100 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:53,100 INFO L85 PathProgramCache]: Analyzing trace with hash -656443653, now seen corresponding path program 14 times [2022-03-19 10:41:53,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:53,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402840295] [2022-03-19 10:41:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:53,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:53,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:53,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194368686] [2022-03-19 10:41:53,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:41:53,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:53,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:53,108 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:53,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-19 10:41:53,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:41:53,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:53,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 10:41:53,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:41:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-19 10:41:53,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:41:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 57 proven. 150 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:41:53,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:41:53,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402840295] [2022-03-19 10:41:53,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:41:53,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194368686] [2022-03-19 10:41:53,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194368686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:41:53,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:41:53,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-03-19 10:41:53,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:41:53,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1106332746] [2022-03-19 10:41:53,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1106332746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:41:53,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:41:53,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 10:41:53,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729814318] [2022-03-19 10:41:53,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:41:53,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 10:41:53,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:53,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 10:41:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:41:53,683 INFO L87 Difference]: Start difference. First operand 6051 states and 8131 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:41:56,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:41:56,084 INFO L93 Difference]: Finished difference Result 9027 states and 12642 transitions. [2022-03-19 10:41:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 10:41:56,085 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 144 [2022-03-19 10:41:56,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:41:56,099 INFO L225 Difference]: With dead ends: 9027 [2022-03-19 10:41:56,099 INFO L226 Difference]: Without dead ends: 7193 [2022-03-19 10:41:56,104 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=530, Invalid=876, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 10:41:56,105 INFO L912 BasicCegarLoop]: 103 mSDtfsCounter, 454 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:41:56,105 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 505 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:41:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7193 states. [2022-03-19 10:41:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7193 to 7078. [2022-03-19 10:41:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 4784 states have (on average 1.223453177257525) internal successors, (5853), 4871 states have internal predecessors, (5853), 1826 states have call successors, (1826), 473 states have call predecessors, (1826), 467 states have return successors, (1817), 1733 states have call predecessors, (1817), 1817 states have call successors, (1817) [2022-03-19 10:41:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 9496 transitions. [2022-03-19 10:41:58,039 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 9496 transitions. Word has length 144 [2022-03-19 10:41:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:41:58,039 INFO L478 AbstractCegarLoop]: Abstraction has 7078 states and 9496 transitions. [2022-03-19 10:41:58,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 10:41:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 9496 transitions. [2022-03-19 10:41:58,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 10:41:58,042 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:41:58,042 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 10:41:58,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-19 10:41:58,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-19 10:41:58,251 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:41:58,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:41:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1774625240, now seen corresponding path program 35 times [2022-03-19 10:41:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:41:58,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1346448272] [2022-03-19 10:41:58,252 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:41:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1774625240, now seen corresponding path program 36 times [2022-03-19 10:41:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:41:58,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233919204] [2022-03-19 10:41:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:41:58,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:41:58,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:41:58,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028438029] [2022-03-19 10:41:58,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:41:58,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:41:58,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:41:58,259 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:41:58,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-19 10:41:58,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 10:41:58,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:41:58,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-19 10:41:58,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:15,652 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 46 proven. 142 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-19 10:42:15,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:21,716 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:21,889 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:22,602 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:22,738 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:22,881 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:23,025 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:23,252 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:23,756 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:23,930 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:24,090 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:24,256 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:24,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:24,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233919204] [2022-03-19 10:42:24,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:24,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028438029] [2022-03-19 10:42:24,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028438029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:42:24,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:42:24,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-19 10:42:24,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:24,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1346448272] [2022-03-19 10:42:24,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1346448272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:24,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:24,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 10:42:24,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816610228] [2022-03-19 10:42:24,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:24,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 10:42:24,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:24,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 10:42:24,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1270, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 10:42:24,397 INFO L87 Difference]: Start difference. First operand 7078 states and 9496 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:42:27,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:27,116 INFO L93 Difference]: Finished difference Result 7138 states and 9564 transitions. [2022-03-19 10:42:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 10:42:27,117 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 149 [2022-03-19 