/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/dijkstra-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 05:02:23,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 05:02:23,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 05:02:23,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 05:02:23,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 05:02:23,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 05:02:23,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 05:02:23,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 05:02:23,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 05:02:23,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 05:02:23,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 05:02:23,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 05:02:23,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 05:02:23,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 05:02:23,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 05:02:23,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 05:02:23,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 05:02:23,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 05:02:23,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 05:02:23,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 05:02:23,355 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 05:02:23,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 05:02:23,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 05:02:23,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 05:02:23,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 05:02:23,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 05:02:23,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 05:02:23,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 05:02:23,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 05:02:23,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 05:02:23,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 05:02:23,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 05:02:23,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 05:02:23,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 05:02:23,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 05:02:23,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 05:02:23,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 05:02:23,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 05:02:23,387 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 05:02:23,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 05:02:23,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 05:02:23,389 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 05:02:23,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 05:02:23,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 05:02:23,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 05:02:23,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 05:02:23,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 05:02:23,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 05:02:23,390 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 05:02:23,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 05:02:23,391 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 05:02:23,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 05:02:23,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 05:02:23,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 05:02:23,391 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 05:02:23,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 05:02:23,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:02:23,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 05:02:23,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 05:02:23,392 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 05:02:23,392 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 05:02:23,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 05:02:23,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 05:02:23,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 05:02:23,577 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 05:02:23,578 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 05:02:23,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2022-03-20 05:02:23,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d90d5c23d/068c34be3cb74bc496d58ddb78a6f284/FLAG0413065b3 [2022-03-20 05:02:23,939 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 05:02:23,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2022-03-20 05:02:23,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d90d5c23d/068c34be3cb74bc496d58ddb78a6f284/FLAG0413065b3 [2022-03-20 05:02:24,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d90d5c23d/068c34be3cb74bc496d58ddb78a6f284 [2022-03-20 05:02:24,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 05:02:24,366 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 05:02:24,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 05:02:24,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 05:02:24,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 05:02:24,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:02:24" (1/1) ... [2022-03-20 05:02:24,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448baa82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:24, skipping insertion in model container [2022-03-20 05:02:24,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:02:24" (1/1) ... [2022-03-20 05:02:24,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 05:02:24,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 05:02:24,509 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/dijkstra-u_valuebound20.c[525,538] [2022-03-20 05:02:24,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:02:24,536 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 05:02:24,544 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/dijkstra-u_valuebound20.c[525,538] [2022-03-20 05:02:24,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:02:24,563 INFO L208 MainTranslator]: Completed translation [2022-03-20 05:02:24,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:24 WrapperNode [2022-03-20 05:02:24,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 05:02:24,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 05:02:24,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 05:02:24,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 05:02:24,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:24" (1/1) ... [2022-03-20 05:02:24,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:24" (1/1) ... [2022-03-20 05:02:24,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:24" (1/1) ... [2022-03-20 05:02:24,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:24" (1/1) ... [2022-03-20 05:02:24,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:24" (1/1) ... [2022-03-20 05:02:24,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:24" (1/1) ... [2022-03-20 05:02:24,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:24" (1/1) ... [2022-03-20 05:02:24,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 05:02:24,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 05:02:24,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 05:02:24,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 05:02:24,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:24" (1/1) ... [2022-03-20 05:02:24,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:02:24,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:02:24,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 05:02:24,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 05:02:24,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 05:02:24,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 05:02:24,658 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 05:02:24,658 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 05:02:24,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 05:02:24,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 05:02:24,659 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 05:02:24,659 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 05:02:24,659 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 05:02:24,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 05:02:24,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 05:02:24,660 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 05:02:24,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 05:02:24,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 05:02:24,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 05:02:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 05:02:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 05:02:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 05:02:24,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 05:02:24,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 05:02:24,706 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 05:02:24,707 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 05:02:24,837 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 05:02:24,842 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 05:02:24,842 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 05:02:24,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:02:24 BoogieIcfgContainer [2022-03-20 05:02:24,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 05:02:24,844 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 05:02:24,844 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 05:02:24,845 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 05:02:24,847 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:02:24" (1/1) ... [2022-03-20 05:02:24,848 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 05:02:24,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:02:24 BasicIcfg [2022-03-20 05:02:24,863 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 05:02:24,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 05:02:24,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 05:02:24,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 05:02:24,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:02:24" (1/4) ... [2022-03-20 05:02:24,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51552a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:02:24, skipping insertion in model container [2022-03-20 05:02:24,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:02:24" (2/4) ... [2022-03-20 05:02:24,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51552a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:02:24, skipping insertion in model container [2022-03-20 05:02:24,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:02:24" (3/4) ... [2022-03-20 05:02:24,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51552a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:02:24, skipping insertion in model container [2022-03-20 05:02:24,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:02:24" (4/4) ... [2022-03-20 05:02:24,868 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound20.cJordan [2022-03-20 05:02:24,872 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 05:02:24,872 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 05:02:24,943 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 05:02:24,947 INFO L340 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 [2022-03-20 05:02:24,948 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 05:02:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 05:02:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 05:02:24,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:02:24,973 