/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/loop-acceleration/array_2-2-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 20:38:54,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 20:38:54,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 20:38:55,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 20:38:55,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 20:38:55,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 20:38:55,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 20:38:55,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 20:38:55,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 20:38:55,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 20:38:55,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 20:38:55,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 20:38:55,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 20:38:55,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 20:38:55,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 20:38:55,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 20:38:55,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 20:38:55,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 20:38:55,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 20:38:55,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 20:38:55,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 20:38:55,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 20:38:55,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 20:38:55,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 20:38:55,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 20:38:55,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 20:38:55,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 20:38:55,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 20:38:55,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 20:38:55,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-02-23 20:38:55,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 20:38:55,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 20:38:55,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 20:38:55,071 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 20:38:55,091 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 20:38:55,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 20:38:55,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 20:38:55,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 20:38:55,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 20:38:55,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 20:38:55,094 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 20:38:55,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 20:38:55,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 20:38:55,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 20:38:55,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 20:38:55,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 20:38:55,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 20:38:55,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 20:38:55,095 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 20:38:55,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 20:38:55,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 20:38:55,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 20:38:55,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 20:38:55,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:38:55,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 20:38:55,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 20:38:55,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 20:38:55,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 20:38:55,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 20:38:55,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 20:38:55,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 20:38:55,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 20:38:55,097 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 20:38:55,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 20:38:55,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 20:38:55,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 20:38:55,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 20:38:55,318 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 20:38:55,335 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 20:38:55,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2022-02-23 20:38:55,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e888351f/b58d4ade8e0e4488ad797923b0a6ed0d/FLAGe2572e554 [2022-02-23 20:38:55,714 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 20:38:55,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2022-02-23 20:38:55,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e888351f/b58d4ade8e0e4488ad797923b0a6ed0d/FLAGe2572e554 [2022-02-23 20:38:55,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e888351f/b58d4ade8e0e4488ad797923b0a6ed0d [2022-02-23 20:38:55,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 20:38:55,737 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 20:38:55,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 20:38:55,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 20:38:55,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 20:38:55,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:38:55" (1/1) ... [2022-02-23 20:38:55,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c07d68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:38:55, skipping insertion in model container [2022-02-23 20:38:55,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 08:38:55" (1/1) ... [2022-02-23 20:38:55,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 20:38:55,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 20:38:55,858 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i[809,822] [2022-02-23 20:38:55,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:38:55,872 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 20:38:55,879 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i[809,822] [2022-02-23 20:38:55,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 20:38:55,891 INFO L208 MainTranslator]: Completed translation [2022-02-23 20:38:55,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:38:55 WrapperNode [2022-02-23 20:38:55,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 20:38:55,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 20:38:55,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 20:38:55,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 20:38:55,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:38:55" (1/1) ... [2022-02-23 20:38:55,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:38:55" (1/1) ... [2022-02-23 20:38:55,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:38:55" (1/1) ... [2022-02-23 20:38:55,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:38:55" (1/1) ... [2022-02-23 20:38:55,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:38:55" (1/1) ... [2022-02-23 20:38:55,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:38:55" (1/1) ... [2022-02-23 20:38:55,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:38:55" (1/1) ... [2022-02-23 20:38:55,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 20:38:55,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 20:38:55,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 20:38:55,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 20:38:55,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:38:55" (1/1) ... [2022-02-23 20:38:55,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 20:38:55,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:38:55,948 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) [2022-02-23 20:38:55,961 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 [2022-02-23 20:38:55,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 20:38:55,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 20:38:55,973 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 20:38:55,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 20:38:55,973 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 20:38:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 20:38:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 20:38:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 20:38:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 20:38:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 20:38:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 20:38:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 20:38:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 20:38:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-23 20:38:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-02-23 20:38:55,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 20:38:55,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 20:38:55,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 20:38:55,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 20:38:55,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 20:38:55,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 20:38:56,036 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 20:38:56,038 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 20:38:56,201 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 20:38:56,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 20:38:56,205 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 20:38:56,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:38:56 BoogieIcfgContainer [2022-02-23 20:38:56,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 20:38:56,208 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 20:38:56,208 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 20:38:56,210 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 20:38:56,212 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:38:56" (1/1) ... [2022-02-23 20:38:56,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:38:56 BasicIcfg [2022-02-23 20:38:56,222 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 20:38:56,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 20:38:56,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 20:38:56,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 20:38:56,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 08:38:55" (1/4) ... [2022-02-23 20:38:56,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584ee589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:38:56, skipping insertion in model container [2022-02-23 20:38:56,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 08:38:55" (2/4) ... [2022-02-23 20:38:56,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584ee589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 08:38:56, skipping insertion in model container [2022-02-23 20:38:56,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 08:38:56" (3/4) ... [2022-02-23 20:38:56,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584ee589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 08:38:56, skipping insertion in model container [2022-02-23 20:38:56,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 08:38:56" (4/4) ... [2022-02-23 20:38:56,231 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.iqvasr [2022-02-23 20:38:56,234 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 20:38:56,235 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 20:38:56,275 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 20:38:56,283 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 20:38:56,283 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 20:38:56,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2022-02-23 20:38:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 20:38:56,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:38:56,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:38:56,304 