10:42:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:27,129 INFO L225 Difference]: With dead ends: 7138 [2022-03-19 10:42:27,130 INFO L226 Difference]: Without dead ends: 7131 [2022-03-19 10:42:27,131 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 10:42:27,131 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 78 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:27,131 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1253 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 436 Invalid, 0 Unknown, 353 Unchecked, 0.3s Time] [2022-03-19 10:42:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7131 states. [2022-03-19 10:42:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7131 to 7088. [2022-03-19 10:42:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7088 states, 4793 states have (on average 1.2230335906530356) internal successors, (5862), 4879 states have internal predecessors, (5862), 1827 states have call successors, (1827), 473 states have call predecessors, (1827), 467 states have return successors, (1818), 1735 states have call predecessors, (1818), 1818 states have call successors, (1818) [2022-03-19 10:42:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7088 states to 7088 states and 9507 transitions. [2022-03-19 10:42:29,121 INFO L78 Accepts]: Start accepts. Automaton has 7088 states and 9507 transitions. Word has length 149 [2022-03-19 10:42:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:29,121 INFO L478 AbstractCegarLoop]: Abstraction has 7088 states and 9507 transitions. [2022-03-19 10:42:29,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:42:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 7088 states and 9507 transitions. [2022-03-19 10:42:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 10:42:29,123 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:29,124 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 10:42:29,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-19 10:42:29,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-19 10:42:29,324 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:29,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:29,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1181195580, now seen corresponding path program 37 times [2022-03-19 10:42:29,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:29,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [486768970] [2022-03-19 10:42:29,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:29,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1181195580, now seen corresponding path program 38 times [2022-03-19 10:42:29,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:29,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689876467] [2022-03-19 10:42:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:29,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:29,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:29,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206592495] [2022-03-19 10:42:29,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:42:29,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:29,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:29,331 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:29,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-19 10:42:29,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:42:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:29,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-19 10:42:29,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 97 proven. 190 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-19 10:42:30,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:42:32,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:42:32,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689876467] [2022-03-19 10:42:32,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:42:32,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206592495] [2022-03-19 10:42:32,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206592495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:42:32,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:42:32,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-19 10:42:32,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:42:32,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [486768970] [2022-03-19 10:42:32,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [486768970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:42:32,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:42:32,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 10:42:32,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305968662] [2022-03-19 10:42:32,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:42:32,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 10:42:32,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:32,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 10:42:32,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-19 10:42:32,613 INFO L87 Difference]: Start difference. First operand 7088 states and 9507 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:42:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:42:39,784 INFO L93 Difference]: Finished difference Result 7277 states and 9749 transitions. [2022-03-19 10:42:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 10:42:39,785 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 149 [2022-03-19 10:42:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:42:39,797 INFO L225 Difference]: With dead ends: 7277 [2022-03-19 10:42:39,798 INFO L226 Difference]: Without dead ends: 7274 [2022-03-19 10:42:39,799 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 10:42:39,799 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 130 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:42:39,799 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1484 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-19 10:42:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2022-03-19 10:42:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 7136. [2022-03-19 10:42:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 4825 states have (on average 1.2219689119170984) internal successors, (5896), 4911 states have internal predecessors, (5896), 1836 states have call successors, (1836), 480 states have call predecessors, (1836), 474 states have return successors, (1827), 1744 states have call predecessors, (1827), 1827 states have call successors, (1827) [2022-03-19 10:42:41,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 9559 transitions. [2022-03-19 10:42:41,802 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 9559 transitions. Word has length 149 [2022-03-19 10:42:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:42:41,802 INFO L478 AbstractCegarLoop]: Abstraction has 7136 states and 9559 transitions. [2022-03-19 10:42:41,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 10:42:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 9559 transitions. [2022-03-19 10:42:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-19 10:42:41,805 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:42:41,805 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1] [2022-03-19 10:42:41,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-19 10:42:42,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:42,005 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:42:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:42:42,006 INFO L85 PathProgramCache]: Analyzing trace with hash 205680083, now seen corresponding path program 39 times [2022-03-19 10:42:42,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:42:42,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [259519235] [2022-03-19 10:42:42,006 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:42:42,006 INFO L85 PathProgramCache]: Analyzing trace with hash 205680083, now seen corresponding path program 40 times [2022-03-19 10:42:42,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:42:42,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000760609] [2022-03-19 10:42:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:42:42,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:42:42,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:42:42,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095880857] [2022-03-19 10:42:42,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:42:42,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:42:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:42:42,012 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:42:42,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-19 10:42:42,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:42:42,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:42:42,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-19 10:42:42,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:42:45,245 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:45,602 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:53,899 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:53,904 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:42:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 210 proven. 