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:02:24,973 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:02:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:02:24,977 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-03-20 05:02:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:02:24,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920845536] [2022-03-20 05:02:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:02:24,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:02:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:25,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 05:02:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:25,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 05:02:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:25,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 05:02:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:02:25,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:02:25,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920845536] [2022-03-20 05:02:25,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920845536] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:02:25,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:02:25,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 05:02:25,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737652604] [2022-03-20 05:02:25,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:02:25,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 05:02:25,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:02:25,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 05:02:25,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 05:02:25,157 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 05:02:27,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 05:02:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:02:27,292 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-03-20 05:02:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 05:02:27,295 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 05:02:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:02:27,300 INFO L225 Difference]: With dead ends: 38 [2022-03-20 05:02:27,300 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 05:02:27,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 05:02:27,306 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:02:27,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 05:02:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 05:02:27,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 05:02:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 05:02:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-03-20 05:02:27,345 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-03-20 05:02:27,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:02:27,345 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-03-20 05:02:27,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 05:02:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-03-20 05:02:27,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 05:02:27,349 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:02:27,349 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:02:27,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 05:02:27,350 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:02:27,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:02:27,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-03-20 05:02:27,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:02:27,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433673641] [2022-03-20 05:02:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:02:27,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:02:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:27,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 05:02:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 05:02:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:27,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 05:02:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:02:27,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:02:27,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433673641] [2022-03-20 05:02:27,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433673641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:02:27,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:02:27,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 05:02:27,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179376139] [2022-03-20 05:02:27,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:02:27,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 05:02:27,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:02:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 05:02:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 05:02:27,658 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 05:02:29,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 05:02:31,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 05:02:34,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:02:36,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 05:02:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:02:38,237 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2022-03-20 05:02:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 05:02:38,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-20 05:02:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:02:38,239 INFO L225 Difference]: With dead ends: 43 [2022-03-20 05:02:38,239 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 05:02:38,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 05:02:38,241 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 25 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-03-20 05:02:38,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 56 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 163 Invalid, 4 Unknown, 0 Unchecked, 10.5s Time] [2022-03-20 05:02:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 05:02:38,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-20 05:02:38,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 05:02:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-03-20 05:02:38,249 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 24 [2022-03-20 05:02:38,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:02:38,249 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-03-20 05:02:38,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 05:02:38,250 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-03-20 05:02:38,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 05:02:38,250 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:02:38,250 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:02:38,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 05:02:38,251 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:02:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:02:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-03-20 05:02:38,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:02:38,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283160712] [2022-03-20 05:02:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:02:38,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:02:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:38,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 05:02:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:38,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 05:02:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:38,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 05:02:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 05:02:38,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:02:38,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283160712] [2022-03-20 05:02:38,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283160712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:02:38,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:02:38,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 05:02:38,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428519955] [2022-03-20 05:02:38,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:02:38,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 05:02:38,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:02:38,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 05:02:38,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 05:02:38,399 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 05:02:41,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 05:02:44,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:02:46,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:02:46,403 INFO L93 Difference]: Finished difference Result 68 states and 99 transitions. [2022-03-20 05:02:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 05:02:46,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-20 05:02:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:02:46,406 INFO L225 Difference]: With dead ends: 68 [2022-03-20 05:02:46,406 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 05:02:46,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 05:02:46,407 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 74 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-03-20 05:02:46,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 54 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2022-03-20 05:02:46,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 05:02:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 05:02:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 28 states have call successors, (28), 6 states have call predecessors, (28), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 05:02:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 91 transitions. [2022-03-20 05:02:46,418 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 91 transitions. Word has length 26 [2022-03-20 05:02:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:02:46,418 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 91 transitions. [2022-03-20 05:02:46,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 05:02:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 91 transitions. [2022-03-20 05:02:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 05:02:46,419 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:02:46,419 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:02:46,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 05:02:46,419 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:02:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:02:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-03-20 05:02:46,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:02:46,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365144531] [2022-03-20 05:02:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:02:46,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:02:46,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:02:46,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583227307] [2022-03-20 05:02:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:02:46,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:02:46,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:02:46,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:02:46,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 05:02:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 05:02:46,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:02:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 05:02:46,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:02:46,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:02:46,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365144531] [2022-03-20 05:02:46,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:02:46,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583227307] [2022-03-20 05:02:46,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583227307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:02:46,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:02:46,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:02:46,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566310821] [2022-03-20 05:02:46,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:02:46,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:02:46,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:02:46,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:02:46,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:02:46,674 INFO L87 Difference]: Start difference. First operand 64 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:02:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:02:48,303 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2022-03-20 05:02:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:02:48,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-20 05:02:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:02:48,309 INFO L225 Difference]: With dead ends: 80 [2022-03-20 05:02:48,309 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 05:02:48,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:02:48,310 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 05:02:48,310 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 166 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 05:02:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 05:02:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-20 05:02:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 40 states have internal predecessors, (45), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 05:02:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2022-03-20 05:02:48,321 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 34 [2022-03-20 05:02:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:02:48,322 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2022-03-20 05:02:48,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:02:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2022-03-20 05:02:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 05:02:48,322 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:02:48,323 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:02:48,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 05:02:48,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:02:48,528 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:02:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:02:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-03-20 05:02:48,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:02:48,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806736161] [2022-03-20 05:02:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:02:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:02:48,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:02:48,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097136886] [2022-03-20 05:02:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:02:48,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:02:48,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:02:48,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:02:48,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 05:02:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:48,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 05:02:48,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:02:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 05:02:48,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:02:48,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:02:48,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806736161] [2022-03-20 05:02:48,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:02:48,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097136886] [2022-03-20 05:02:48,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097136886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:02:48,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:02:48,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:02:48,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065386479] [2022-03-20 05:02:48,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:02:48,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:02:48,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:02:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:02:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:02:48,747 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:02:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:02:49,406 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2022-03-20 05:02:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:02:49,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-20 05:02:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:02:49,407 INFO L225 Difference]: With dead ends: 90 [2022-03-20 05:02:49,407 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 05:02:49,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:02:49,408 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 05:02:49,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 169 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 05:02:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 05:02:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-03-20 05:02:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 43 states have (on average 1.186046511627907) internal successors, (51), 47 states have internal predecessors, (51), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 05:02:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 117 transitions. [2022-03-20 05:02:49,417 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 117 transitions. Word has length 36 [2022-03-20 05:02:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:02:49,417 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 117 transitions. [2022-03-20 05:02:49,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:02:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 117 transitions. [2022-03-20 05:02:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 05:02:49,419 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:02:49,422 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:02:49,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 05:02:49,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:02:49,626 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:02:49,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:02:49,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1303539417, now seen corresponding path program 1 times [2022-03-20 05:02:49,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:02:49,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417210565] [2022-03-20 05:02:49,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:02:49,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:02:49,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:02:49,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59635959] [2022-03-20 05:02:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:02:49,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:02:49,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:02:49,642 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:02:49,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 05:02:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:02:49,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 05:02:49,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:02:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 05:02:49,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:02:49,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:02:49,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417210565] [2022-03-20 05:02:49,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:02:49,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59635959] [2022-03-20 05:02:49,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59635959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:02:49,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:02:49,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:02:49,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085658483] [2022-03-20 05:02:49,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:02:49,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:02:49,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:02:49,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:02:49,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:02:49,865 INFO L87 Difference]: Start difference. First operand 88 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 05:02:51,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 05:02:52,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:02:52,395 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2022-03-20 05:02:52,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:02:52,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-20 05:02:52,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:02:52,397 INFO L225 Difference]: With dead ends: 100 [2022-03-20 05:02:52,397 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 05:02:52,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:02:52,398 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 05:02:52,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 151 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 05:02:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 05:02:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-20 05:02:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 26 states have call successors, (26), 8 states have call predecessors, (26), 7 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 05:02:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2022-03-20 05:02:52,404 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 60 [2022-03-20 05:02:52,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:02:52,404 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2022-03-20 05:02:52,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 05:02:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2022-03-20 05:02:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 05:02:52,405 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:02:52,405 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:02:52,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 05:02:52,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:02:52,623 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:02:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:02:52,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-03-20 05:02:52,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:02:52,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093524344] [2022-03-20 05:02:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:02:52,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:02:52,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:02:52,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297041783] [2022-03-20 05:02:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:02:52,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:02:52,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:02:52,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:02:52,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process