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:38:56,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:38:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1502470948, now seen corresponding path program 1 times [2022-02-23 20:38:56,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:38:56,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692809304] [2022-02-23 20:38:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:38:56,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:38:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:56,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:38:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:56,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:38:56,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692809304] [2022-02-23 20:38:56,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692809304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:38:56,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:38:56,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 20:38:56,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745479816] [2022-02-23 20:38:56,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:38:56,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 20:38:56,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:38:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 20:38:56,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 20:38:56,518 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-02-23 20:38:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:38:56,553 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-02-23 20:38:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 20:38:56,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-02-23 20:38:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:38:56,558 INFO L225 Difference]: With dead ends: 34 [2022-02-23 20:38:56,559 INFO L226 Difference]: Without dead ends: 14 [2022-02-23 20:38:56,561 INFO L932 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 [2022-02-23 20:38:56,564 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:38:56,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:38:56,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-23 20:38:56,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-23 20:38:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-02-23 20:38:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-02-23 20:38:56,592 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-02-23 20:38:56,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:38:56,593 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-02-23 20:38:56,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-02-23 20:38:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-02-23 20:38:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 20:38:56,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:38:56,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:38:56,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 20:38:56,595 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:38:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:38:56,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1473841797, now seen corresponding path program 1 times [2022-02-23 20:38:56,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:38:56,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474549563] [2022-02-23 20:38:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:38:56,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:38:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:56,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:38:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:56,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:38:56,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474549563] [2022-02-23 20:38:56,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474549563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 20:38:56,682 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 20:38:56,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 20:38:56,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564209680] [2022-02-23 20:38:56,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 20:38:56,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 20:38:56,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:38:56,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 20:38:56,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 20:38:56,687 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-02-23 20:38:56,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:38:56,716 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-02-23 20:38:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 20:38:56,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-02-23 20:38:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:38:56,718 INFO L225 Difference]: With dead ends: 22 [2022-02-23 20:38:56,718 INFO L226 Difference]: Without dead ends: 16 [2022-02-23 20:38:56,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 20:38:56,719 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:38:56,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:38:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-23 20:38:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-02-23 20:38:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2022-02-23 20:38:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-02-23 20:38:56,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-02-23 20:38:56,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:38:56,734 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-02-23 20:38:56,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-02-23 20:38:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-02-23 20:38:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 20:38:56,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:38:56,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:38:56,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 20:38:56,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:38:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:38:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash -805744227, now seen corresponding path program 1 times [2022-02-23 20:38:56,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:38:56,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702042580] [2022-02-23 20:38:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:38:56,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:38:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:56,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:38:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:56,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:38:56,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702042580] [2022-02-23 20:38:56,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702042580] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:38:56,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924437118] [2022-02-23 20:38:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:38:56,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:38:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:38:56,821 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) [2022-02-23 20:38:56,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 20:38:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 20:38:56,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:38:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:56,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:38:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:56,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924437118] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:38:56,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:38:56,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-23 20:38:56,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288586678] [2022-02-23 20:38:56,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:38:56,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 20:38:56,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:38:56,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 20:38:56,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 20:38:56,983 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:38:57,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:38:57,043 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-02-23 20:38:57,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 20:38:57,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-23 20:38:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:38:57,044 INFO L225 Difference]: With dead ends: 27 [2022-02-23 20:38:57,044 INFO L226 Difference]: Without dead ends: 21 [2022-02-23 20:38:57,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-02-23 20:38:57,048 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:38:57,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:38:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-23 20:38:57,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-02-23 20:38:57,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 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) [2022-02-23 20:38:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-02-23 20:38:57,053 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2022-02-23 20:38:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:38:57,053 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-02-23 20:38:57,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:38:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-02-23 20:38:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-23 20:38:57,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:38:57,055 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:38:57,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 20:38:57,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:38:57,272 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:38:57,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:38:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1812339965, now seen corresponding path program 2 times [2022-02-23 20:38:57,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:38:57,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850253721] [2022-02-23 20:38:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:38:57,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:38:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:57,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:38:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:57,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:38:57,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850253721] [2022-02-23 20:38:57,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850253721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:38:57,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637982411] [2022-02-23 20:38:57,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 20:38:57,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:38:57,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:38:57,368 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) [2022-02-23 20:38:57,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 20:38:57,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 20:38:57,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:38:57,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 20:38:57,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:38:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:57,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:38:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:57,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637982411] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:38:57,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:38:57,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-02-23 