108 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2022-03-19 10:42:56,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:43:13,657 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:44:14,312 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:44:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 210 proven. 105 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2022-03-19 10:44:18,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:44:18,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000760609] [2022-03-19 10:44:18,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:44:18,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095880857] [2022-03-19 10:44:18,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095880857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:44:18,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:44:18,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2022-03-19 10:44:18,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:44:18,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [259519235] [2022-03-19 10:44:18,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [259519235] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:44:18,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:44:18,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 10:44:18,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207723515] [2022-03-19 10:44:18,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:44:18,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 10:44:18,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:44:18,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 10:44:18,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 10:44:18,827 INFO L87 Difference]: Start difference. First operand 7136 states and 9559 transitions. Second operand has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 10:44:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:44:24,863 INFO L93 Difference]: Finished difference Result 7156 states and 9579 transitions. [2022-03-19 10:44:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 10:44:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) Word has length 154 [2022-03-19 10:44:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:44:24,876 INFO L225 Difference]: With dead ends: 7156 [2022-03-19 10:44:24,877 INFO L226 Difference]: Without dead ends: 7149 [2022-03-19 10:44:24,878 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 265 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=403, Invalid=1853, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 10:44:24,878 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 91 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 10:44:24,878 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 623 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 741 Invalid, 0 Unknown, 356 Unchecked, 0.9s Time] [2022-03-19 10:44:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7149 states. [2022-03-19 10:44:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7149 to 7140. [2022-03-19 10:44:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 4829 states have (on average 1.2217850486643198) internal successors, (5900), 4915 states have internal predecessors, (5900), 1836 states have call successors, (1836), 480 states have call predecessors, (1836), 474 states have return successors, (1827), 1744 states have call predecessors, (1827), 1827 states have call successors, (1827) [2022-03-19 10:44:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 9563 transitions. [2022-03-19 10:44:26,978 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 9563 transitions. Word has length 154 [2022-03-19 10:44:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:44:26,978 INFO L478 AbstractCegarLoop]: Abstraction has 7140 states and 9563 transitions. [2022-03-19 10:44:26,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-19 10:44:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 9563 transitions. [2022-03-19 10:44:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-19 10:44:26,982 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:44:26,982 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1] [2022-03-19 10:44:26,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-19 10:44:27,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:44:27,182 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:44:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:44:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash 215045455, now seen corresponding path program 41 times [2022-03-19 10:44:27,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:44:27,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1692391859] [2022-03-19 10:44:27,183 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:44:27,183 INFO L85 PathProgramCache]: Analyzing trace with hash 215045455, now seen corresponding path program 42 times [2022-03-19 10:44:27,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:44:27,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557158621] [2022-03-19 10:44:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:44:27,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:44:27,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:44:27,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484802382] [2022-03-19 10:44:27,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:44:27,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:44:27,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:44:27,189 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:44:27,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-19 10:44:27,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 10:44:27,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:44:27,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 10:44:27,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:44:51,096 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:44:51,100 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:45:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 99 proven. 170 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-03-19 10:45:06,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:45:12,993 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:45:48,961 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_main_~p~0 c_main_~x~0)) (.cse3 (* c_main_~r~0 c_main_~y~0)) (.cse0 (* (- 1) c_main_~b~0)) (.cse1 (* (- 1) c_main_~b~0 c_main_~k~0)) (.cse4 (* c_main_~q~0 c_main_~x~0)) (.cse5 (* c_main_~s~0 c_main_~y~0))) (or (not (= (mod (div (+ .cse0 (* (* c_main_~b~0 c_main_~k~0) (- 1)) c_main_~a~0) 2) c_main_~b~0) 0)) (not (= (mod (+ c_main_~b~0 c_main_~a~0 .cse1) 2) 0)) (not (= (+ .cse2 .cse3) c_main_~a~0)) (<= (* (div (+ .cse0 c_main_~c~0) 2) 4) c_main_~c~0) (not (= (mod (+ c_main_~b~0 c_main_~c~0) 2) 0)) (= (+ c_main_~b~0 .cse2 .cse3) (let ((.cse6 (div (div (+ .cse0 c_main_~a~0 .cse1) 2) c_main_~b~0))) (+ (* .cse4 2) (* 2 .cse5) (* 2 (* c_main_~q~0 .cse6 c_main_~x~0)) (* c_main_~q~0 c_main_~x~0 c_main_~k~0) (* (* .cse6 c_main_~s~0 c_main_~y~0) 2) (* c_main_~s~0 c_main_~y~0 c_main_~k~0)))) (not (= c_main_~b~0 (+ .cse4 .cse5))) (<= c_main_~b~0 0))) is different from true [2022-03-19 10:46:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 100 proven. 155 refuted. 0 times theorem prover too weak. 624 trivial. 8 not checked. [2022-03-19 10:46:21,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:46:21,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557158621] [2022-03-19 10:46:21,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:46:21,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484802382] [2022-03-19 10:46:21,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484802382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:46:21,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:46:21,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-03-19 10:46:21,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:46:21,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1692391859] [2022-03-19 10:46:21,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1692391859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:46:21,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:46:21,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:46:21,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295327541] [2022-03-19 10:46:21,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:46:21,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:46:21,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:46:21,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:46:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=712, Unknown=3, NotChecked=56, Total=930 [2022-03-19 10:46:21,216 INFO L87 Difference]: Start difference. First operand 7140 states and 9563 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:46:23,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:46:35,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:46:39,140 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:46:40,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:46:47,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 10:46:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:46:47,804 INFO L93 Difference]: Finished difference Result 7769 states and 10409 transitions. [2022-03-19 10:46:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:46:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 