/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 14:21:38,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 14:21:38,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 14:21:38,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 14:21:38,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 14:21:38,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 14:21:38,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 14:21:38,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 14:21:38,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 14:21:38,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 14:21:38,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 14:21:38,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 14:21:38,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 14:21:38,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 14:21:38,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 14:21:38,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 14:21:38,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 14:21:38,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 14:21:38,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 14:21:38,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 14:21:38,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 14:21:38,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 14:21:38,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 14:21:38,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 14:21:38,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 14:21:38,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 14:21:38,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 14:21:38,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 14:21:38,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 14:21:38,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 14:21:38,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 14:21:38,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 14:21:38,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 14:21:38,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 14:21:38,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 14:21:38,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 14:21:38,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 14:21:38,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 14:21:38,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 14:21:38,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 14:21:38,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 14:21:38,428 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 14:21:38,438 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 14:21:38,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 14:21:38,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 14:21:38,439 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 14:21:38,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 14:21:38,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 14:21:38,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 14:21:38,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 14:21:38,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 14:21:38,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 14:21:38,440 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 14:21:38,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 14:21:38,440 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 14:21:38,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 14:21:38,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 14:21:38,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 14:21:38,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 14:21:38,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 14:21:38,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:21:38,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 14:21:38,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 14:21:38,442 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 14:21:38,442 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 14:21:38,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 14:21:38,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 14:21:38,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 14:21:38,633 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 14:21:38,634 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 14:21:38,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-01-31 14:21:38,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/948936f75/43b7a42ce98b46e8823946fa84198f6d/FLAG41f04de00 [2022-01-31 14:21:39,017 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 14:21:39,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-01-31 14:21:39,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/948936f75/43b7a42ce98b46e8823946fa84198f6d/FLAG41f04de00 [2022-01-31 14:21:39,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/948936f75/43b7a42ce98b46e8823946fa84198f6d [2022-01-31 14:21:39,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 14:21:39,432 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 14:21:39,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 14:21:39,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 14:21:39,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 14:21:39,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:21:39" (1/1) ... [2022-01-31 14:21:39,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c41ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:21:39, skipping insertion in model container [2022-01-31 14:21:39,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:21:39" (1/1) ... [2022-01-31 14:21:39,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 14:21:39,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 14:21:39,555 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/egcd2-ll_unwindbound100.c[490,503] [2022-01-31 14:21:39,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:21:39,604 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 14:21:39,614 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/egcd2-ll_unwindbound100.c[490,503] [2022-01-31 14:21:39,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:21:39,645 INFO L208 MainTranslator]: Completed translation [2022-01-31 14:21:39,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:21:39 WrapperNode [2022-01-31 14:21:39,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 14:21:39,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 14:21:39,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 14:21:39,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 14:21:39,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:21:39" (1/1) ... [2022-01-31 14:21:39,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:21:39" (1/1) ... [2022-01-31 14:21:39,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:21:39" (1/1) ... [2022-01-31 14:21:39,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:21:39" (1/1) ... [2022-01-31 14:21:39,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:21:39" (1/1) ... [2022-01-31 14:21:39,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:21:39" (1/1) ... [2022-01-31 14:21:39,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:21:39" (1/1) ... [2022-01-31 14:21:39,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 14:21:39,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 14:21:39,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 14:21:39,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 14:21:39,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:21:39" (1/1) ... [2022-01-31 14:21:39,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:21:39,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:39,712 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) [2022-01-31 14:21:39,730 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 [2022-01-31 14:21:39,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 14:21:39,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 14:21:39,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 14:21:39,740 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 14:21:39,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 14:21:39,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 14:21:39,741 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 14:21:39,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 14:21:39,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 14:21:39,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 14:21:39,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 14:21:39,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 14:21:39,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 14:21:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 14:21:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 14:21:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 14:21:39,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 14:21:39,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 14:21:39,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 14:21:39,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 14:21:39,815 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 14:21:39,816 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 14:21:39,966 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 14:21:39,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 14:21:39,970 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 14:21:39,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:21:39 BoogieIcfgContainer [2022-01-31 14:21:39,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 14:21:39,972 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 14:21:39,972 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 14:21:39,973 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 14:21:39,975 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:21:39" (1/1) ... [2022-01-31 14:21:39,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:21:39 BasicIcfg [2022-01-31 14:21:39,987 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 14:21:39,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 14:21:39,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 14:21:39,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 14:21:39,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:21:39" (1/4) ... [2022-01-31 14:21:39,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76979720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:21:39, skipping insertion in model container [2022-01-31 14:21:39,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:21:39" (2/4) ... [2022-01-31 14:21:39,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76979720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:21:39, skipping insertion in model container [2022-01-31 14:21:39,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:21:39" (3/4) ... [2022-01-31 14:21:39,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76979720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 02:21:39, skipping insertion in model container [2022-01-31 14:21:39,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:21:39" (4/4) ... [2022-01-31 14:21:39,995 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.cJordan [2022-01-31 14:21:39,999 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 14:21:39,999 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 14:21:40,031 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 14:21:40,036 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 14:21:40,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 14:21:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 14:21:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 14:21:40,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:40,054 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:21:40,054 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:40,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:40,058 INFO L85 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2022-01-31 14:21:40,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:40,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240747088] [2022-01-31 14:21:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:40,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:40,157 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:40,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036798596] [2022-01-31 14:21:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:40,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:40,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:40,160 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) [2022-01-31 14:21:40,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 14:21:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-31 14:21:40,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 14:21:40,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:21:40,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:40,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240747088] [2022-01-31 14:21:40,325 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036798596] [2022-01-31 14:21:40,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036798596] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:21:40,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:21:40,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-31 14:21:40,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195441295] [2022-01-31 14:21:40,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:21:40,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-31 14:21:40,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-31 14:21:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 14:21:40,356 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 14:21:40,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:40,371 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-01-31 14:21:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-31 14:21:40,372 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2022-01-31 14:21:40,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:40,378 INFO L225 Difference]: With dead ends: 39 [2022-01-31 14:21:40,379 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 14:21:40,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 14:21:40,384 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:40,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:21:40,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 14:21:40,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 14:21:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:21:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-01-31 14:21:40,419 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-01-31 14:21:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:40,420 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-01-31 14:21:40,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 14:21:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-01-31 14:21:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 14:21:40,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:40,422 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:21:40,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:40,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-31 14:21:40,643 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:40,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:40,644 INFO L85 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2022-01-31 14:21:40,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:40,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328689676] [2022-01-31 14:21:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:40,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:40,660 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:40,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573719298] [2022-01-31 14:21:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:40,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:40,662 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) [2022-01-31 14:21:40,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 14:21:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:40,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 14:21:40,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 14:21:40,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:21:40,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328689676] [2022-01-31 14:21:40,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573719298] [2022-01-31 14:21:40,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573719298] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:21:40,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:21:40,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 14:21:40,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382216799] [2022-01-31 14:21:40,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:21:40,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 14:21:40,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:40,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 14:21:40,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 14:21:40,820 INFO L87 Difference]: Start difference. First operand 34 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:21:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:40,831 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-01-31 14:21:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 14:21:40,832 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-01-31 14:21:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:40,833 INFO L225 Difference]: With dead ends: 36 [2022-01-31 14:21:40,833 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 14:21:40,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 14:21:40,834 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:40,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:21:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 14:21:40,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 14:21:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:21:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-01-31 14:21:40,839 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-01-31 14:21:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:40,839 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-01-31 14:21:40,839 INFO L471 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:21:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-01-31 14:21:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 14:21:40,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:40,840 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:21:40,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:41,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-31 14:21:41,057 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:41,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2022-01-31 14:21:41,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:41,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724499522] [2022-01-31 14:21:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:41,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:41,069 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:41,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625984820] [2022-01-31 14:21:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:41,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:41,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:41,071 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) [2022-01-31 14:21:41,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 14:21:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:41,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:21:41,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 14:21:41,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 14:21:41,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:41,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724499522] [2022-01-31 14:21:41,352 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:41,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625984820] [2022-01-31 14:21:41,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625984820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:21:41,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:21:41,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-01-31 14:21:41,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932388479] [2022-01-31 14:21:41,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:21:41,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 14:21:41,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:41,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 14:21:41,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 14:21:41,357 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 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) [2022-01-31 14:21:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:41,424 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2022-01-31 14:21:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:21:41,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 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 34 [2022-01-31 14:21:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:41,428 INFO L225 Difference]: With dead ends: 45 [2022-01-31 14:21:41,428 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 14:21:41,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:21:41,431 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:41,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 127 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:21:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 14:21:41,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-01-31 14:21:41,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:21:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-01-31 14:21:41,453 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-01-31 14:21:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:41,453 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-01-31 14:21:41,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 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) [2022-01-31 14:21:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-01-31 14:21:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 14:21:41,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:41,455 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:21:41,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 14:21:41,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:41,655 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2022-01-31 14:21:41,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944172409] [2022-01-31 14:21:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:41,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:41,672 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:41,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267430511] [2022-01-31 14:21:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:41,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:41,688 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) [2022-01-31 14:21:41,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 14:21:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:41,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 14:21:41,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 14:21:41,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 14:21:41,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944172409] [2022-01-31 14:21:41,971 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267430511] [2022-01-31 14:21:41,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267430511] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:21:41,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:21:41,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-01-31 14:21:41,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475295235] [2022-01-31 14:21:41,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:21:41,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:21:41,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:41,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:21:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:21:41,975 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 14:21:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:42,007 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-01-31 14:21:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:21:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2022-01-31 14:21:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:42,008 INFO L225 Difference]: With dead ends: 41 [2022-01-31 14:21:42,008 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 14:21:42,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:21:42,009 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:42,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:21:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 14:21:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-31 14:21:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:21:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-01-31 14:21:42,013 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 36 [2022-01-31 14:21:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:42,013 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-01-31 14:21:42,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 14:21:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-01-31 14:21:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 14:21:42,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:42,014 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:21:42,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:42,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:42,231 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2022-01-31 14:21:42,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:42,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542827187] [2022-01-31 14:21:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:42,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:42,251 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:42,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336142517] [2022-01-31 14:21:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:42,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:42,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:42,253 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) [2022-01-31 14:21:42,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 14:21:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:42,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:21:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 14:21:42,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:21:42,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:42,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542827187] [2022-01-31 14:21:42,375 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:42,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336142517] [2022-01-31 14:21:42,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336142517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:21:42,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:21:42,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:21:42,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48801792] [2022-01-31 14:21:42,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:21:42,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:21:42,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:21:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:21:42,377 INFO L87 Difference]: Start difference. First operand 41 states and 51 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:21:42,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:42,397 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-01-31 14:21:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:21:42,398 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-01-31 14:21:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:42,399 INFO L225 Difference]: With dead ends: 43 [2022-01-31 14:21:42,399 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 14:21:42,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:21:42,399 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:42,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:21:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 14:21:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-31 14:21:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:21:42,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-01-31 14:21:42,403 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2022-01-31 14:21:42,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:42,403 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-01-31 14:21:42,403 INFO L471 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:21:42,403 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-01-31 14:21:42,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 14:21:42,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:42,404 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:21:42,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:42,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:42,613 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:42,614 INFO L85 PathProgramCache]: Analyzing trace with hash 578094295, now seen corresponding path program 1 times [2022-01-31 14:21:42,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:42,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278797295] [2022-01-31 14:21:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:42,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:42,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:42,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289679763] [2022-01-31 14:21:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:42,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:42,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:42,623 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) [2022-01-31 14:21:42,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 14:21:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:42,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 14:21:42,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 14:21:42,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 14:21:42,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:42,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278797295] [2022-01-31 14:21:42,901 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:42,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289679763] [2022-01-31 14:21:42,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289679763] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:21:42,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:21:42,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-01-31 14:21:42,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538944356] [2022-01-31 14:21:42,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:21:42,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:21:42,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:42,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:21:42,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:21:42,903 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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) [2022-01-31 14:21:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:42,928 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-01-31 14:21:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:21:42,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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 41 [2022-01-31 14:21:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:42,930 INFO L225 Difference]: With dead ends: 55 [2022-01-31 14:21:42,930 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 14:21:42,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:21:42,930 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:42,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 169 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:21:42,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 14:21:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-01-31 14:21:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 14:21:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-01-31 14:21:42,935 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 41 [2022-01-31 14:21:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:42,935 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-01-31 14:21:42,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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) [2022-01-31 14:21:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-01-31 14:21:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 14:21:42,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:42,936 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-01-31 14:21:42,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:43,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:43,152 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1581112078, now seen corresponding path program 1 times [2022-01-31 14:21:43,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:43,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027394712] [2022-01-31 