/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/hard-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 14:45:33,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 14:45:33,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 14:45:33,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 14:45:33,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 14:45:33,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 14:45:33,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 14:45:33,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 14:45:33,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 14:45:33,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 14:45:33,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 14:45:33,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 14:45:33,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 14:45:33,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 14:45:33,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 14:45:33,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 14:45:33,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 14:45:33,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 14:45:33,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 14:45:33,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 14:45:33,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 14:45:33,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 14:45:33,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 14:45:33,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 14:45:33,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 14:45:33,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 14:45:33,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 14:45:33,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 14:45:33,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 14:45:33,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 14:45:33,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 14:45:33,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 14:45:33,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 14:45:33,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 14:45:33,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 14:45:33,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 14:45:33,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 14:45:33,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 14:45:33,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 14:45:33,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 14:45:33,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 14:45:33,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 14:45:33,341 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 14:45:33,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 14:45:33,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 14:45:33,343 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 14:45:33,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 14:45:33,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 14:45:33,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 14:45:33,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 14:45:33,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 14:45:33,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 14:45:33,344 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 14:45:33,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 14:45:33,344 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 14:45:33,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 14:45:33,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 14:45:33,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 14:45:33,344 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 14:45:33,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 14:45:33,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:45:33,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 14:45:33,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 14:45:33,345 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 14:45:33,345 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 14:45:33,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 14:45:33,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 14:45:33,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 14:45:33,516 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 14:45:33,518 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 14:45:33,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2022-01-31 14:45:33,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa8fa94ce/9d81fb9281024885a6129af93ab2eff8/FLAG91308f07c [2022-01-31 14:45:33,913 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 14:45:33,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2022-01-31 14:45:33,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa8fa94ce/9d81fb9281024885a6129af93ab2eff8/FLAG91308f07c [2022-01-31 14:45:34,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa8fa94ce/9d81fb9281024885a6129af93ab2eff8 [2022-01-31 14:45:34,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 14:45:34,363 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 14:45:34,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 14:45:34,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 14:45:34,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 14:45:34,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:45:34" (1/1) ... [2022-01-31 14:45:34,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f3e578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:45:34, skipping insertion in model container [2022-01-31 14:45:34,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:45:34" (1/1) ... [2022-01-31 14:45:34,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 14:45:34,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 14:45:34,538 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c[538,551] [2022-01-31 14:45:34,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:45:34,568 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 14:45:34,577 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c[538,551] [2022-01-31 14:45:34,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:45:34,604 INFO L208 MainTranslator]: Completed translation [2022-01-31 14:45:34,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:45:34 WrapperNode [2022-01-31 14:45:34,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 14:45:34,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 14:45:34,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 14:45:34,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 14:45:34,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:45:34" (1/1) ... [2022-01-31 14:45:34,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:45:34" (1/1) ... [2022-01-31 14:45:34,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:45:34" (1/1) ... [2022-01-31 14:45:34,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:45:34" (1/1) ... [2022-01-31 14:45:34,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:45:34" (1/1) ... [2022-01-31 14:45:34,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:45:34" (1/1) ... [2022-01-31 14:45:34,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:45:34" (1/1) ... [2022-01-31 14:45:34,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 14:45:34,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 14:45:34,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 14:45:34,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 14:45:34,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:45:34" (1/1) ... [2022-01-31 14:45:34,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:45:34,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:45:34,679 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 14:45:34,716 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 14:45:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 14:45:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 14:45:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 14:45:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 14:45:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 14:45:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 14:45:34,726 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 14:45:34,726 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 14:45:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 14:45:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 14:45:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 14:45:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 14:45:34,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 14:45:34,728 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 14:45:34,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 14:45:34,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 14:45:34,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 14:45:34,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 14:45:34,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 14:45:34,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 14:45:34,772 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 14:45:34,773 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 14:45:34,868 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 14:45:34,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 14:45:34,872 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 14:45:34,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:45:34 BoogieIcfgContainer [2022-01-31 14:45:34,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 14:45:34,874 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 14:45:34,874 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 14:45:34,875 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 14:45:34,877 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:45:34" (1/1) ... [2022-01-31 14:45:34,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:45:34 BasicIcfg [2022-01-31 14:45:34,891 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 14:45:34,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 14:45:34,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 14:45:34,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 14:45:34,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:45:34" (1/4) ... [2022-01-31 14:45:34,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c08e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:45:34, skipping insertion in model container [2022-01-31 14:45:34,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:45:34" (2/4) ... [2022-01-31 14:45:34,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c08e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:45:34, skipping insertion in model container [2022-01-31 14:45:34,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:45:34" (3/4) ... [2022-01-31 14:45:34,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c08e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 02:45:34, skipping insertion in model container [2022-01-31 14:45:34,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:45:34" (4/4) ... [2022-01-31 14:45:34,898 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.cJordan [2022-01-31 14:45:34,902 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 14:45:34,902 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 14:45:34,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 14:45:34,932 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 14:45:34,932 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 14:45:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 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 14:45:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 14:45:34,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:45:34,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:45:34,946 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:45:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:45:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-01-31 14:45:34,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:45:34,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886305322] [2022-01-31 14:45:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:34,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:45:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 14:45:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 14:45:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 14:45:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 14:45:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 14:45:35,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:45:35,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886305322] [2022-01-31 14:45:35,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886305322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:45:35,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:45:35,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 14:45:35,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821768730] [2022-01-31 14:45:35,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:45:35,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 14:45:35,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:45:35,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 14:45:35,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 14:45:35,172 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 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 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 14:45:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:45:35,246 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-01-31 14:45:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 14:45:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-01-31 14:45:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:45:35,255 INFO L225 Difference]: With dead ends: 38 [2022-01-31 14:45:35,255 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 14:45:35,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 14:45:35,261 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:45:35,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:45:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 14:45:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 14:45:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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 14:45:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-01-31 14:45:35,293 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-01-31 14:45:35,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:45:35,294 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-01-31 14:45:35,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 14:45:35,295 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-01-31 14:45:35,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 14:45:35,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:45:35,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:45:35,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 14:45:35,297 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:45:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:45:35,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-01-31 14:45:35,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:45:35,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959889953] [2022-01-31 14:45:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:35,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:45:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 14:45:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 14:45:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 14:45:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 14:45:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 14:45:35,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:45:35,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959889953] [2022-01-31 14:45:35,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959889953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:45:35,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:45:35,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 14:45:35,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062704836] [2022-01-31 14:45:35,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:45:35,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 14:45:35,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:45:35,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 14:45:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:45:35,420 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 14:45:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:45:35,548 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-01-31 14:45:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 14:45:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-01-31 14:45:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:45:35,549 INFO L225 Difference]: With dead ends: 44 [2022-01-31 14:45:35,549 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 14:45:35,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:45:35,550 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:45:35,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:45:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 14:45:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-01-31 14:45:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 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 14:45:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-01-31 14:45:35,557 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-01-31 14:45:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:45:35,558 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-01-31 14:45:35,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 14:45:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-01-31 14:45:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 14:45:35,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:45:35,559 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2022-01-31 14:45:35,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 14:45:35,559 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:45:35,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:45:35,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-01-31 14:45:35,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:45:35,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408729842] [2022-01-31 14:45:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:35,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:45:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 14:45:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 14:45:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 14:45:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 14:45:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 14:45:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 14:45:35,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:45:35,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408729842] [2022-01-31 14:45:35,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408729842] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:45:35,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:45:35,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 14:45:35,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354580979] [2022-01-31 14:45:35,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:45:35,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 14:45:35,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:45:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 14:45:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:45:35,647 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:45:35,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:45:35,772 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-01-31 14:45:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 14:45:35,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-01-31 14:45:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:45:35,773 INFO L225 Difference]: With dead ends: 48 [2022-01-31 14:45:35,773 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 14:45:35,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:45:35,775 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:45:35,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:45:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 14:45:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-01-31 14:45:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 14:45:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-01-31 14:45:35,783 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-01-31 14:45:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:45:35,783 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-01-31 14:45:35,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 14:45:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-01-31 14:45:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 14:45:35,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:45:35,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-01-31 14:45:35,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 14:45:35,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:45:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:45:35,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-01-31 14:45:35,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:45:35,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400863569] [2022-01-31 14:45:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:35,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:45:35,795 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:45:35,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699784718] [2022-01-31 14:45:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:35,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:45:35,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:45:35,797 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 14:45:35,843 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 14:45:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:35,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 14:45:35,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:45:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 14:45:36,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:45:36,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:45:36,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400863569] [2022-01-31 14:45:36,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:45:36,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699784718] [2022-01-31 14:45:36,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699784718] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:45:36,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:45:36,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 14:45:36,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049369076] [2022-01-31 14:45:36,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:45:36,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 14:45:36,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:45:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 14:45:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 14:45:36,080 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 14:45:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:45:36,170 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-01-31 14:45:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 14:45:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-01-31 14:45:36,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:45:36,171 INFO L225 Difference]: With dead ends: 56 [2022-01-31 14:45:36,171 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 14:45:36,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:45:36,172 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:45:36,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:45:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 14:45:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-31 14:45:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 14:45:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-01-31 14:45:36,193 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-01-31 14:45:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:45:36,194 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-01-31 14:45:36,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 14:45:36,195 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-01-31 14:45:36,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 14:45:36,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:45:36,197 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:45:36,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 14:45:36,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:45:36,415 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:45:36,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:45:36,418 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-01-31 14:45:36,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:45:36,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958090706] [2022-01-31 14:45:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:36,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:45:36,429 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:45:36,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578668595] [2022-01-31 14:45:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:36,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:45:36,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:45:36,431 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 14:45:36,433 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 14:45:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:36,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 14:45:36,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:45:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 14:45:36,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:45:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 14:45:36,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:45:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958090706] [2022-01-31 14:45:36,887 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:45:36,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578668595] [2022-01-31 14:45:36,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578668595] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:45:36,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:45:36,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-01-31 14:45:36,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485217053] [2022-01-31 14:45:36,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:45:36,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 14:45:36,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:45:36,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 14:45:36,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:45:36,889 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 14:45:36,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:45:36,962 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-01-31 14:45:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:45:36,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-01-31 14:45:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:45:36,964 INFO L225 Difference]: With dead ends: 66 [2022-01-31 14:45:36,964 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 14:45:36,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:45:36,965 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:45:36,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:45:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 14:45:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-01-31 14:45:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 14:45:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-01-31 14:45:36,970 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-01-31 14:45:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:45:36,970 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-01-31 14:45:36,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 14:45:36,987 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-01-31 14:45:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 14:45:36,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:45:36,989 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:45:37,006 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 14:45:37,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:45:37,190 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:45:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:45:37,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-01-31 14:45:37,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:45:37,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775023969] [2022-01-31 14:45:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:37,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:45:37,209 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:45:37,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777910729] [2022-01-31 14:45:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:37,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:45:37,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:45:37,216 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 14:45:37,251 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 14:45:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:37,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 14:45:37,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:45:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-31 14:45:37,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:45:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-31 14:45:37,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:45:37,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775023969] [2022-01-31 14:45:37,575 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:45:37,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777910729] [2022-01-31 14:45:37,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777910729] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:45:37,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:45:37,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-01-31 14:45:37,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086433086] [2022-01-31 14:45:37,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:45:37,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:45:37,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:45:37,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:45:37,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:45:37,581 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 14:45:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:45:37,628 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-01-31 14:45:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:45:37,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 55 [2022-01-31 14:45:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:45:37,631 INFO L225 Difference]: With dead ends: 74 [2022-01-31 14:45:37,631 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 14:45:37,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:45:37,633 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:45:37,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:45:37,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 14:45:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-01-31 14:45:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 14:45:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-01-31 14:45:37,651 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-01-31 14:45:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:45:37,651 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-01-31 14:45:37,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 14:45:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-01-31 14:45:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 14:45:37,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:45:37,652 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 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, 1, 1] [2022-01-31 14:45:37,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 14:45:37,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:45:37,873 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:45:37,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:45:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-01-31 14:45:37,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:45:37,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127002536] [2022-01-31 14:45:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:37,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:45:37,886 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:45:37,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075489878] [2022-01-31 14:45:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:37,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:45:37,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:45:37,899 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 14:45:37,918 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 14:45:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:37,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:45:37,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:45:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 14:45:38,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:45:38,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:45:38,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127002536] [2022-01-31 14:45:38,075 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:45:38,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075489878] [2022-01-31 14:45:38,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075489878] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:45:38,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:45:38,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:45:38,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389303585] [2022-01-31 14:45:38,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:45:38,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:45:38,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:45:38,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:45:38,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:45:38,076 INFO L87 Difference]: Start difference. First operand 71 states and 88 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-31 14:45:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:45:38,114 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2022-01-31 14:45:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:45:38,114 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-01-31 14:45:38,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:45:38,116 INFO L225 Difference]: With dead ends: 77 [2022-01-31 14:45:38,116 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 14:45:38,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 14:45:38,116 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:45:38,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:45:38,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 14:45:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-31 14:45:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 14:45:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-01-31 14:45:38,120 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-01-31 14:45:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:45:38,120 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-01-31 14:45:38,121 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, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-31 14:45:38,121 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-01-31 14:45:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 14:45:38,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:45:38,122 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:45:38,163 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 14:45:38,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:45:38,331 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:45:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:45:38,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2022-01-31 14:45:38,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:45:38,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937388036] [2022-01-31 14:45:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:38,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:45:38,339 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:45:38,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032042449] [2022-01-31 14:45:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:45:38,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:45:38,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:45:38,340 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 14:45:38,355 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 14:45:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:45:38,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 14:45:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:45:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-01-31 14:45:39,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:46:10,186 WARN L228 SmtUtils]: Spent 16.59s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:47:12,117 WARN L228 SmtUtils]: Spent 22.46s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:48:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-01-31 14:48:03,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:48:03,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937388036] [2022-01-31 14:48:03,556 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:48:03,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032042449] [2022-01-31 14:48:03,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032042449] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:48:03,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:48:03,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-01-31 14:48:03,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333466742] [2022-01-31 14:48:03,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:48:03,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 14:48:03,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:48:03,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 14:48:03,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=240, Unknown=1, NotChecked=0, Total=306 [2022-01-31 14:48:03,557 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-31 14:48:05,567 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 14:48:18,209 WARN L228 SmtUtils]: Spent 11.90s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:48:21,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:48:23,146 WARN L534 Checker$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 14:48:25,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:48:26,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:48:28,444 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 (<= c_main_~d~0 c_main_~r~0)) (.cse0 (mod c_main_~A~0 4294967296)) (.cse2 (mod c_main_~B~0 4294967296))) (and (let ((.cse1 (* 2 c_main_~p~0)) (.cse3 (* 2 c_main_~d~0))) (or (= .cse0 (+ (* (+ c_main_~q~0 (div .cse1 2)) .cse2) (* (- 1) (div .cse3 2)) c_main_~r~0)) (not (= (* .cse1 .cse2) .cse3)) (not .cse4) (<= .cse3 c_main_~r~0))) (or .cse4 (not (= c_main_~d~0 (* c_main_~p~0 .cse2))) (let ((.cse7 (= (mod c_main_~p~0 2) 0)) (.cse13 (div c_main_~p~0 2))) (let ((.cse9 (* (+ c_main_~q~0 .cse13) .cse2)) (.cse10 (not .cse7)) (.cse5 (* (- 1) (div c_main_~d~0 2))) (.cse6 (* (+ c_main_~q~0 .cse13 1) .cse2)) (.cse12 (= (mod c_main_~d~0 2) 0)) (.cse11 (< c_main_~d~0 0))) (and (or (let ((.cse8 (< c_main_~p~0 0))) (and (or (= .cse0 (+ c_main_~r~0 .cse5 .cse6)) .cse7 (not .cse8)) (or (= .cse0 (+ .cse9 c_main_~r~0 .cse5)) (and .cse10 .cse8)))) (and .cse11 (not .cse12))) (or (and (or (= .cse0 (+ (- 1) .cse9 c_main_~r~0 .cse5)) .cse10) (or .cse7 (= .cse0 (+ (- 1) c_main_~r~0 .cse5 .cse6)))) .cse12 (not .cse11)))))))) is different from true [2022-01-31 14:48:30,455 WARN L534 Checker$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 14:48:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:48:32,265 INFO L93 Difference]: Finished difference Result 117 states and 150 transitions. [2022-01-31 14:48:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 14:48:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2022-01-31 14:48:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:48:32,267 INFO L225 Difference]: With dead ends: 117 [2022-01-31 14:48:32,267 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 14:48:32,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 57.1s TimeCoverageRelationStatistics Valid=107, Invalid=401, Unknown=2, NotChecked=42, Total=552 [2022-01-31 14:48:32,268 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 131 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:48:32,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 284 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 338 Invalid, 5 Unknown, 6 Unchecked, 14.0s Time] [2022-01-31 14:48:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 14:48:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2022-01-31 14:48:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 14:48:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-01-31 14:48:32,274 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 75 [2022-01-31 14:48:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:48:32,274 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-01-31 14:48:32,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-31 14:48:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-01-31 14:48:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 14:48:32,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:48:32,275 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:48:32,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 14:48:32,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:48:32,476 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:48:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:48:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2022-01-31 14:48:32,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:48:32,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734486817] [2022-01-31 14:48:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:48:32,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:48:32,483 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:48:32,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734709416] [2022-01-31 14:48:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:48:32,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:48:32,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:48:32,485 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 14:48:32,488 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 14:48:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:48:32,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 14:48:32,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:48:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-01-31 14:48:32,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:48:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-01-31 14:48:32,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:48:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734486817] [2022-01-31 14:48:32,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:48:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734709416] [2022-01-31 14:48:32,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734709416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:48:32,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:48:32,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 14:48:32,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322427503] [2022-01-31 14:48:32,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:48:32,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 14:48:32,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:48:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 14:48:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:48:32,993 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-31 14:48:33,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:48:33,163 INFO L93 Difference]: Finished difference Result 114 states and 141 transitions. [2022-01-31 14:48:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 14:48:33,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-01-31 14:48:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:48:33,164 INFO L225 Difference]: With dead ends: 114 [2022-01-31 14:48:33,164 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 14:48:33,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:48:33,165 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 14:48:33,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 258 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 14:48:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 14:48:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-01-31 14:48:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 67 states have internal predecessors, (72), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 14:48:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-01-31 14:48:33,169 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 86 [2022-01-31 14:48:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:48:33,170 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-01-31 14:48:33,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-01-31 14:48:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-01-31 14:48:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 14:48:33,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:48:33,171 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:48:33,201 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 14:48:33,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:48:33,372 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:48:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:48:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1406960063, now seen corresponding path program 2 times [2022-01-31 14:48:33,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:48:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023409953] [2022-01-31 14:48:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:48:33,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:48:33,379 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:48:33,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539120620] [2022-01-31 14:48:33,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:48:33,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:48:33,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:48:33,380 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 14:48:33,438 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 14:48:33,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:48:33,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:48:33,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:48:33,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:48:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-31 14:48:33,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:48:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-01-31 14:48:33,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:48:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023409953] [2022-01-31 14:48:33,726 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:48:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539120620] [2022-01-31 14:48:33,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539120620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:48:33,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:48:33,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-01-31 14:48:33,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478584068] [2022-01-31 14:48:33,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:48:33,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:48:33,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:48:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:48:33,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:48:33,728 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-01-31 14:48:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:48:33,799 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2022-01-31 14:48:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 14:48:33,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 88 [2022-01-31 14:48:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:48:33,801 INFO L225 Difference]: With dead ends: 111 [2022-01-31 14:48:33,801 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 14:48:33,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:48:33,802 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:48:33,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 139 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:48:33,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 14:48:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-01-31 14:48:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.15625) internal successors, (74), 69 states have internal predecessors, (74), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 14:48:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2022-01-31 14:48:33,807 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 88 [2022-01-31 14:48:33,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:48:33,808 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2022-01-31 14:48:33,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-01-31 14:48:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2022-01-31 14:48:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 14:48:33,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:48:33,818 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:48:33,834 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 14:48:34,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:48:34,032 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:48:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:48:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash 966352941, now seen corresponding path program 1 times [2022-01-31 14:48:34,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:48:34,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390832414] [2022-01-31 14:48:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:48:34,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:48:34,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:48:34,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375469828] [2022-01-31 14:48:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:48:34,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:48:34,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:48:34,048 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 14:48:34,049 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 14:48:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:48:34,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 14:48:34,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:48:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-01-31 14:48:34,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:48:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-01-31 14:48:34,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:48:34,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390832414] [2022-01-31 14:48:34,629 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:48:34,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375469828] [2022-01-31 14:48:34,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375469828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:48:34,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:48:34,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-01-31 14:48:34,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451613167] [2022-01-31 14:48:34,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:48:34,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 14:48:34,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:48:34,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 14:48:34,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:48:34,630 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-01-31 14:48:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:48:34,930 INFO L93 Difference]: Finished difference Result 117 states and 146 transitions. [2022-01-31 14:48:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 14:48:34,930 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-01-31 14:48:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:48:34,931 INFO L225 Difference]: With dead ends: 117 [2022-01-31 14:48:34,931 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 14:48:34,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:48:34,932 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 14:48:34,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 408 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 14:48:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 14:48:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-01-31 14:48:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 14:48:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-01-31 14:48:34,936 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 91 [2022-01-31 14:48:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:48:34,936 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-01-31 14:48:34,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-01-31 14:48:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-01-31 14:48:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 14:48:34,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:48:34,937 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1, 1, 1] [2022-01-31 14:48:34,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 14:48:35,137 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,SelfDestructingSolverStorable10 [2022-01-31 14:48:35,138 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:48:35,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:48:35,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1871497790, now seen corresponding path program 1 times [2022-01-31 14:48:35,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:48:35,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774133028] [2022-01-31 14:48:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:48:35,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:48:35,143 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:48:35,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287347474] [2022-01-31 14:48:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:48:35,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:48:35,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:48:35,151 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 14:48:35,173 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 14:48:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:48:35,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 14:48:35,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:48:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-01-31 14:48:35,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:48:35,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:48:35,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774133028] [2022-01-31 14:48:35,351 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:48:35,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287347474] [2022-01-31 14:48:35,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287347474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:48:35,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:48:35,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:48:35,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375107066] [2022-01-31 14:48:35,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:48:35,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:48:35,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:48:35,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:48:35,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:48:35,352 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-31 14:48:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:48:35,391 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-01-31 14:48:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:48:35,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 95 [2022-01-31 14:48:35,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:48:35,393 INFO L225 Difference]: With dead ends: 104 [2022-01-31 14:48:35,393 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 14:48:35,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:48:35,394 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:48:35,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 129 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:48:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 14:48:35,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-31 14:48:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 64 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 14:48:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-01-31 14:48:35,401 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 95 [2022-01-31 14:48:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:48:35,402 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-01-31 14:48:35,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-01-31 14:48:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-01-31 14:48:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 14:48:35,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:48:35,404 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:48:35,423 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 14:48:35,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:48:35,624 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:48:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:48:35,624 INFO L85 PathProgramCache]: Analyzing trace with hash -317970408, now seen corresponding path program 3 times [2022-01-31 14:48:35,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:48:35,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329371294] [2022-01-31 14:48:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:48:35,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:48:35,646 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:48:35,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281594247] [2022-01-31 14:48:35,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:48:35,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:48:35,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:48:35,647 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 14:48:35,674 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 14:48:35,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 14:48:35,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:48:35,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 14:48:35,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:48:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-01-31 14:48:36,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:49:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-01-31 14:49:21,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:49:21,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329371294] [2022-01-31 14:49:21,742 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:49:21,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281594247] [2022-01-31 14:49:21,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281594247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:49:21,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:49:21,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-01-31 14:49:21,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302870310] [2022-01-31 14:49:21,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:49:21,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 14:49:21,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:49:21,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 14:49:21,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=277, Unknown=1, NotChecked=0, Total=342 [2022-01-31 14:49:21,744 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) [2022-01-31 14:50:32,438 WARN L228 SmtUtils]: Spent 1.15m on a formula simplification. DAG size of input: 196 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:50:34,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:50:36,454 WARN L534 Checker$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 14:50:38,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:50:39,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:50:41,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:50:43,960 WARN L534 Checker$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 14:50:46,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:50:49,338 WARN L534 Checker$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 14:50:51,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:51:00,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:51:02,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:51:05,120 WARN L534 Checker$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 14:51:11,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:51:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:51:12,787 INFO L93 Difference]: Finished difference Result 196 states and 262 transitions. [2022-01-31 14:51:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 14:51:12,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) Word has length 105 [2022-01-31 14:51:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:51:12,789 INFO L225 Difference]: With dead ends: 196 [2022-01-31 14:51:12,789 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 14:51:12,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 189 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 89.1s TimeCoverageRelationStatistics Valid=129, Invalid=518, Unknown=3, NotChecked=0, Total=650 [2022-01-31 14:51:12,790 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 108 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 222 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.7s IncrementalHoareTripleChecker+Time [2022-01-31 14:51:12,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 647 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 709 Invalid, 9 Unknown, 0 Unchecked, 31.7s Time] [2022-01-31 14:51:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 14:51:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 159. [2022-01-31 14:51:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 100 states have internal predecessors, (109), 48 states have call successors, (48), 17 states have call predecessors, (48), 16 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-31 14:51:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 203 transitions. [2022-01-31 14:51:12,796 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 203 transitions. Word has length 105 [2022-01-31 14:51:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:51:12,796 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 203 transitions. [2022-01-31 14:51:12,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) [2022-01-31 14:51:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 203 transitions. [2022-01-31 14:51:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 14:51:12,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:51:12,797 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:51:12,820 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 14:51:13,019 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,SelfDestructingSolverStorable12 [2022-01-31 14:51:13,020 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:51:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:51:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1498631042, now seen corresponding path program 2 times [2022-01-31 14:51:13,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:51:13,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004526463] [2022-01-31 14:51:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:51:13,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:51:13,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:51:13,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971170133] [2022-01-31 14:51:13,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:51:13,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:51:13,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:51:13,034 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 14:51:13,035 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 14:51:13,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:51:13,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:51:13,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 14:51:13,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:51:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 106 proven. 30 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-01-31 14:51:15,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:51:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-01-31 14:51:15,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:51:15,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004526463] [2022-01-31 14:51:15,885 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:51:15,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971170133] [2022-01-31 14:51:15,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971170133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:51:15,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:51:15,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-01-31 14:51:15,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915687405] [2022-01-31 14:51:15,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:51:15,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 14:51:15,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:51:15,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 14:51:15,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-01-31 14:51:15,886 INFO L87 Difference]: Start difference. First operand 159 states and 203 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-01-31 14:51:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:51:17,180 INFO L93 Difference]: Finished difference Result 189 states and 234 transitions. [2022-01-31 14:51:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 14:51:17,181 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 116 [2022-01-31 14:51:17,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:51:17,182 INFO L225 Difference]: With dead ends: 189 [2022-01-31 14:51:17,182 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 14:51:17,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-31 14:51:17,183 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 35 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 14:51:17,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 337 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 14:51:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 14:51:17,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 139. [2022-01-31 14:51:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 84 states have (on average 1.130952380952381) internal successors, (95), 89 states have internal predecessors, (95), 37 states have call successors, (37), 18 states have call predecessors, (37), 17 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-31 14:51:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 167 transitions. [2022-01-31 14:51:17,188 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 167 transitions. Word has length 116 [2022-01-31 14:51:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:51:17,189 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 167 transitions. [2022-01-31 14:51:17,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-01-31 14:51:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 167 transitions. [2022-01-31 14:51:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 14:51:17,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:51:17,190 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:51:17,225 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 14:51:17,390 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,SelfDestructingSolverStorable13 [2022-01-31 14:51:17,391 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:51:17,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:51:17,391 INFO L85 PathProgramCache]: Analyzing trace with hash -715358301, now seen corresponding path program 4 times [2022-01-31 14:51:17,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:51:17,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948806578] [2022-01-31 14:51:17,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:51:17,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:51:17,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:51:17,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412144723] [2022-01-31 14:51:17,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 14:51:17,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:51:17,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:51:17,400 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 14:51:17,401 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 14:51:17,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 14:51:17,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:51:17,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-31 14:51:17,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:51:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-01-31 14:51:18,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:51:37,390 WARN L228 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:52:08,299 WARN L228 SmtUtils]: Spent 6.64s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:53:25,483 WARN L228 SmtUtils]: Spent 32.03s on a formula simplification that was a NOOP. DAG size: 451 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:55:22,116 WARN L228 SmtUtils]: Spent 14.47s on a formula simplification. DAG size of input: 123 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:56:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-01-31 14:56:02,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:56:02,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948806578] [2022-01-31 14:56:02,101 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:56:02,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412144723] [2022-01-31 14:56:02,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412144723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:56:02,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:56:02,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2022-01-31 14:56:02,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939006170] [2022-01-31 14:56:02,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:56:02,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 14:56:02,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:56:02,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 14:56:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-01-31 14:56:02,111 INFO L87 Difference]: Start difference. First operand 139 states and 167 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 18 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (43), 16 states have call predecessors, (43), 16 states have call successors, (43)