154 [2022-03-19 10:46:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:46:47,826 INFO L225 Difference]: With dead ends: 7769 [2022-03-19 10:46:47,826 INFO L226 Difference]: Without dead ends: 7751 [2022-03-19 10:46:47,830 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=228, Invalid=1033, Unknown=3, NotChecked=68, Total=1332 [2022-03-19 10:46:47,830 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 69 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 51 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:46:47,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 694 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 636 Invalid, 3 Unknown, 0 Unchecked, 13.2s Time] [2022-03-19 10:46:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2022-03-19 10:46:50,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 7511. [2022-03-19 10:46:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7511 states, 5089 states have (on average 1.218707015130674) internal successors, (6202), 5174 states have internal predecessors, (6202), 1918 states have call successors, (1918), 509 states have call predecessors, (1918), 503 states have return successors, (1910), 1827 states have call predecessors, (1910), 1910 states have call successors, (1910) [2022-03-19 10:46:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7511 states to 7511 states and 10030 transitions. [2022-03-19 10:46:50,188 INFO L78 Accepts]: Start accepts. Automaton has 7511 states and 10030 transitions. Word has length 154 [2022-03-19 10:46:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:46:50,189 INFO L478 AbstractCegarLoop]: Abstraction has 7511 states and 10030 transitions. [2022-03-19 10:46:50,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 10:46:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 7511 states and 10030 transitions. [2022-03-19 10:46:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 10:46:50,192 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:46:50,192 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2022-03-19 10:46:50,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-19 10:46:50,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:46:50,393 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:46:50,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:46:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash 40584978, now seen corresponding path program 3 times [2022-03-19 10:46:50,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:46:50,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1593796252] [2022-03-19 10:46:50,393 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:46:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash 40584978, now seen corresponding path program 4 times [2022-03-19 10:46:50,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:46:50,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244853993] [2022-03-19 10:46:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:46:50,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:46:50,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:46:50,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460236508] [2022-03-19 10:46:50,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:46:50,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:46:50,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:46:50,399 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:46:50,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-19 10:46:50,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:46:50,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:46:50,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 10:46:50,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:46:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 93 proven. 20 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-03-19 10:46:50,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:46:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 93 proven. 20 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-03-19 10:46:51,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:46:51,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244853993] [2022-03-19 10:46:51,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:46:51,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460236508] [2022-03-19 10:46:51,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460236508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:46:51,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:46:51,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-19 10:46:51,409 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:46:51,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1593796252] [2022-03-19 10:46:51,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1593796252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:46:51,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:46:51,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:46:51,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956628929] [2022-03-19 10:46:51,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:46:51,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:46:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:46:51,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:46:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:46:51,410 INFO L87 Difference]: Start difference. First operand 7511 states and 10030 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-19 10:46:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:46:54,136 INFO L93 Difference]: Finished difference Result 7755 states and 10320 transitions. [2022-03-19 10:46:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:46:54,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 153 [2022-03-19 10:46:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:46:54,154 INFO L225 Difference]: With dead ends: 7755 [2022-03-19 10:46:54,154 INFO L226 Difference]: Without dead ends: 7753 [2022-03-19 10:46:54,156 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:46:54,157 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 34 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:46:54,157 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 296 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:46:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2022-03-19 10:46:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 7649. [2022-03-19 10:46:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7649 states, 5191 states have (on average 1.2194182238489695) internal successors, (6330), 5285 states have internal predecessors, (6330), 1940 states have call successors, (1940), 523 states have call predecessors, (1940), 517 states have return successors, (1932), 1840 states have call predecessors, (1932), 1932 states have call successors, (1932) [2022-03-19 10:46:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7649 states to 7649 states and 10202 transitions. [2022-03-19 10:46:56,581 INFO L78 Accepts]: Start accepts. Automaton has 7649 states and 10202 transitions. Word has length 153 [2022-03-19 10:46:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:46:56,582 INFO L478 AbstractCegarLoop]: Abstraction has 7649 states and 10202 transitions. [2022-03-19 10:46:56,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-19 10:46:56,582 INFO L276 IsEmpty]: Start isEmpty. Operand 7649 states and 10202 transitions. [2022-03-19 10:46:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-19 10:46:56,603 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:46:56,603 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2022-03-19 10:46:56,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-19 10:46:56,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-19 10:46:56,803 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:46:56,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:46:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash 808456558, now seen corresponding path program 43 times [2022-03-19 10:46:56,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:46:56,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [697372517] [2022-03-19 10:46:56,804 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:46:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash 808456558, now seen corresponding path program 44 times [2022-03-19 10:46:56,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:46:56,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936007155] [2022-03-19 10:46:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:46:56,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:46:56,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:46:56,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845797367] [2022-03-19 10:46:56,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:46:56,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:46:56,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:46:56,810 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:46:56,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-19 10:46:56,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:46:56,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:46:56,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-19 10:46:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates...