/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:47:44,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:47:44,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:47:44,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:47:45,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:47:45,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:47:45,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:47:45,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:47:45,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:47:45,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:47:45,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:47:45,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:47:45,031 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:47:45,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:47:45,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:47:45,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:47:45,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:47:45,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:47:45,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:47:45,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:47:45,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:47:45,050 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:47:45,079 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:47:45,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:47:45,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:47:45,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:47:45,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:47:45,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:47:45,082 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:47:45,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:47:45,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:47:45,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:47:45,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:47:45,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:47:45,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:47:45,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:47:45,083 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:47:45,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:47:45,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:47:45,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:47:45,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:47:45,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:47:45,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:47:45,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:47:45,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:47:45,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:47:45,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:47:45,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:47:45,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:47:45,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:47:45,086 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:47:45,086 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:47:45,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:47:45,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:47:45,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:47:45,294 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:47:45,295 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:47:45,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-03-20 08:47:45,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91790dac4/89617f7cc1a84ab4b03463f6db07f33b/FLAGc596eec77 [2022-03-20 08:47:45,705 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:47:45,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-03-20 08:47:45,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91790dac4/89617f7cc1a84ab4b03463f6db07f33b/FLAGc596eec77 [2022-03-20 08:47:45,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91790dac4/89617f7cc1a84ab4b03463f6db07f33b [2022-03-20 08:47:45,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:47:45,723 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:47:45,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:47:45,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:47:45,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:47:45,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:47:45" (1/1) ... [2022-03-20 08:47:45,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@485691b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:45, skipping insertion in model container [2022-03-20 08:47:45,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:47:45" (1/1) ... [2022-03-20 08:47:45,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:47:45,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:47:45,879 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2022-03-20 08:47:45,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:47:45,903 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:47:45,913 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2022-03-20 08:47:45,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:47:45,927 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:47:45,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:45 WrapperNode [2022-03-20 08:47:45,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:47:45,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:47:45,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:47:45,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:47:45,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:45" (1/1) ... [2022-03-20 08:47:45,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:45" (1/1) ... [2022-03-20 08:47:45,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:45" (1/1) ... [2022-03-20 08:47:45,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:45" (1/1) ... [2022-03-20 08:47:45,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:45" (1/1) ... [2022-03-20 08:47:45,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:45" (1/1) ... [2022-03-20 08:47:45,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:45" (1/1) ... [2022-03-20 08:47:45,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:47:45,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:47:45,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:47:45,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:47:45,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:45" (1/1) ... [2022-03-20 08:47:45,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:47:45,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:45,984 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 08:47:45,991 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 08:47:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:47:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:47:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:47:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:47:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:47:46,011 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:47:46,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 08:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:47:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:47:46,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:47:46,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:47:46,062 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:47:46,063 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:47:46,174 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:47:46,178 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:47:46,179 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-20 08:47:46,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:47:46 BoogieIcfgContainer [2022-03-20 08:47:46,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:47:46,196 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:47:46,196 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:47:46,197 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:47:46,199 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:47:46" (1/1) ... [2022-03-20 08:47:46,201 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:47:47,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:47:47 BasicIcfg [2022-03-20 08:47:47,606 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:47:47,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:47:47,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:47:47,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:47:47,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:47:45" (1/4) ... [2022-03-20 08:47:47,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128b324f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:47:47, skipping insertion in model container [2022-03-20 08:47:47,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:45" (2/4) ... [2022-03-20 08:47:47,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128b324f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:47:47, skipping insertion in model container [2022-03-20 08:47:47,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:47:46" (3/4) ... [2022-03-20 08:47:47,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128b324f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:47:47, skipping insertion in model container [2022-03-20 08:47:47,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:47:47" (4/4) ... [2022-03-20 08:47:47,615 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de52.cqvasr [2022-03-20 08:47:47,623 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:47:47,624 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:47:47,663 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:47:47,668 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 08:47:47,669 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:47:47,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:47:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 08:47:47,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:47,683 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:47,683 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:47,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:47,687 INFO L85 PathProgramCache]: Analyzing trace with hash 702671213, now seen corresponding path program 1 times [2022-03-20 08:47:47,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:47,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018955057] [2022-03-20 08:47:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:47,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:47,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:47,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:47,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018955057] [2022-03-20 08:47:47,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018955057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:47:47,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:47:47,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:47:47,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849027851] [2022-03-20 08:47:47,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:47:47,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:47:47,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:47,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:47:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:47:47,902 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:47,941 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2022-03-20 08:47:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:47:47,943 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 08:47:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:47,947 INFO L225 Difference]: With dead ends: 41 [2022-03-20 08:47:47,948 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 08:47:47,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:47:47,954 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:47,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 25 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:47:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 08:47:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 08:47:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-03-20 08:47:47,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 16 [2022-03-20 08:47:47,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:47,983 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-03-20 08:47:47,984 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:47,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-03-20 08:47:47,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 08:47:47,985 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:47,985 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:47,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:47:47,986 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1128942900, now seen corresponding path program 1 times [2022-03-20 08:47:47,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:47,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064102546] [2022-03-20 08:47:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:47,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:48,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:48,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064102546] [2022-03-20 08:47:48,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064102546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:47:48,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:47:48,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:47:48,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041579346] [2022-03-20 08:47:48,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:47:48,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:47:48,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:48,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:47:48,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:47:48,088 INFO L87 Difference]: Start difference. First operand 17 states and 21 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:48,166 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-03-20 08:47:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:47:48,166 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 08:47:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:48,167 INFO L225 Difference]: With dead ends: 28 [2022-03-20 08:47:48,167 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 08:47:48,167 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 08:47:48,169 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:48,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:47:48,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 08:47:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-03-20 08:47:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-03-20 08:47:48,178 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 16 [2022-03-20 08:47:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:48,182 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-03-20 08:47:48,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-03-20 08:47:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 08:47:48,183 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:48,183 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:48,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:47:48,183 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:48,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:48,184 INFO L85 PathProgramCache]: Analyzing trace with hash -610770875, now seen corresponding path program 1 times [2022-03-20 08:47:48,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:48,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061954541] [2022-03-20 08:47:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:48,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:48,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:48,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:48,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061954541] [2022-03-20 08:47:48,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061954541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:48,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407334221] [2022-03-20 08:47:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:48,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:48,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:48,333 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 08:47:48,361 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 08:47:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:48,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 08:47:48,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:47:48,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:47:48,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407334221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:47:48,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:47:48,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-03-20 08:47:48,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583070164] [2022-03-20 08:47:48,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:47:48,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:47:48,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:48,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:47:48,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:47:48,597 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:48,672 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-03-20 08:47:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:47:48,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 08:47:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:48,673 INFO L225 Difference]: With dead ends: 34 [2022-03-20 08:47:48,673 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 08:47:48,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:47:48,675 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:48,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 54 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:47:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 08:47:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-03-20 08:47:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-03-20 08:47:48,679 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 17 [2022-03-20 08:47:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:48,680 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-03-20 08:47:48,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-03-20 08:47:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 08:47:48,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:48,681 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:48,712 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 08:47:48,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:48,909 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:48,910 INFO L85 PathProgramCache]: Analyzing trace with hash 162216202, now seen corresponding path program 1 times [2022-03-20 08:47:48,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:48,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139261392] [2022-03-20 08:47:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:48,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:49,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:49,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139261392] [2022-03-20 08:47:49,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139261392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:49,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771650348] [2022-03-20 08:47:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:49,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:49,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:49,060 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 08:47:49,086 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 08:47:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:49,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 08:47:49,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:49,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:47:51,833 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_mod_v_main_~y~0_20_31 Int)) (or (<= aux_mod_v_main_~y~0_20_31 0) (<= 4294967296 aux_mod_v_main_~y~0_20_31) (< 0 (mod (+ (* 4294967295 aux_mod_v_main_~y~0_20_31) c_main_~x~0 c_main_~y~0) 4294967296)))) is different from false [2022-03-20 08:47:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-03-20 08:47:52,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771650348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:47:52,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:47:52,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 14 [2022-03-20 08:47:52,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849887851] [2022-03-20 08:47:52,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:47:52,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 08:47:52,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 08:47:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=120, Unknown=1, NotChecked=22, Total=182 [2022-03-20 08:47:52,632 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:52,990 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2022-03-20 08:47:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 08:47:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 08:47:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:52,992 INFO L225 Difference]: With dead ends: 40 [2022-03-20 08:47:52,992 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 08:47:52,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=94, Invalid=289, Unknown=1, NotChecked=36, Total=420 [2022-03-20 08:47:52,995 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:52,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 49 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 121 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2022-03-20 08:47:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 08:47:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-03-20 08:47:53,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:53,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-03-20 08:47:53,003 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 17 [2022-03-20 08:47:53,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:53,003 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-03-20 08:47:53,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-03-20 08:47:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 08:47:53,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:53,004 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:53,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 08:47:53,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 08:47:53,224 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:53,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash 760455623, now seen corresponding path program 1 times [2022-03-20 08:47:53,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:53,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808427245] [2022-03-20 08:47:53,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:53,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:53,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:53,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:53,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808427245] [2022-03-20 08:47:53,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808427245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:53,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053804574] [2022-03-20 08:47:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:53,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:53,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:53,522 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 08:47:53,524 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 08:47:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:53,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 08:47:53,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:47:54,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:47:56,457 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~y~0_25 Int)) (let ((.cse0 (* v_main_~y~0_25 4294967295))) (or (<= (div (+ (* v_main_~y~0_25 (- 4294967295)) (* (- 1) c_main_~z~0)) (- 4294967296)) (div (+ .cse0 c_main_~z~0) 4294967296)) (< 0 (mod (+ .cse0 c_main_~x~0 c_main_~y~0) 4294967296))))) is different from false [2022-03-20 08:47:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-03-20 08:47:56,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053804574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:47:56,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:47:56,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 21 [2022-03-20 08:47:56,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054977422] [2022-03-20 08:47:56,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:47:56,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 08:47:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 08:47:56,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=305, Unknown=1, NotChecked=36, Total=420 [2022-03-20 08:47:56,556 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 21 states, 20 states have (on average 1.65) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:48:06,836 WARN L232 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 35 DAG size of output: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:48:08,928 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (not (< 0 (mod c_main_~x~0 4294967296))) (= c_main_~y~0 c_main_~z~0) (forall ((v_main_~y~0_25 Int)) (let ((.cse0 (* v_main_~y~0_25 4294967295))) (or (<= (div (+ (* v_main_~y~0_25 (- 4294967295)) (* (- 1) c_main_~z~0)) (- 4294967296)) (div (+ .cse0 c_main_~z~0) 4294967296)) (< 0 (mod (+ .cse0 c_main_~x~0 c_main_~y~0) 4294967296))))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-20 08:48:11,028 WARN L833 $PredicateComparison]: unable to prove that (and (not (< 0 (mod c_main_~x~0 4294967296))) (= c_main_~y~0 c_main_~z~0) (forall ((v_main_~y~0_25 Int)) (let ((.cse0 (* v_main_~y~0_25 4294967295))) (or (<= (div (+ (* v_main_~y~0_25 (- 4294967295)) (* (- 1) c_main_~z~0)) (- 4294967296)) (div (+ .cse0 c_main_~z~0) 4294967296)) (< 0 (mod (+ .cse0 c_main_~x~0 c_main_~y~0) 4294967296)))))) is different from false [2022-03-20 08:48:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:48:12,125 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2022-03-20 08:48:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 08:48:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 08:48:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:48:12,127 INFO L225 Difference]: With dead ends: 51 [2022-03-20 08:48:12,127 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 08:48:12,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=280, Invalid=1059, Unknown=5, NotChecked=216, Total=1560 [2022-03-20 08:48:12,129 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:48:12,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 78 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 258 Invalid, 0 Unknown, 42 Unchecked, 0.5s Time] [2022-03-20 08:48:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 08:48:12,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-03-20 08:48:12,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:48:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-03-20 08:48:12,135 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 18 [2022-03-20 08:48:12,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:48:12,135 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-03-20 08:48:12,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:48:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-03-20 08:48:12,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 08:48:12,136 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:48:12,136 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:48:12,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 08:48:12,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:48:12,356 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:48:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:48:12,357 INFO L85 PathProgramCache]: Analyzing trace with hash -211948756, now seen corresponding path program 1 times [2022-03-20 08:48:12,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:48:12,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062359615] [2022-03-20 08:48:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:48:12,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:48:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:48:12,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:48:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:48:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:48:12,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:48:12,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062359615] [2022-03-20 08:48:12,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062359615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:48:12,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493993213] [2022-03-20 08:48:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:48:12,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:48:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:48:12,597 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 08:48:12,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:48:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:48:12,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 08:48:12,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:48:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:48:12,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:48:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:48:15,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493993213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:48:15,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:48:15,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11] total 21 [2022-03-20 08:48:15,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249578806] [2022-03-20 08:48:15,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:48:15,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 08:48:15,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:48:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 08:48:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-03-20 08:48:15,316 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:48:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:48:15,984 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2022-03-20 08:48:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 08:48:15,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 08:48:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:48:15,985 INFO L225 Difference]: With dead ends: 41 [2022-03-20 08:48:15,986 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 08:48:15,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 08:48:15,987 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:48:15,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 59 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 08:48:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 08:48:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-03-20 08:48:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:48:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-03-20 08:48:15,993 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 18 [2022-03-20 08:48:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:48:15,993 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-03-20 08:48:15,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:48:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-03-20 08:48:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 08:48:15,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:48:15,994 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:48:16,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:48:16,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:48:16,195 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:48:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:48:16,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2046243813, now seen corresponding path program 1 times [2022-03-20 08:48:16,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:48:16,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75273520] [2022-03-20 08:48:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:48:16,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:48:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:48:16,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:48:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:48:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:48:16,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:48:16,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75273520] [2022-03-20 08:48:16,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75273520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:48:16,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978402091] [2022-03-20 08:48:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:48:16,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:48:16,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:48:16,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:48:16,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:48:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:48:16,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 08:48:16,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:48:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:48:17,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:48:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:48:58,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978402091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:48:58,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:48:58,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2022-03-20 08:48:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550139634] [2022-03-20 08:48:58,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:48:58,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 08:48:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:48:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 08:48:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=544, Unknown=11, NotChecked=0, Total=702 [2022-03-20 08:48:58,723 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:49:44,676 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2022-03-20 08:49:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 08:49:44,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 08:49:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:49:44,678 INFO L225 Difference]: With dead ends: 58 [2022-03-20 08:49:44,678 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 08:49:44,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 87.1s TimeCoverageRelationStatistics Valid=402, Invalid=1643, Unknown=25, NotChecked=0, Total=2070 [2022-03-20 08:49:44,680 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:49:44,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 64 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 146 Invalid, 0 Unknown, 189 Unchecked, 0.5s Time] [2022-03-20 08:49:44,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 08:49:44,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2022-03-20 08:49:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 57 transitions. [2022-03-20 08:49:44,688 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 57 transitions. Word has length 19 [2022-03-20 08:49:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:49:44,688 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 57 transitions. [2022-03-20 08:49:44,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 57 transitions. [2022-03-20 08:49:44,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 08:49:44,689 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:49:44,689 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:49:44,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:49:44,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:44,894 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:49:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:49:44,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1120179281, now seen corresponding path program 1 times [2022-03-20 08:49:44,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:49:44,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967726630] [2022-03-20 08:49:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:44,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:49:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:45,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:49:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:49:45,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:49:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967726630] [2022-03-20 08:49:45,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967726630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:49:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477186503] [2022-03-20 08:49:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:45,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:45,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:49:45,208 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:49:45,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 08:49:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:45,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 08:49:45,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:49:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:49:45,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:49:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:49:52,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477186503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:49:52,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:49:52,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2022-03-20 08:49:52,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846799783] [2022-03-20 08:49:52,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:49:52,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 08:49:52,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:49:52,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 08:49:52,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:49:52,537 INFO L87 Difference]: Start difference. First operand 40 states and 57 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:49:53,386 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2022-03-20 08:49:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 08:49:53,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 08:49:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:49:53,388 INFO L225 Difference]: With dead ends: 49 [2022-03-20 08:49:53,388 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 08:49:53,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-20 08:49:53,389 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:49:53,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 56 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 08:49:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 08:49:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2022-03-20 08:49:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2022-03-20 08:49:53,396 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 19 [2022-03-20 08:49:53,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:49:53,396 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 54 transitions. [2022-03-20 08:49:53,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:49:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 54 transitions. [2022-03-20 08:49:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 08:49:53,397 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:49:53,397 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:49:53,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 08:49:53,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:53,610 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:49:53,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:49:53,610 INFO L85 PathProgramCache]: Analyzing trace with hash 845170693, now seen corresponding path program 1 times [2022-03-20 08:49:53,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:49:53,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127305451] [2022-03-20 08:49:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:53,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:49:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:53,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:49:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:49:53,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:49:53,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127305451] [2022-03-20 08:49:53,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127305451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:49:53,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084550308] [2022-03-20 08:49:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:49:53,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:49:53,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:49:53,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:49:53,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 08:49:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:49:53,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 08:49:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:49:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:49:57,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:50:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:50:02,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084550308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:50:02,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:50:02,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-20 08:50:02,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358643658] [2022-03-20 08:50:02,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:50:02,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 08:50:02,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:50:02,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 08:50:02,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-20 08:50:02,452 INFO L87 Difference]: Start difference. First operand 38 states and 54 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:50:05,346 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 08:50:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:50:06,316 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2022-03-20 08:50:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 08:50:06,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 08:50:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:50:06,318 INFO L225 Difference]: With dead ends: 52 [2022-03-20 08:50:06,318 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 08:50:06,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 08:50:06,319 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 88 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 08:50:06,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 57 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 189 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 08:50:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 08:50:06,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-03-20 08:50:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:50:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 56 transitions. [2022-03-20 08:50:06,327 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 56 transitions. Word has length 19 [2022-03-20 08:50:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:50:06,327 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 56 transitions. [2022-03-20 08:50:06,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:50:06,328 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 56 transitions. [2022-03-20 08:50:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 08:50:06,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:50:06,328 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:50:06,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 08:50:06,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:50:06,549 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:50:06,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:50:06,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1618157770, now seen corresponding path program 1 times [2022-03-20 08:50:06,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:50:06,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660158471] [2022-03-20 08:50:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:50:06,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:50:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:50:07,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:50:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:50:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:50:07,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:50:07,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660158471] [2022-03-20 08:50:07,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660158471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:50:07,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188925619] [2022-03-20 08:50:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:50:07,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:50:07,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:50:07,054 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:50:07,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 08:50:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:50:07,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 08:50:07,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:50:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:50:07,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:50:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:50:14,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188925619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:50:14,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:50:14,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 22 [2022-03-20 08:50:14,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141264297] [2022-03-20 08:50:14,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:50:14,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 08:50:14,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:50:14,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 08:50:14,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=375, Unknown=2, NotChecked=0, Total=462 [2022-03-20 08:50:14,003 INFO L87 Difference]: Start difference. First operand 40 states and 56 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:50:27,301 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 08:50:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:50:27,770 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2022-03-20 08:50:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 08:50:27,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 08:50:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:50:27,772 INFO L225 Difference]: With dead ends: 62 [2022-03-20 08:50:27,772 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 08:50:27,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=277, Invalid=1124, Unknown=5, NotChecked=0, Total=1406 [2022-03-20 08:50:27,773 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:50:27,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 92 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 252 Invalid, 1 Unknown, 104 Unchecked, 3.0s Time] [2022-03-20 08:50:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 08:50:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2022-03-20 08:50:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.525) internal successors, (61), 40 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:50:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2022-03-20 08:50:27,782 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 19 [2022-03-20 08:50:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:50:27,782 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2022-03-20 08:50:27,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:50:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2022-03-20 08:50:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 08:50:27,783 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:50:27,783 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:50:27,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 08:50:27,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 08:50:27,988 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:50:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:50:27,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1349996025, now seen corresponding path program 1 times [2022-03-20 08:50:27,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:50:27,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049316827] [2022-03-20 08:50:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:50:27,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:50:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:50:28,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:50:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:50:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:50:28,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:50:28,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049316827] [2022-03-20 08:50:28,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049316827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:50:28,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258396603] [2022-03-20 08:50:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:50:28,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:50:28,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:50:28,804 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:50:28,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 08:50:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:50:30,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 08:50:30,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:50:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:50:41,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:50:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:50:49,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258396603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:50:49,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:50:49,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 33 [2022-03-20 08:50:49,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333419036] [2022-03-20 08:50:49,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:50:49,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 08:50:49,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:50:49,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 08:50:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=892, Unknown=3, NotChecked=0, Total=1056 [2022-03-20 08:50:49,504 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:51:07,271 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 08:51:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:51:11,443 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-03-20 08:51:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 08:51:11,443 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.21875) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-20 08:51:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:51:11,444 INFO L225 Difference]: With dead ends: 75 [2022-03-20 08:51:11,444 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 08:51:11,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=548, Invalid=2640, Unknown=4, NotChecked=0, Total=3192 [2022-03-20 08:51:11,445 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 106 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:51:11,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 114 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 272 Invalid, 1 Unknown, 220 Unchecked, 4.1s Time] [2022-03-20 08:51:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 08:51:11,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2022-03-20 08:51:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:51:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-03-20 08:51:11,454 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 20 [2022-03-20 08:51:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:51:11,454 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-03-20 08:51:11,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.21875) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:51:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-03-20 08:51:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 08:51:11,455 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:51:11,455 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:51:11,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 08:51:11,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:51:11,655 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:51:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:51:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash 200343749, now seen corresponding path program 2 times [2022-03-20 08:51:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:51:11,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880268070] [2022-03-20 08:51:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:51:11,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:51:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:51:12,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:51:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:51:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:51:12,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:51:12,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880268070] [2022-03-20 08:51:12,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880268070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:51:12,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942652664] [2022-03-20 08:51:12,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:51:12,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:51:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:51:12,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:51:12,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 08:51:12,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:51:12,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:51:12,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 08:51:12,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:51:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:51:17,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:51:28,606 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_mod_v_main_~y~0_53_108 Int) (aux_mod_aux_mod_v_main_~z~0_52_31_48 Int) (aux_div_aux_mod_v_main_~z~0_52_31_48 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_v_main_~z~0_52_31_48 4294967296) aux_mod_aux_mod_v_main_~z~0_52_31_48))) (or (< 0 (mod (+ (* 4294967294 aux_mod_aux_mod_v_main_~z~0_52_31_48) (* 4294967295 aux_mod_v_main_~y~0_53_108) c_main_~x~0 c_main_~y~0 c_main_~z~0 1) 4294967296)) (< .cse0 1) (< aux_mod_v_main_~y~0_53_108 0) (<= aux_mod_aux_mod_v_main_~z~0_52_31_48 0) (<= 4294967295 aux_mod_v_main_~y~0_53_108) (<= 4294967296 aux_mod_aux_mod_v_main_~z~0_52_31_48) (< 1 .cse0)))) is different from false [2022-03-20 08:51:30,728 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_mod_v_main_~y~0_53_108 Int) (aux_mod_aux_mod_v_main_~z~0_52_31_48 Int) (aux_div_aux_mod_v_main_~z~0_52_31_48 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_v_main_~z~0_52_31_48 4294967296) aux_mod_aux_mod_v_main_~z~0_52_31_48))) (or (< .cse0 1) (< aux_mod_v_main_~y~0_53_108 0) (<= aux_mod_aux_mod_v_main_~z~0_52_31_48 0) (<= 4294967295 aux_mod_v_main_~y~0_53_108) (< 0 (mod (+ (* 2 c_main_~y~0) (* 4294967294 aux_mod_aux_mod_v_main_~z~0_52_31_48) (* 4294967295 aux_mod_v_main_~y~0_53_108) c_main_~x~0 1) 4294967296)) (<= 4294967296 aux_mod_aux_mod_v_main_~z~0_52_31_48) (< 1 .cse0)))) is different from false [2022-03-20 08:51:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2022-03-20 08:51:41,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942652664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:51:41,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:51:41,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2022-03-20 08:51:41,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520443155] [2022-03-20 08:51:41,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:51:41,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 08:51:41,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:51:41,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 08:51:41,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=465, Unknown=6, NotChecked=94, Total=702 [2022-03-20 08:51:41,404 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:51:51,880 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 08:51:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:51:52,311 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2022-03-20 08:51:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 08:51:52,312 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 08:51:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:51:52,313 INFO L225 Difference]: With dead ends: 65 [2022-03-20 08:51:52,313 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 08:51:52,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=314, Invalid=1167, Unknown=9, NotChecked=150, Total=1640 [2022-03-20 08:51:52,314 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 08:51:52,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 66 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 148 Invalid, 1 Unknown, 99 Unchecked, 2.7s Time] [2022-03-20 08:51:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 08:51:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2022-03-20 08:51:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:51:52,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-03-20 08:51:52,322 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 21 [2022-03-20 08:51:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:51:52,323 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-03-20 08:51:52,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:51:52,323 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-03-20 08:51:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 08:51:52,324 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:51:52,324 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:51:52,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 08:51:52,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 08:51:52,529 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:51:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:51:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1795621851, now seen corresponding path program 3 times [2022-03-20 08:51:52,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:51:52,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146126364] [2022-03-20 08:51:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:51:52,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:51:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:51:53,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:51:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:51:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:51:53,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:51:53,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146126364] [2022-03-20 08:51:53,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146126364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:51:53,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024855506] [2022-03-20 08:51:53,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:51:53,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:51:53,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:51:53,079 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:51:53,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 08:51:53,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 08:51:53,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:51:53,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 08:51:53,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:52:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:52:02,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:52:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:52:04,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024855506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:52:04,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:52:04,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 28 [2022-03-20 08:52:04,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983789455] [2022-03-20 08:52:04,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:52:04,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 08:52:04,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:04,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 08:52:04,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=599, Unknown=3, NotChecked=0, Total=756 [2022-03-20 08:52:04,364 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 28 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:52:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:17,019 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2022-03-20 08:52:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 08:52:17,019 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 08:52:17,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:17,020 INFO L225 Difference]: With dead ends: 67 [2022-03-20 08:52:17,020 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 08:52:17,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=392, Invalid=1492, Unknown=8, NotChecked=0, Total=1892 [2022-03-20 08:52:17,021 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 08:52:17,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 73 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 174 Invalid, 0 Unknown, 80 Unchecked, 0.9s Time] [2022-03-20 08:52:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 08:52:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2022-03-20 08:52:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:52:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 70 transitions. [2022-03-20 08:52:17,029 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 70 transitions. Word has length 21 [2022-03-20 08:52:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:17,030 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 70 transitions. [2022-03-20 08:52:17,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:52:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 70 transitions. [2022-03-20 08:52:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 08:52:17,030 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:17,031 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:17,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 08:52:17,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 08:52:17,237 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1942841381, now seen corresponding path program 4 times [2022-03-20 08:52:17,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:17,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371470241] [2022-03-20 08:52:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:17,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:18,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:52:18,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:18,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371470241] [2022-03-20 08:52:18,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371470241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:52:18,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276311299] [2022-03-20 08:52:18,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:52:18,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:52:18,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:52:18,050 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:52:18,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 08:52:18,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:52:18,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:52:18,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 08:52:18,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:52:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:52:21,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:53:06,156 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_div_main_~x~0_151 Int) (aux_div_aux_mod_v_main_~y~0_67_55_93 Int) (aux_mod_aux_mod_aux_mod_v_main_~y~0_67_55_93_232 Int) (aux_mod_v_main_~z~0_66_31 Int) (aux_div_v_main_~z~0_66_31 Int) (aux_div_aux_mod_aux_mod_v_main_~y~0_67_55_93_232 Int) (aux_div_v_main_~y~0_67_55 Int) (aux_div_aux_mod_main_~x~0_151_148 Int)) (let ((.cse6 (* aux_div_main_~x~0_151 4294967296)) (.cse4 (* aux_div_aux_mod_main_~x~0_151_148 4294967296)) (.cse1 (* aux_div_aux_mod_aux_mod_v_main_~y~0_67_55_93_232 4294967296)) (.cse7 (* 18446744065119617024 aux_div_v_main_~z~0_66_31)) (.cse5 (* aux_div_aux_mod_v_main_~y~0_67_55_93 4294967296)) (.cse2 (* aux_mod_v_main_~z~0_66_31 2)) (.cse0 (* aux_div_v_main_~y~0_67_55 4294967296)) (.cse3 (* 4294967294 c_main_~y~0))) (or (< aux_mod_v_main_~z~0_66_31 0) (<= (+ aux_mod_aux_mod_aux_mod_v_main_~y~0_67_55_93_232 8589934592 .cse0) .cse1) (< (+ aux_mod_aux_mod_aux_mod_v_main_~y~0_67_55_93_232 .cse2 .cse3) .cse4) (<= (+ .cse5 (* aux_mod_aux_mod_aux_mod_v_main_~y~0_67_55_93_232 4294967296) .cse0 8589934591) (+ .cse6 .cse1 .cse7)) (<= aux_div_aux_mod_aux_mod_v_main_~y~0_67_55_93_232 (+ aux_div_v_main_~y~0_67_55 1)) (<= (+ .cse6 .cse4 .cse1 .cse7) (+ 4294967295 .cse5 .cse2 .cse0 (* aux_mod_aux_mod_aux_mod_v_main_~y~0_67_55_93_232 4294967297) .cse3)) (<= 4294967296 aux_mod_aux_mod_aux_mod_v_main_~y~0_67_55_93_232) (< 0 aux_mod_v_main_~z~0_66_31)))) is different from false [2022-03-20 08:53:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:53:06,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276311299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:53:06,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:53:06,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 28 [2022-03-20 08:53:06,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809215276] [2022-03-20 08:53:06,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:53:06,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 08:53:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:53:06,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 08:53:06,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=545, Unknown=14, NotChecked=50, Total=756 [2022-03-20 08:53:06,196 INFO L87 Difference]: Start difference. First operand 49 states and 70 transitions. Second operand has 28 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:53:11,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:53:11,728 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-03-20 08:53:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 08:53:11,729 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 08:53:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:53:11,729 INFO L225 Difference]: With dead ends: 68 [2022-03-20 08:53:11,730 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 08:53:11,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=341, Invalid=1289, Unknown=14, NotChecked=78, Total=1722 [2022-03-20 08:53:11,731 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:53:11,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 82 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 171 Invalid, 0 Unknown, 119 Unchecked, 1.0s Time] [2022-03-20 08:53:11,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 08:53:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-03-20 08:53:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:53:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-03-20 08:53:11,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 21 [2022-03-20 08:53:11,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:53:11,737 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-03-20 08:53:11,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:53:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-03-20 08:53:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 08:53:11,738 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:53:11,738 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:53:11,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 08:53:11,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 08:53:11,943 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:53:11,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:53:11,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1819739242, now seen corresponding path program 2 times [2022-03-20 08:53:11,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:53:11,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715601600] [2022-03-20 08:53:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:53:11,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:53:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:53:12,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:53:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:53:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:53:12,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:53:12,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715601600] [2022-03-20 08:53:12,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715601600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:53:12,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562258451] [2022-03-20 08:53:12,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:53:12,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:53:12,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:53:12,726 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:53:12,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 08:53:12,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:53:12,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:53:12,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 08:53:12,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:53:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:53:22,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:53:51,478 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_mod_v_main_~y~0_71_31 Int) (aux_mod_main_~y~0_26 Int) (aux_mod_v_main_~z~0_73_31 Int)) (or (<= aux_mod_v_main_~y~0_71_31 0) (< 0 (mod (+ (* aux_mod_v_main_~z~0_73_31 4294967295) (* aux_mod_main_~y~0_26 2) c_main_~x~0 (* 4294967295 aux_mod_v_main_~y~0_71_31)) 4294967296)) (< aux_mod_v_main_~z~0_73_31 0) (< aux_mod_main_~y~0_26 0) (<= 4294967296 aux_mod_v_main_~y~0_71_31) (< 0 aux_mod_main_~y~0_26) (< 0 aux_mod_v_main_~z~0_73_31))) is different from false [2022-03-20 08:53:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:53:51,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562258451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:53:51,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:53:51,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-03-20 08:53:51,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959613427] [2022-03-20 08:53:51,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:53:51,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 08:53:51,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:53:51,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 08:53:51,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=449, Unknown=12, NotChecked=44, Total=600 [2022-03-20 08:53:51,510 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:53:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:53:55,378 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 08:53:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 08:53:55,379 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 08:53:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:53:55,379 INFO L225 Difference]: With dead ends: 46 [2022-03-20 08:53:55,379 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 08:53:55,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=243, Invalid=1009, Unknown=12, NotChecked=68, Total=1332 [2022-03-20 08:53:55,380 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:53:55,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 72 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 109 Invalid, 0 Unknown, 72 Unchecked, 0.5s Time] [2022-03-20 08:53:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 08:53:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-03-20 08:53:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:53:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-03-20 08:53:55,386 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2022-03-20 08:53:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:53:55,386 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-03-20 08:53:55,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:53:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-03-20 08:53:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 08:53:55,387 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:53:55,387 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:53:55,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 08:53:55,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 08:53:55,588 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:53:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:53:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash -597227326, now seen corresponding path program 1 times [2022-03-20 08:53:55,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:53:55,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538304473] [2022-03-20 08:53:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:53:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:53:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:53:56,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:53:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:53:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:53:56,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:53:56,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538304473] [2022-03-20 08:53:56,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538304473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:53:56,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267099662] [2022-03-20 08:53:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:53:56,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:53:56,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:53:56,178 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:53:56,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 08:53:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:53:56,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 08:53:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:53:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:53:58,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:53:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 08:53:59,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267099662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:53:59,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:53:59,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 21 [2022-03-20 08:53:59,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374973758] [2022-03-20 08:53:59,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:53:59,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 08:53:59,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:53:59,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 08:53:59,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-03-20 08:53:59,198 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:54:00,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:54:00,941 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 08:54:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 08:54:00,942 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 08:54:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:54:00,942 INFO L225 Difference]: With dead ends: 46 [2022-03-20 08:54:00,942 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 08:54:00,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 08:54:00,943 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 08:54:00,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 57 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 08:54:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 08:54:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-03-20 08:54:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:54:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-20 08:54:00,950 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-03-20 08:54:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:54:00,950 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-20 08:54:00,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:54:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-20 08:54:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 08:54:00,951 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:54:00,951 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:54:00,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 08:54:01,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:54:01,151 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:54:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:54:01,152 INFO L85 PathProgramCache]: Analyzing trace with hash 589004391, now seen corresponding path program 2 times [2022-03-20 08:54:01,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:54:01,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867538710] [2022-03-20 08:54:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:54:01,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:54:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:54:01,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:54:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:54:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:54:01,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:54:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867538710] [2022-03-20 08:54:01,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867538710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:54:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438197896] [2022-03-20 08:54:01,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:54:01,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:54:01,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:54:01,956 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:54:01,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 08:54:02,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:54:02,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:54:02,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 08:54:02,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:54:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:54:08,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:54:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:54:22,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438197896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:54:22,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:54:22,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 29 [2022-03-20 08:54:22,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476678814] [2022-03-20 08:54:22,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:54:22,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 08:54:22,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:54:22,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 08:54:22,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=670, Unknown=4, NotChecked=0, Total=812 [2022-03-20 08:54:22,031 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:54:25,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 08:54:26,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 08:54:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:54:27,684 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-03-20 08:54:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 08:54:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 08:54:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:54:27,685 INFO L225 Difference]: With dead ends: 37 [2022-03-20 08:54:27,685 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 08:54:27,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=268, Invalid=1368, Unknown=4, NotChecked=0, Total=1640 [2022-03-20 08:54:27,686 INFO L913 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:54:27,686 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 75 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 155 Invalid, 0 Unknown, 50 Unchecked, 4.0s Time] [2022-03-20 08:54:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 08:54:27,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 08:54:27,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 08:54:27,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 08:54:27,686 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2022-03-20 08:54:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:54:27,687 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 08:54:27,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:54:27,687 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 08:54:27,687 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 08:54:27,690 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:54:27,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 08:54:27,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 08:54:27,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 08:54:35,212 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 08:54:35,213 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:54:35,213 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:54:35,213 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 08:54:35,213 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 08:54:35,213 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:54:35,213 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:54:35,213 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 12 49) the Hoare annotation is: true [2022-03-20 08:54:35,213 INFO L878 garLoopResultBuilder]: At program point L16-2(lines 16 20) the Hoare annotation is: (or (< 0 (mod (+ main_~x~0 1) 4294967296)) (= main_~y~0 0)) [2022-03-20 08:54:35,213 INFO L882 garLoopResultBuilder]: For program point L16-3(lines 16 20) no Hoare annotation was computed. [2022-03-20 08:54:35,213 INFO L878 garLoopResultBuilder]: At program point L23-2(lines 23 27) the Hoare annotation is: (or (and (= main_~z~0 main_~y~0) (<= (mod main_~x~0 4294967296) 0)) (and (<= (mod (+ main_~z~0 main_~x~0 (* main_~y~0 4294967295)) 4294967296) 0) (<= (+ main_~x~0 (* (div (+ main_~z~0 1) 4294967296) 4294967296)) (+ main_~y~0 (* (div (+ main_~z~0 main_~x~0 (* (- 1) main_~y~0)) 4294967296) 4294967296))))) [2022-03-20 08:54:35,214 INFO L882 garLoopResultBuilder]: For program point L29-1(lines 13 49) no Hoare annotation was computed. [2022-03-20 08:54:35,214 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 13 49) no Hoare annotation was computed. [2022-03-20 08:54:35,214 INFO L882 garLoopResultBuilder]: For program point L41-1(lines 13 49) no Hoare annotation was computed. [2022-03-20 08:54:35,214 INFO L878 garLoopResultBuilder]: At program point L41-2(lines 41 45) the Hoare annotation is: (= (* (div main_~y~0 4294967296) 4294967296) main_~y~0) [2022-03-20 08:54:35,214 INFO L882 garLoopResultBuilder]: For program point L47(line 47) no Hoare annotation was computed. [2022-03-20 08:54:35,214 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 12 49) no Hoare annotation was computed. [2022-03-20 08:54:35,214 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 12 49) no Hoare annotation was computed. [2022-03-20 08:54:35,214 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-03-20 08:54:35,214 INFO L882 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2022-03-20 08:54:35,214 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-03-20 08:54:35,214 INFO L882 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2022-03-20 08:54:35,215 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2022-03-20 08:54:35,215 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2022-03-20 08:54:35,218 INFO L719 BasicCegarLoop]: Path program histogram: [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:54:35,219 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 08:54:35,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:54:35 BasicIcfg [2022-03-20 08:54:35,234 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 08:54:35,235 INFO L158 Benchmark]: Toolchain (without parser) took 409511.94ms. Allocated memory was 188.7MB in the beginning and 233.8MB in the end (delta: 45.1MB). Free memory was 130.3MB in the beginning and 110.2MB in the end (delta: 20.0MB). Peak memory consumption was 65.4MB. Max. memory is 8.0GB. [2022-03-20 08:54:35,235 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 188.7MB. Free memory is still 146.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:54:35,235 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.97ms. Allocated memory was 188.7MB in the beginning and 233.8MB in the end (delta: 45.1MB). Free memory was 130.1MB in the beginning and 203.6MB in the end (delta: -73.5MB). Peak memory consumption was 7.6MB. Max. memory is 8.0GB. [2022-03-20 08:54:35,236 INFO L158 Benchmark]: Boogie Preprocessor took 26.47ms. Allocated memory is still 233.8MB. Free memory was 203.6MB in the beginning and 202.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:54:35,236 INFO L158 Benchmark]: RCFGBuilder took 238.51ms. Allocated memory is still 233.8MB. Free memory was 202.2MB in the beginning and 191.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 08:54:35,236 INFO L158 Benchmark]: IcfgTransformer took 1410.98ms. Allocated memory is still 233.8MB. Free memory was 191.8MB in the beginning and 149.8MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. [2022-03-20 08:54:35,237 INFO L158 Benchmark]: TraceAbstraction took 407626.77ms. Allocated memory is still 233.8MB. Free memory was 149.5MB in the beginning and 110.2MB in the end (delta: 39.2MB). Peak memory consumption was 39.9MB. Max. memory is 8.0GB. [2022-03-20 08:54:35,238 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 188.7MB. Free memory is still 146.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 200.97ms. Allocated memory was 188.7MB in the beginning and 233.8MB in the end (delta: 45.1MB). Free memory was 130.1MB in the beginning and 203.6MB in the end (delta: -73.5MB). Peak memory consumption was 7.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.47ms. Allocated memory is still 233.8MB. Free memory was 203.6MB in the beginning and 202.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 238.51ms. Allocated memory is still 233.8MB. Free memory was 202.2MB in the beginning and 191.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 1410.98ms. Allocated memory is still 233.8MB. Free memory was 191.8MB in the beginning and 149.8MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. * TraceAbstraction took 407626.77ms. Allocated memory is still 233.8MB. Free memory was 149.5MB in the beginning and 110.2MB in the end (delta: 39.2MB). Peak memory consumption was 39.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 407.6s, OverallIterations: 17, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 143.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 7.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 771 SdHoareTripleChecker+Valid, 21.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 770 mSDsluCounter, 1103 SdHoareTripleChecker+Invalid, 20.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 996 IncrementalHoareTripleChecker+Unchecked, 906 mSDsCounter, 796 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2666 IncrementalHoareTripleChecker+Invalid, 4462 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 796 mSolverCounterUnsat, 200 mSDtfsCounter, 2666 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1037 GetRequests, 408 SyntacticMatches, 103 SemanticMatches, 526 ConstructedPredicates, 8 IntricatePredicates, 2 DeprecatedPredicates, 5826 ImplicationChecksByTransitivity, 355.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=13, InterpolantAutomatonStates: 280, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 128 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 25 PreInvPairs, 50 NumberOfFragments, 72 HoareAnnotationTreeSize, 25 FomulaSimplifications, 140 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3240 FormulaSimplificationTreeSizeReductionInter, 7.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 249.1s InterpolantComputationTime, 620 NumberOfCodeBlocks, 620 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 851 ConstructedInterpolants, 57 QuantifiedInterpolants, 8921 SizeOfPredicates, 58 NumberOfNonLiveVariables, 1349 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 46 InterpolantComputations, 3 PerfectInterpolantSequences, 73/212 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 0 < (x + 1) % 4294967296 || y == 0 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (z == y && x % 4294967296 <= 0) || ((z + x + y * 4294967295) % 4294967296 <= 0 && x + (z + 1) / 4294967296 * 4294967296 <= y + (z + x + -1 * y) / 4294967296 * 4294967296) RESULT: Ultimate proved your program to be correct! [2022-03-20 08:54:35,459 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-20 08:54:35,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...