14:21:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:43,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:43,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:43,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060947596] [2022-01-31 14:21:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:43,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:43,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:43,161 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) [2022-01-31 14:21:43,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 14:21:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:43,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 14:21:43,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-31 14:21:43,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 14:21:43,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:43,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027394712] [2022-01-31 14:21:43,433 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:43,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060947596] [2022-01-31 14:21:43,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060947596] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:21:43,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:21:43,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-01-31 14:21:43,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386032485] [2022-01-31 14:21:43,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:21:43,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:21:43,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:43,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:21:43,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:21:43,434 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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) [2022-01-31 14:21:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:43,464 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-01-31 14:21:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:21:43,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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 46 [2022-01-31 14:21:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:43,465 INFO L225 Difference]: With dead ends: 59 [2022-01-31 14:21:43,465 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 14:21:43,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:21:43,466 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:43,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:21:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 14:21:43,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-31 14:21:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 14:21:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-01-31 14:21:43,470 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 46 [2022-01-31 14:21:43,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:43,470 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-01-31 14:21:43,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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) [2022-01-31 14:21:43,470 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-01-31 14:21:43,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 14:21:43,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:43,471 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:21:43,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:43,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:43,694 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:43,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1942645143, now seen corresponding path program 1 times [2022-01-31 14:21:43,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:43,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052169353] [2022-01-31 14:21:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:43,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:43,711 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:43,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979107173] [2022-01-31 14:21:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:43,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:43,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:43,713 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) [2022-01-31 14:21:43,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 14:21:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:43,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 14:21:43,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 14:21:43,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:44,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:44,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052169353] [2022-01-31 14:21:44,059 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:44,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979107173] [2022-01-31 14:21:44,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979107173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:21:44,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:21:44,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-01-31 14:21:44,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296544238] [2022-01-31 14:21:44,060 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:21:44,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:21:44,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:44,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:21:44,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:21:44,061 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 14:21:44,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:44,174 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-01-31 14:21:44,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 14:21:44,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-01-31 14:21:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:44,175 INFO L225 Difference]: With dead ends: 63 [2022-01-31 14:21:44,175 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 14:21:44,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-31 14:21:44,176 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:44,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 190 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:21:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 14:21:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-01-31 14:21:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 14:21:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-01-31 14:21:44,180 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 51 [2022-01-31 14:21:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:44,180 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-01-31 14:21:44,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 14:21:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-01-31 14:21:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 14:21:44,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:44,181 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:21:44,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:44,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-31 14:21:44,395 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:44,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1573186588, now seen corresponding path program 1 times [2022-01-31 14:21:44,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:44,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48181049] [2022-01-31 14:21:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:44,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:44,403 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:44,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343736262] [2022-01-31 14:21:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:44,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:44,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:44,404 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) [2022-01-31 14:21:44,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 14:21:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:44,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:21:44,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 14:21:44,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 14:21:44,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:44,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48181049] [2022-01-31 14:21:44,652 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:44,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343736262] [2022-01-31 14:21:44,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343736262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:21:44,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:21:44,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-31 14:21:44,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442873566] [2022-01-31 14:21:44,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:21:44,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:21:44,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:44,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:21:44,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:21:44,653 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 14:21:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:44,797 INFO L93 Difference]: Finished difference Result 207 states and 242 transitions. [2022-01-31 14:21:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 14:21:44,798 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 60 [2022-01-31 14:21:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:44,799 INFO L225 Difference]: With dead ends: 207 [2022-01-31 14:21:44,799 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 14:21:44,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:21:44,800 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 119 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:44,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 264 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:21:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 14:21:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 199. [2022-01-31 14:21:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 130 states have internal predecessors, (150), 46 states have call successors, (46), 27 states have call predecessors, (46), 26 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 14:21:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 237 transitions. [2022-01-31 14:21:44,810 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 237 transitions. Word has length 60 [2022-01-31 14:21:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:44,810 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 237 transitions. [2022-01-31 14:21:44,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 14:21:44,810 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 237 transitions. [2022-01-31 14:21:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 14:21:44,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:44,815 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-01-31 14:21:44,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:45,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:45,027 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:45,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:45,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1491020248, now seen corresponding path program 1 times [2022-01-31 14:21:45,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:45,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798735010] [2022-01-31 14:21:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:45,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:45,035 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:45,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166950579] [2022-01-31 14:21:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:45,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:45,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:45,038 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) [2022-01-31 14:21:45,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 14:21:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:45,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:21:45,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-31 14:21:45,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-31 14:21:45,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:45,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798735010] [2022-01-31 14:21:45,259 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:45,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166950579] [2022-01-31 14:21:45,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166950579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:21:45,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:21:45,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-01-31 14:21:45,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783126587] [2022-01-31 14:21:45,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:21:45,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 14:21:45,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:45,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 14:21:45,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:21:45,262 INFO L87 Difference]: Start difference. First operand 199 states and 237 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-31 14:21:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:45,381 INFO L93 Difference]: Finished difference Result 263 states and 342 transitions. [2022-01-31 14:21:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:21:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-01-31 14:21:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:45,385 INFO L225 Difference]: With dead ends: 263 [2022-01-31 14:21:45,385 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 14:21:45,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-31 14:21:45,386 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 62 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:45,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 387 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:21:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 14:21:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 239. [2022-01-31 14:21:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.2222222222222223) internal successors, (187), 156 states have internal predecessors, (187), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-01-31 14:21:45,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 303 transitions. [2022-01-31 14:21:45,412 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 303 transitions. Word has length 61 [2022-01-31 14:21:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:45,412 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 303 transitions. [2022-01-31 14:21:45,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-31 14:21:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 303 transitions. [2022-01-31 14:21:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 14:21:45,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:45,416 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-01-31 14:21:45,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:45,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 14:21:45,620 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:45,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:45,621 INFO L85 PathProgramCache]: Analyzing trace with hash 317217743, now seen corresponding path program 1 times [2022-01-31 14:21:45,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:45,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820352460] [2022-01-31 14:21:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:45,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:45,628 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:45,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928282845] [2022-01-31 14:21:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:45,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:45,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:45,629 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) [2022-01-31 14:21:45,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 14:21:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:45,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:21:45,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 14:21:45,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-31 14:21:45,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:45,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820352460] [2022-01-31 14:21:45,854 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:45,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928282845] [2022-01-31 14:21:45,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928282845] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:21:45,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:21:45,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-31 14:21:45,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491703783] [2022-01-31 14:21:45,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:21:45,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:21:45,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:21:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:21:45,856 INFO L87 Difference]: Start difference. First operand 239 states and 303 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 14:21:45,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:45,975 INFO L93 Difference]: Finished difference Result 252 states and 308 transitions. [2022-01-31 14:21:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 14:21:45,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 63 [2022-01-31 14:21:45,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:45,977 INFO L225 Difference]: With dead ends: 252 [2022-01-31 14:21:45,977 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 14:21:45,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:21:45,978 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 83 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:45,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 266 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:21:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 14:21:45,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2022-01-31 14:21:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 165 states have internal predecessors, (190), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-01-31 14:21:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 306 transitions. [2022-01-31 14:21:45,990 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 306 transitions. Word has length 63 [2022-01-31 14:21:45,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:45,990 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 306 transitions. [2022-01-31 14:21:45,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 14:21:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 306 transitions. [2022-01-31 14:21:45,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 14:21:45,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:45,992 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2022-01-31 14:21:46,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:46,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 14:21:46,207 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash 918639692, now seen corresponding path program 1 times [2022-01-31 14:21:46,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:46,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372778825] [2022-01-31 14:21:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:46,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:46,215 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:46,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122028469] [2022-01-31 14:21:46,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:46,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:46,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:46,218 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) [2022-01-31 14:21:46,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 14:21:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:46,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 14:21:46,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 14:21:46,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 14:21:46,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:46,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372778825] [2022-01-31 14:21:46,602 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:46,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122028469] [2022-01-31 14:21:46,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122028469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:21:46,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:21:46,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-01-31 14:21:46,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796624673] [2022-01-31 14:21:46,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:21:46,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 14:21:46,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:46,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 14:21:46,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:21:46,603 INFO L87 Difference]: Start difference. First operand 248 states and 306 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-01-31 14:21:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:46,879 INFO L93 Difference]: Finished difference Result 332 states and 429 transitions. [2022-01-31 14:21:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 14:21:46,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 68 [2022-01-31 14:21:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:46,882 INFO L225 Difference]: With dead ends: 332 [2022-01-31 14:21:46,882 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 14:21:46,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-31 14:21:46,883 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 44 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:46,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 395 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 14:21:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 14:21:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2022-01-31 14:21:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 204 states have internal predecessors, (233), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2022-01-31 14:21:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 370 transitions. [2022-01-31 14:21:46,892 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 370 transitions. Word has length 68 [2022-01-31 14:21:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:46,892 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 370 transitions. [2022-01-31 14:21:46,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-01-31 14:21:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 370 transitions. [2022-01-31 14:21:46,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 14:21:46,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:46,893 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2022-01-31 14:21:46,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:47,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 14:21:47,103 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:47,104 INFO L85 PathProgramCache]: Analyzing trace with hash -210356579, now seen corresponding path program 2 times [2022-01-31 14:21:47,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:47,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048914516] [2022-01-31 14:21:47,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:47,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:47,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:47,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335958322] [2022-01-31 14:21:47,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:21:47,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:47,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:47,112 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) [2022-01-31 14:21:47,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 14:21:47,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:21:47,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:21:47,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 14:21:47,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-31 14:21:47,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-31 14:21:47,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:47,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048914516] [2022-01-31 14:21:47,740 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:47,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335958322] [2022-01-31 14:21:47,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335958322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:21:47,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:21:47,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-01-31 14:21:47,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265804568] [2022-01-31 14:21:47,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:21:47,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 14:21:47,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 14:21:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-31 14:21:47,742 INFO L87 Difference]: Start difference. First operand 295 states and 370 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-01-31 14:21:48,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:48,762 INFO L93 Difference]: Finished difference Result 317 states and 395 transitions. [2022-01-31 14:21:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 14:21:48,763 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 73 [2022-01-31 14:21:48,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:48,765 INFO L225 Difference]: With dead ends: 317 [2022-01-31 14:21:48,765 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 14:21:48,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-31 14:21:48,766 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 51 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:48,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 351 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 14:21:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 14:21:48,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 305. [2022-01-31 14:21:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 204 states have (on average 1.1862745098039216) internal successors, (242), 212 states have internal predecessors, (242), 69 states have call successors, (69), 32 states have call predecessors, (69), 31 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-31 14:21:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 376 transitions. [2022-01-31 14:21:48,778 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 376 transitions. Word has length 73 [2022-01-31 14:21:48,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:48,778 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 376 transitions. [2022-01-31 14:21:48,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-01-31 14:21:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 376 transitions. [2022-01-31 14:21:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 14:21:48,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:48,780 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2022-01-31 14:21:48,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:48,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 14:21:48,992 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:48,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:48,993 INFO L85 PathProgramCache]: Analyzing trace with hash 952478412, now seen corresponding path program 3 times [2022-01-31 14:21:48,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:48,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399869633] [2022-01-31 14:21:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:48,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:49,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:49,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633551122] [2022-01-31 14:21:49,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:21:49,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:49,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:49,003 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) [2022-01-31 14:21:49,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 14:21:49,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 14:21:49,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:21:49,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 14:21:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-31 14:21:49,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:49,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:49,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399869633] [2022-01-31 14:21:49,519 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:49,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633551122] [2022-01-31 14:21:49,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633551122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:21:49,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:21:49,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-31 14:21:49,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273049454] [2022-01-31 14:21:49,519 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:21:49,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 14:21:49,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:49,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 14:21:49,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:21:49,520 INFO L87 Difference]: Start difference. First operand 305 states and 376 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 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) [2022-01-31 14:21:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:49,680 INFO L93 Difference]: Finished difference Result 335 states and 407 transitions. [2022-01-31 14:21:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 14:21:49,681 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 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 78 [2022-01-31 14:21:49,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:49,682 INFO L225 Difference]: With dead ends: 335 [2022-01-31 14:21:49,682 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 14:21:49,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:21:49,683 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 24 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:49,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 249 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:21:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 14:21:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 330. [2022-01-31 14:21:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 221 states have (on average 1.1764705882352942) internal successors, (260), 228 states have internal predecessors, (260), 73 states have call successors, (73), 37 states have call predecessors, (73), 35 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-01-31 14:21:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 402 transitions. [2022-01-31 14:21:49,690 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 402 transitions. Word has length 78 [2022-01-31 14:21:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:49,690 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 402 transitions. [2022-01-31 14:21:49,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 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) [2022-01-31 14:21:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 402 transitions. [2022-01-31 14:21:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 14:21:49,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:49,704 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1] [2022-01-31 14:21:49,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:49,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:49,922 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:49,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:49,922 INFO L85 PathProgramCache]: Analyzing trace with hash 900405455, now seen corresponding path program 1 times [2022-01-31 14:21:49,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:49,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173061382] [2022-01-31 14:21:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:49,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:49,939 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:49,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375442542] [2022-01-31 14:21:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:49,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:49,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:49,944 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) [2022-01-31 14:21:49,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 14:21:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:49,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 14:21:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-01-31 14:21:50,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-01-31 14:21:50,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:50,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173061382] [2022-01-31 14:21:50,950 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:50,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375442542] [2022-01-31 14:21:50,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375442542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:21:50,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:21:50,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-01-31 14:21:50,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897126449] [2022-01-31 14:21:50,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:21:50,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 14:21:50,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:50,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 14:21:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-31 14:21:50,952 INFO L87 Difference]: Start difference. First operand 330 states and 402 transitions. Second operand has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-31 14:21:53,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:53,289 INFO L93 Difference]: Finished difference Result 390 states and 484 transitions. [2022-01-31 14:21:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 14:21:53,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 84 [2022-01-31 14:21:53,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:53,291 INFO L225 Difference]: With dead ends: 390 [2022-01-31 14:21:53,291 INFO L226 Difference]: Without dead ends: 377 [2022-01-31 14:21:53,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 14:21:53,292 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 87 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:53,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 521 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 14:21:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-01-31 14:21:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 368. [2022-01-31 14:21:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 247 states have (on average 1.1902834008097165) internal successors, (294), 252 states have internal predecessors, (294), 84 states have call successors, (84), 37 states have call predecessors, (84), 36 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 14:21:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 460 transitions. [2022-01-31 14:21:53,300 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 460 transitions. Word has length 84 [2022-01-31 14:21:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:53,300 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 460 transitions. [2022-01-31 14:21:53,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-31 14:21:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 460 transitions. [2022-01-31 14:21:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 14:21:53,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:53,301 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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, 1, 1] [2022-01-31 14:21:53,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:53,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 14:21:53,518 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash 653404933, now seen corresponding path program 1 times [2022-01-31 14:21:53,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:53,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182066286] [2022-01-31 14:21:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:53,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:53,525 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:53,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383743591] [2022-01-31 14:21:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:53,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:53,529 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) [2022-01-31 14:21:53,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 14:21:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:53,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 14:21:53,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-01-31 14:21:54,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:54,463 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:21:54,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:54,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182066286] [2022-01-31 14:21:54,882 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:54,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383743591] [2022-01-31 14:21:54,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383743591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:21:54,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:21:54,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-01-31 14:21:54,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402617169] [2022-01-31 14:21:54,883 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:21:54,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 14:21:54,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:54,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 14:21:54,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-31 14:21:54,884 INFO L87 Difference]: Start difference. First operand 368 states and 460 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-31 14:21:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:55,240 INFO L93 Difference]: Finished difference Result 375 states and 465 transitions. [2022-01-31 14:21:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:21:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2022-01-31 14:21:55,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:55,242 INFO L225 Difference]: With dead ends: 375 [2022-01-31 14:21:55,242 INFO L226 Difference]: Without dead ends: 375 [2022-01-31 14:21:55,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-31 14:21:55,243 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 33 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:55,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 361 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 14:21:55,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-01-31 14:21:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 372. [2022-01-31 14:21:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 250 states have (on average 1.184) internal successors, (296), 255 states have internal predecessors, (296), 84 states have call successors, (84), 38 states have call predecessors, (84), 37 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 14:21:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 462 transitions. [2022-01-31 14:21:55,250 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 462 transitions. Word has length 101 [2022-01-31 14:21:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:55,250 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 462 transitions. [2022-01-31 14:21:55,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-31 14:21:55,251 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 462 transitions. [2022-01-31 14:21:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 14:21:55,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:55,251 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:21:55,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:55,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 14:21:55,469 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash 487608439, now seen corresponding path program 4 times [2022-01-31 14:21:55,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:55,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641364323] [2022-01-31 14:21:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:55,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:55,477 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:55,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817765487] [2022-01-31 14:21:55,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 14:21:55,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:55,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:55,479 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) [2022-01-31 14:21:55,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 14:21:55,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 14:21:55,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:21:55,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 14:21:55,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-01-31 14:21:55,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:21:55,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:55,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641364323] [2022-01-31 14:21:55,661 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:55,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817765487] [2022-01-31 14:21:55,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817765487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:21:55,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:21:55,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:21:55,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556164089] [2022-01-31 14:21:55,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:21:55,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:21:55,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:55,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:21:55,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:21:55,662 INFO L87 Difference]: Start difference. First operand 372 states and 462 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-31 14:21:55,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:55,700 INFO L93 Difference]: Finished difference Result 417 states and 535 transitions. [2022-01-31 14:21:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:21:55,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 105 [2022-01-31 14:21:55,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:55,702 INFO L225 Difference]: With dead ends: 417 [2022-01-31 14:21:55,702 INFO L226 Difference]: Without dead ends: 417 [2022-01-31 14:21:55,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 14:21:55,703 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 12 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:55,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 194 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:21:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-01-31 14:21:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 387. [2022-01-31 14:21:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 259 states have (on average 1.193050193050193) internal successors, (309), 263 states have internal predecessors, (309), 90 states have call successors, (90), 38 states have call predecessors, (90), 37 states have return successors, (88), 85 states have call predecessors, (88), 88 states have call successors, (88) [2022-01-31 14:21:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 487 transitions. [2022-01-31 14:21:55,714 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 487 transitions. Word has length 105 [2022-01-31 14:21:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:55,715 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 487 transitions. [2022-01-31 14:21:55,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-01-31 14:21:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 487 transitions. [2022-01-31 14:21:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 14:21:55,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:55,717 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:21:55,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:55,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 14:21:55,931 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash 791718745, now seen corresponding path program 1 times [2022-01-31 14:21:55,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:55,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135211025] [2022-01-31 14:21:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:55,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:55,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:55,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619579863] [2022-01-31 14:21:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:55,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:55,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:55,948 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) [2022-01-31 14:21:55,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 14:21:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:21:56,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 14:21:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:21:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-01-31 14:21:56,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:21:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-01-31 14:21:56,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:21:56,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135211025] [2022-01-31 14:21:56,412 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:21:56,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619579863] [2022-01-31 14:21:56,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619579863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:21:56,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:21:56,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-31 14:21:56,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265770626] [2022-01-31 14:21:56,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:21:56,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 14:21:56,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:21:56,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 14:21:56,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 14:21:56,414 INFO L87 Difference]: Start difference. First operand 387 states and 487 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-01-31 14:21:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:21:56,731 INFO L93 Difference]: Finished difference Result 1260 states and 1555 transitions. [2022-01-31 14:21:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 14:21:56,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) Word has length 116 [2022-01-31 14:21:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:21:56,735 INFO L225 Difference]: With dead ends: 1260 [2022-01-31 14:21:56,735 INFO L226 Difference]: Without dead ends: 1260 [2022-01-31 14:21:56,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2022-01-31 14:21:56,736 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 296 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:21:56,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 458 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 14:21:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-01-31 14:21:56,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1202. [2022-01-31 14:21:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 771 states have (on average 1.1595330739299612) internal successors, (894), 782 states have internal predecessors, (894), 305 states have call successors, (305), 126 states have call predecessors, (305), 125 states have return successors, (296), 293 states have call predecessors, (296), 296 states have call successors, (296) [2022-01-31 14:21:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1495 transitions. [2022-01-31 14:21:56,777 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1495 transitions. Word has length 116 [2022-01-31 14:21:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:21:56,777 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 1495 transitions. [2022-01-31 14:21:56,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 10 states have call successors, (36), 7 states have call predecessors, (36), 6 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-01-31 14:21:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1495 transitions. [2022-01-31 14:21:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 14:21:56,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:21:56,778 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:21:56,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 14:21:56,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 14:21:56,995 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:21:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:21:56,996 INFO L85 PathProgramCache]: Analyzing trace with hash -351372628, now seen corresponding path program 2 times [2022-01-31 14:21:56,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:21:56,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583538589] [2022-01-31 14:21:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:21:56,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:21:57,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:21:57,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775583657] [2022-01-31 14:21:57,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:21:57,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:21:57,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:21:57,004 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) [2022-01-31 14:21:57,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 14:21:57,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:21:57,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:21:57,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-31 14:21:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:22:00,393 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:22:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 139 proven. 92 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-01-31 14:22:02,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:22:03,713 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:22:21,199 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:22:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 136 proven. 86 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-01-31 14:22:36,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:22:36,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583538589] [2022-01-31 14:22:36,052 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:22:36,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775583657] [2022-01-31 14:22:36,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775583657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:22:36,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:22:36,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-01-31 14:22:36,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445179539] [2022-01-31 14:22:36,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:22:36,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 14:22:36,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:22:36,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 14:22:36,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=631, Unknown=11, NotChecked=0, Total=812 [2022-01-31 14:22:36,054 INFO L87 Difference]: Start difference. First operand 1202 states and 1495 transitions. Second operand has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) [2022-01-31 14:22:38,271 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 [] [2022-01-31 14:22:43,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:22:51,440 WARN L228 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 146 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:22:57,874 WARN L228 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:23:03,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:23:05,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:23:07,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:23:14,262 WARN L228 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 80 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:23:25,017 WARN L228 SmtUtils]: Spent 10.27s on a formula simplification. DAG size of input: 109 DAG size of output: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:23:27,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:23:29,953 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:23:37,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:23:49,495 WARN L228 SmtUtils]: Spent 9.74s on a formula simplification. DAG size of input: 129 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:23:54,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:23:56,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:23:58,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:24:03,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:24:05,718 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:24:25,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:24:27,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:24:29,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:24:38,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:24:40,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:24:43,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:24:45,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:24:53,175 WARN L228 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 147 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:24:56,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:25:06,765 WARN L228 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 147 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:25:16,910 WARN L228 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 87 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:26:01,839 WARN L228 SmtUtils]: Spent 42.14s on a formula simplification. DAG size of input: 110 DAG size of output: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:26:03,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:05,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:07,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:15,633 WARN L228 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 146 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:26:17,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:22,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:24,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:26,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:28,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:30,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:32,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:34,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:36,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:38,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:40,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:42,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:44,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:26:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:26:44,196 INFO L93 Difference]: Finished difference Result 1624 states and 2101 transitions. [2022-01-31 14:26:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 14:26:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) Word has length 124 [2022-01-31 14:26:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:26:44,202 INFO L225 Difference]: With dead ends: 1624 [2022-01-31 14:26:44,202 INFO L226 Difference]: Without dead ends: 1624 [2022-01-31 14:26:44,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 192.0s TimeCoverageRelationStatistics Valid=611, Invalid=2024, Unknown=17, NotChecked=0, Total=2652 [2022-01-31 14:26:44,203 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 262 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 352 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:26:44,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 642 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 865 Invalid, 34 Unknown, 0 Unchecked, 87.4s Time] [2022-01-31 14:26:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2022-01-31 14:26:44,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1545. [2022-01-31 14:26:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 972 states have (on average 1.1779835390946503) internal successors, (1145), 988 states have internal predecessors, (1145), 430 states have call successors, (430), 143 states have call predecessors, (430), 142 states have return successors, (421), 413 states have call predecessors, (421), 421 states have call successors, (421) [2022-01-31 14:26:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 1996 transitions. [2022-01-31 14:26:44,233 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 1996 transitions. Word has length 124 [2022-01-31 14:26:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:26:44,233 INFO L470 AbstractCegarLoop]: Abstraction has 1545 states and 1996 transitions. [2022-01-31 14:26:44,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 17 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 16 states have call successors, (38) [2022-01-31 14:26:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 1996 transitions. [2022-01-31 14:26:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 14:26:44,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:26:44,234 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:26:44,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 14:26:44,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:26:44,445 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:26:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:26:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1703433466, now seen corresponding path program 3 times [2022-01-31 14:26:44,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:26:44,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982094607] [2022-01-31 14:26:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:26:44,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:26:44,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:26:44,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240123486] [2022-01-31 14:26:44,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:26:44,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:26:44,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:26:44,454 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) [2022-01-31 14:26:44,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 14:26:44,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 14:26:44,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:26:44,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-31 14:26:44,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:26:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 100 proven. 57 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-01-31 14:26:45,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:27:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-01-31 14:27:16,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:27:16,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982094607] [2022-01-31 14:27:16,219 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:27:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240123486] [2022-01-31 14:27:16,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240123486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:27:16,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:27:16,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-01-31 14:27:16,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661531295] [2022-01-31 14:27:16,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:27:16,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 14:27:16,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:27:16,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 14:27:16,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=356, Unknown=1, NotChecked=0, Total=462 [2022-01-31 14:27:16,220 INFO L87 Difference]: Start difference. First operand 1545 states and 1996 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) [2022-01-31 14:27:32,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:27:38,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:27:40,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:27:42,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:27:44,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:27:50,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:27:52,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:27:55,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:27:57,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:27:59,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:28:01,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:28:04,140 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:28:06,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:28:08,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:28:11,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:28:13,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:28:15,756 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 [] [2022-01-31 14:28:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:28:16,113 INFO L93 Difference]: Finished difference Result 1860 states and 2429 transitions. [2022-01-31 14:28:16,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 14:28:16,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) Word has length 128 [2022-01-31 14:28:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:28:16,120 INFO L225 Difference]: With dead ends: 1860 [2022-01-31 14:28:16,120 INFO L226 Difference]: Without dead ends: 1846 [2022-01-31 14:28:16,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 233 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=327, Invalid=931, Unknown=2, NotChecked=0, Total=1260 [2022-01-31 14:28:16,122 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 173 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 210 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.8s IncrementalHoareTripleChecker+Time [2022-01-31 14:28:16,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 672 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 820 Invalid, 16 Unknown, 0 Unchecked, 40.8s Time] [2022-01-31 14:28:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2022-01-31 14:28:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1756. [2022-01-31 14:28:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1118 states have (on average 1.1914132379248659) internal successors, (1332), 1130 states have internal predecessors, (1332), 482 states have call successors, (482), 157 states have call predecessors, (482), 155 states have return successors, (479), 468 states have call predecessors, (479), 479 states have call successors, (479) [2022-01-31 14:28:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2293 transitions. [2022-01-31 14:28:16,164 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2293 transitions. Word has length 128 [2022-01-31 14:28:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:28:16,165 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 2293 transitions. [2022-01-31 14:28:16,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 12 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 14 states have call predecessors, (37), 11 states have call successors, (37) [2022-01-31 14:28:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2293 transitions. [2022-01-31 14:28:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 14:28:16,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:28:16,166 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:28:16,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 14:28:16,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:28:16,383 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:28:16,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:28:16,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1569660177, now seen corresponding path program 1 times [2022-01-31 14:28:16,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:28:16,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392322357] [2022-01-31 14:28:16,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:28:16,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:28:16,391 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:28:16,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885248359] [2022-01-31 14:28:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:28:16,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:28:16,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:28:16,395 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) [2022-01-31 14:28:16,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 14:28:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:28:16,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 14:28:16,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:28:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-01-31 14:28:16,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:28:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-01-31 14:28:16,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:28:16,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392322357] [2022-01-31 14:28:16,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:28:16,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885248359] [2022-01-31 14:28:16,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885248359] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:28:16,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:28:16,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-31 14:28:16,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985905556] [2022-01-31 14:28:16,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:28:16,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 14:28:16,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:28:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 14:28:16,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-01-31 14:28:16,918 INFO L87 Difference]: Start difference. First operand 1756 states and 2293 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) [2022-01-31 14:28:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:28:17,275 INFO L93 Difference]: Finished difference Result 1809 states and 2308 transitions. [2022-01-31 14:28:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 14:28:17,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) Word has length 133 [2022-01-31 14:28:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:28:17,281 INFO L225 Difference]: With dead ends: 1809 [2022-01-31 14:28:17,281 INFO L226 Difference]: Without dead ends: 1809 [2022-01-31 14:28:17,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-01-31 14:28:17,282 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 276 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:28:17,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 349 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 14:28:17,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-01-31 14:28:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1777. [2022-01-31 14:28:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1139 states have (on average 1.160667251975417) internal successors, (1322), 1151 states have internal predecessors, (1322), 482 states have call successors, (482), 157 states have call predecessors, (482), 155 states have return successors, (479), 468 states have call predecessors, (479), 479 states have call successors, (479) [2022-01-31 14:28:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2283 transitions. [2022-01-31 14:28:17,315 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2283 transitions. Word has length 133 [2022-01-31 14:28:17,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:28:17,315 INFO L470 AbstractCegarLoop]: Abstraction has 1777 states and 2283 transitions. [2022-01-31 14:28:17,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 12 states have call successors, (44), 8 states have call predecessors, (44), 7 states have return successors, (42), 10 states have call predecessors, (42), 11 states have call successors, (42) [2022-01-31 14:28:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2283 transitions. [2022-01-31 14:28:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 14:28:17,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:28:17,317 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:28:17,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 14:28:17,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:28:17,528 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:28:17,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:28:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1381701507, now seen corresponding path program 2 times [2022-01-31 14:28:17,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:28:17,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926885747] [2022-01-31 14:28:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:28:17,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:28:17,534 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:28:17,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839215068] [2022-01-31 14:28:17,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:28:17,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:28:17,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:28:17,537 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) [2022-01-31 14:28:17,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 14:28:17,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:28:17,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:28:17,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 90 conjunts are in the unsatisfiable core [2022-01-31 14:28:17,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:28:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 123 proven. 126 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-01-31 14:28:19,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:28:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-01-31 14:28:21,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:28:21,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926885747] [2022-01-31 14:28:21,048 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:28:21,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839215068] [2022-01-31 14:28:21,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839215068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:28:21,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:28:21,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-01-31 14:28:21,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817685509] [2022-01-31 14:28:21,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:28:21,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 14:28:21,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:28:21,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 14:28:21,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-31 14:28:21,050 INFO L87 Difference]: Start difference. First operand 1777 states and 2283 transitions. Second operand has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-01-31 14:28:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:28:26,023 INFO L93 Difference]: Finished difference Result 1897 states and 2418 transitions. [2022-01-31 14:28:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 14:28:26,024 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 134 [2022-01-31 14:28:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:28:26,030 INFO L225 Difference]: With dead ends: 1897 [2022-01-31 14:28:26,030 INFO L226 Difference]: Without dead ends: 1888 [2022-01-31 14:28:26,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 14:28:26,031 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 114 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 14:28:26,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 635 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 14:28:26,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2022-01-31 14:28:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1729. [2022-01-31 14:28:26,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1098 states have (on average 1.138433515482696) internal successors, (1250), 1113 states have internal predecessors, (1250), 461 states have call successors, (461), 170 states have call predecessors, (461), 169 states have return successors, (459), 445 states have call predecessors, (459), 459 states have call successors, (459) [2022-01-31 14:28:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2170 transitions. [2022-01-31 14:28:26,065 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2170 transitions. Word has length 134 [2022-01-31 14:28:26,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:28:26,065 INFO L470 AbstractCegarLoop]: Abstraction has 1729 states and 2170 transitions. [2022-01-31 14:28:26,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 14 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2022-01-31 14:28:26,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2170 transitions. [2022-01-31 14:28:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-31 14:28:26,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:28:26,096 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:28:26,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 14:28:26,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:28:26,304 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:28:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:28:26,305 INFO L85 PathProgramCache]: Analyzing trace with hash -42185316, now seen corresponding path program 2 times [2022-01-31 14:28:26,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:28:26,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936032551] [2022-01-31 14:28:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:28:26,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:28:26,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:28:26,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135575031] [2022-01-31 14:28:26,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:28:26,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:28:26,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:28:26,315 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) [2022-01-31 14:28:26,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 14:28:26,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:28:26,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:28:26,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 14:28:26,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:28:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 72 proven. 2606 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-01-31 14:28:26,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:28:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 72 proven. 302 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-01-31 14:28:27,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:28:27,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936032551] [2022-01-31 14:28:27,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:28:27,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135575031] [2022-01-31 14:28:27,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135575031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:28:27,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:28:27,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-01-31 14:28:27,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491994575] [2022-01-31 14:28:27,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:28:27,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 14:28:27,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:28:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 14:28:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 14:28:27,429 INFO L87 Difference]: Start difference. First operand 1729 states and 2170 transitions. Second operand has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-01-31 14:28:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:28:28,418 INFO L93 Difference]: Finished difference Result 6927 states and 9405 transitions. [2022-01-31 14:28:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 14:28:28,418 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) Word has length 260 [2022-01-31 14:28:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:28:28,443 INFO L225 Difference]: With dead ends: 6927 [2022-01-31 14:28:28,443 INFO L226 Difference]: Without dead ends: 6925 [2022-01-31 14:28:28,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1384, Invalid=2398, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 14:28:28,444 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 706 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 14:28:28,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 644 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 14:28:28,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2022-01-31 14:28:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 6797. [2022-01-31 14:28:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6797 states, 4391 states have (on average 1.223183785014803) internal successors, (5371), 4532 states have internal predecessors, (5371), 1967 states have call successors, (1967), 440 states have call predecessors, (1967), 438 states have return successors, (1951), 1824 states have call predecessors, (1951), 1951 states have call successors, (1951) [2022-01-31 14:28:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6797 states to 6797 states and 9289 transitions. [2022-01-31 14:28:28,617 INFO L78 Accepts]: Start accepts. Automaton has 6797 states and 9289 transitions. Word has length 260 [2022-01-31 14:28:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:28:28,617 INFO L470 AbstractCegarLoop]: Abstraction has 6797 states and 9289 transitions. [2022-01-31 14:28:28,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.264705882352941) internal successors, (145), 34 states have internal predecessors, (145), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-01-31 14:28:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 6797 states and 9289 transitions. [2022-01-31 14:28:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 14:28:28,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:28:28,623 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:28:28,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 14:28:28,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:28:28,851 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:28:28,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:28:28,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2118395671, now seen corresponding path program 1 times [2022-01-31 14:28:28,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:28:28,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451681225] [2022-01-31 14:28:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:28:28,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:28:28,861 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:28:28,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743568445] [2022-01-31 14:28:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:28:28,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:28:28,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:28:28,863 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) [2022-01-31 14:28:28,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 14:28:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:28:28,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 14:28:28,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:28:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2941 backedges. 91 proven. 2610 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-01-31 14:28:29,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:28:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2941 backedges. 91 proven. 306 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2022-01-31 14:28:30,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:28:30,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451681225] [2022-01-31 14:28:30,024 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:28:30,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743568445] [2022-01-31 14:28:30,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743568445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:28:30,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:28:30,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-01-31 14:28:30,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093312550] [2022-01-31 14:28:30,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:28:30,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 14:28:30,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:28:30,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 14:28:30,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 14:28:30,026 INFO L87 Difference]: Start difference. First operand 6797 states and 9289 transitions. Second operand has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-01-31 14:28:31,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:28:31,124 INFO L93 Difference]: Finished difference Result 4561 states and 5658 transitions. [2022-01-31 14:28:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 14:28:31,132 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) Word has length 263 [2022-01-31 14:28:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:28:31,147 INFO L225 Difference]: With dead ends: 4561 [2022-01-31 14:28:31,147 INFO L226 Difference]: Without dead ends: 4561 [2022-01-31 14:28:31,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1383, Invalid=2399, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 14:28:31,149 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 727 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 14:28:31,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 745 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 14:28:31,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2022-01-31 14:28:31,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 4273. [2022-01-31 14:28:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 2618 states have (on average 1.1130634071810543) internal successors, (2914), 2649 states have internal predecessors, (2914), 1229 states have call successors, (1229), 426 states have call predecessors, (1229), 425 states have return successors, (1227), 1197 states have call predecessors, (1227), 1227 states have call successors, (1227) [2022-01-31 14:28:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 5370 transitions. [2022-01-31 14:28:31,219 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 5370 transitions. Word has length 263 [2022-01-31 14:28:31,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:28:31,220 INFO L470 AbstractCegarLoop]: Abstraction has 4273 states and 5370 transitions. [2022-01-31 14:28:31,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.323529411764706) internal successors, (147), 34 states have internal predecessors, (147), 22 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (82), 20 states have call predecessors, (82), 21 states have call successors, (82) [2022-01-31 14:28:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 5370 transitions. [2022-01-31 14:28:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-01-31 14:28:31,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:28:31,232 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 76, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 11, 11, 11, 10, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:28:31,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 14:28:31,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:28:31,443 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:28:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:28:31,444 INFO L85 PathProgramCache]: Analyzing trace with hash 678663881, now seen corresponding path program 2 times [2022-01-31 14:28:31,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:28:31,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791655169] [2022-01-31 14:28:31,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:28:31,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:28:31,468 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:28:31,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615855195] [2022-01-31 14:28:31,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:28:31,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:28:31,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:28:31,480 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) [2022-01-31 14:28:31,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 14:28:31,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:28:31,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:28:31,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-31 14:28:31,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:28:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13053 backedges. 184 proven. 12389 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-01-31 14:28:32,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:28:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13053 backedges. 184 proven. 1445 refuted. 0 times theorem prover too weak. 11424 trivial. 0 not checked. [2022-01-31 14:28:34,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:28:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791655169] [2022-01-31 14:28:34,230 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:28:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615855195] [2022-01-31 14:28:34,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615855195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:28:34,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:28:34,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-01-31 14:28:34,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979770194] [2022-01-31 14:28:34,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:28:34,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 14:28:34,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:28:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 14:28:34,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 14:28:34,233 INFO L87 Difference]: Start difference. First operand 4273 states and 5370 transitions. Second operand has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 42 states have call successors, (164), 23 states have call predecessors, (164), 22 states have return successors, (162), 40 states have call predecessors, (162), 41 states have call successors, (162) [2022-01-31 14:28:37,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:28:37,512 INFO L93 Difference]: Finished difference Result 10148 states and 12712 transitions. [2022-01-31 14:28:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 14:28:37,513 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 42 states have call successors, (164), 23 states have call predecessors, (164), 22 states have return successors, (162), 40 states have call predecessors, (162), 41 states have call successors, (162) Word has length 516 [2022-01-31 14:28:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:28:37,551 INFO L225 Difference]: With dead ends: 10148 [2022-01-31 14:28:37,551 INFO L226 Difference]: Without dead ends: 10086 [2022-01-31 14:28:37,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5831, Invalid=9919, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 14:28:37,554 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 2056 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 1758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2056 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1758 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 14:28:37,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2056 Valid, 1253 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1758 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 14:28:37,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10086 states. [2022-01-31 14:28:37,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10086 to 9346. [2022-01-31 14:28:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9346 states, 5642 states have (on average 1.1199929103154909) internal successors, (6319), 5705 states have internal predecessors, (6319), 2766 states have call successors, (2766), 939 states have call predecessors, (2766), 937 states have return successors, (2763), 2701 states have call predecessors, (2763), 2763 states have call successors, (2763) [2022-01-31 14:28:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9346 states to 9346 states and 11848 transitions. [2022-01-31 14:28:37,741 INFO L78 Accepts]: Start accepts. Automaton has 9346 states and 11848 transitions. Word has length 516 [2022-01-31 14:28:37,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:28:37,742 INFO L470 AbstractCegarLoop]: Abstraction has 9346 states and 11848 transitions. [2022-01-31 14:28:37,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 42 states have call successors, (164), 23 states have call predecessors, (164), 22 states have return successors, (162), 40 states have call predecessors, (162), 41 states have call successors, (162) [2022-01-31 14:28:37,742 INFO L276 IsEmpty]: Start isEmpty. Operand 9346 states and 11848 transitions. [2022-01-31 14:28:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-01-31 14:28:37,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:28:37,755 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 80, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 11, 10, 10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:28:37,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-31 14:28:37,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-31 14:28:37,970 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:28:37,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:28:37,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2865793, now seen corresponding path program 3 times [2022-01-31 14:28:37,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:28:37,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887575275] [2022-01-31 14:28:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:28:37,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:28:37,982 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:28:37,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609174887] [2022-01-31 14:28:37,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:28:37,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:28:37,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:28:37,984 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) [2022-01-31 14:28:37,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 14:35:26,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2022-01-31 14:35:26,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:35:26,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-31 14:35:26,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:35:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14354 backedges. 160 proven. 13690 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-01-31 14:35:27,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:35:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14354 backedges. 160 proven. 1530 refuted. 0 times theorem prover too weak. 12664 trivial. 0 not checked. [2022-01-31 14:35:29,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:35:29,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887575275] [2022-01-31 14:35:29,539 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:35:29,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609174887] [2022-01-31 14:35:29,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609174887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:35:29,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:35:29,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-01-31 14:35:29,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916776156] [2022-01-31 14:35:29,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:35:29,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 14:35:29,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:35:29,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 14:35:29,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 14:35:29,542 INFO L87 Difference]: Start difference. First operand 9346 states and 11848 transitions. Second operand has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 44 states have call successors, (172), 24 states have call predecessors, (172), 23 states have return successors, (170), 42 states have call predecessors, (170), 43 states have call successors, (170) [2022-01-31 14:35:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:35:32,340 INFO L93 Difference]: Finished difference Result 9361 states and 11770 transitions. [2022-01-31 14:35:32,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 14:35:32,341 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 44 states have call successors, (172), 24 states have call predecessors, (172), 23 states have return successors, (170), 42 states have call predecessors, (170), 43 states have call successors, (170) Word has length 533 [2022-01-31 14:35:32,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:35:32,359 INFO L225 Difference]: With dead ends: 9361 [2022-01-31 14:35:32,360 INFO L226 Difference]: Without dead ends: 9361 [2022-01-31 14:35:32,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1125 GetRequests, 1001 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2693 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5832, Invalid=9918, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 14:35:32,363 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 1470 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 1426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1426 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 14:35:32,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1470 Valid, 1448 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1426 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 14:35:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9361 states. [2022-01-31 14:35:32,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9361 to 9361. [2022-01-31 14:35:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9361 states, 5658 states have (on average 1.1032166843407565) internal successors, (6242), 5721 states have internal predecessors, (6242), 2765 states have call successors, (2765), 938 states have call predecessors, (2765), 937 states have return successors, (2763), 2701 states have call predecessors, (2763), 2763 states have call successors, (2763) [2022-01-31 14:35:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9361 states to 9361 states and 11770 transitions. [2022-01-31 14:35:32,501 INFO L78 Accepts]: Start accepts. Automaton has 9361 states and 11770 transitions. Word has length 533 [2022-01-31 14:35:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:35:32,502 INFO L470 AbstractCegarLoop]: Abstraction has 9361 states and 11770 transitions. [2022-01-31 14:35:32,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.303030303030303) internal successors, (284), 66 states have internal predecessors, (284), 44 states have call successors, (172), 24 states have call predecessors, (172), 23 states have return successors, (170), 42 states have call predecessors, (170), 43 states have call successors, (170) [2022-01-31 14:35:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 9361 states and 11770 transitions. [2022-01-31 14:35:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1061 [2022-01-31 14:35:32,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:35:32,527 INFO L514 BasicCegarLoop]: trace histogram [165, 164, 164, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 22, 21, 21, 21, 21, 20, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:35:32,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-31 14:35:32,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-31 14:35:32,746 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:35:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:35:32,746 INFO L85 PathProgramCache]: Analyzing trace with hash 609256572, now seen corresponding path program 4 times [2022-01-31 14:35:32,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:35:32,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337891444] [2022-01-31 14:35:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:35:32,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:35:32,767 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:35:32,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159690468] [2022-01-31 14:35:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 14:35:32,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:35:32,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:35:32,769 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) [2022-01-31 14:35:32,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 14:35:55,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 14:35:55,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:35:55,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 2431 conjuncts, 129 conjunts are in the unsatisfiable core [2022-01-31 14:35:55,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:35:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 60438 backedges. 328 proven. 59102 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2022-01-31 14:35:58,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:36:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 60438 backedges. 328 proven. 6622 refuted. 0 times theorem prover too weak. 53488 trivial. 0 not checked. [2022-01-31 14:36:01,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:36:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337891444] [2022-01-31 14:36:01,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:36:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159690468] [2022-01-31 14:36:01,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159690468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:36:01,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:36:01,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 104 [2022-01-31 14:36:01,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266110089] [2022-01-31 14:36:01,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:36:01,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 14:36:01,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:36:01,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 14:36:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 14:36:01,091 INFO L87 Difference]: Start difference. First operand 9361 states and 11770 transitions. Second operand has 104 states, 104 states have (on average 5.240384615384615) internal successors, (545), 104 states have internal predecessors, (545), 77 states have call successors, (340), 44 states have call predecessors, (340), 43 states have return successors, (338), 75 states have call predecessors, (338), 76 states have call successors, (338)