20:38:57,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902302955] [2022-02-23 20:38:57,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:38:57,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 20:38:57,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:38:57,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 20:38:57,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-02-23 20:38:57,527 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:38:57,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:38:57,647 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-02-23 20:38:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 20:38:57,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-23 20:38:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:38:57,648 INFO L225 Difference]: With dead ends: 39 [2022-02-23 20:38:57,648 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 20:38:57,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-02-23 20:38:57,649 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 20:38:57,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 20:38:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 20:38:57,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-23 20:38:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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) [2022-02-23 20:38:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-02-23 20:38:57,653 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2022-02-23 20:38:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:38:57,653 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-02-23 20:38:57,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:38:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-02-23 20:38:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 20:38:57,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:38:57,654 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:38:57,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-23 20:38:57,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-23 20:38:57,870 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:38:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:38:57,871 INFO L85 PathProgramCache]: Analyzing trace with hash -701958065, now seen corresponding path program 3 times [2022-02-23 20:38:57,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:38:57,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639558084] [2022-02-23 20:38:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:38:57,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:38:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:58,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:38:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:58,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:38:58,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639558084] [2022-02-23 20:38:58,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639558084] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:38:58,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798461422] [2022-02-23 20:38:58,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 20:38:58,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:38:58,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:38:58,028 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) [2022-02-23 20:38:58,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 20:38:58,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-23 20:38:58,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:38:58,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 20:38:58,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:38:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:58,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:38:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:58,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798461422] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:38:58,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:38:58,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-02-23 20:38:58,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330897993] [2022-02-23 20:38:58,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:38:58,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 20:38:58,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:38:58,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 20:38:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-02-23 20:38:58,436 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:38:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:38:58,735 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-02-23 20:38:58,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-23 20:38:58,735 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-23 20:38:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:38:58,737 INFO L225 Difference]: With dead ends: 63 [2022-02-23 20:38:58,737 INFO L226 Difference]: Without dead ends: 57 [2022-02-23 20:38:58,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-02-23 20:38:58,741 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:38:58,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 24 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:38:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-23 20:38:58,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-23 20:38:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 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) [2022-02-23 20:38:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-02-23 20:38:58,756 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2022-02-23 20:38:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:38:58,757 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-02-23 20:38:58,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:38:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-02-23 20:38:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-23 20:38:58,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:38:58,760 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:38:58,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 20:38:58,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:38:58,978 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:38:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:38:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1914531047, now seen corresponding path program 4 times [2022-02-23 20:38:58,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:38:58,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163454159] [2022-02-23 20:38:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:38:58,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:38:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:59,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:38:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:38:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:59,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:38:59,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163454159] [2022-02-23 20:38:59,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163454159] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:38:59,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465575334] [2022-02-23 20:38:59,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 20:38:59,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:38:59,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:38:59,263 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) [2022-02-23 20:38:59,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 20:38:59,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 20:38:59,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:38:59,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-23 20:38:59,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:38:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:38:59,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:39:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:39:00,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465575334] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:39:00,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:39:00,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-02-23 20:39:00,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672751492] [2022-02-23 20:39:00,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:39:00,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-23 20:39:00,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:39:00,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-23 20:39:00,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 20:39:00,171 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:39:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:39:01,098 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2022-02-23 20:39:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-23 20:39:01,098 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-23 20:39:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:39:01,099 INFO L225 Difference]: With dead ends: 111 [2022-02-23 20:39:01,099 INFO L226 Difference]: Without dead ends: 105 [2022-02-23 20:39:01,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-02-23 20:39:01,103 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 20:39:01,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 34 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 20:39:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-23 20:39:01,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-02-23 20:39:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 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) [2022-02-23 20:39:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-02-23 20:39:01,110 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 56 [2022-02-23 20:39:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:39:01,110 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-02-23 20:39:01,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:39:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-02-23 20:39:01,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-23 20:39:01,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:39:01,112 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:39:01,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 20:39:01,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:39:01,321 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:39:01,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:39:01,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1226014231, now seen corresponding path program 5 times [2022-02-23 20:39:01,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:39:01,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877141678] [2022-02-23 20:39:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:39:01,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:39:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:39:02,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:39:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:39:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:39:02,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:39:02,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877141678] [2022-02-23 20:39:02,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877141678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:39:02,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654663775] [2022-02-23 20:39:02,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 20:39:02,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:39:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:39:02,296 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) [2022-02-23 20:39:02,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 20:39:39,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-02-23 20:39:39,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 20:39:39,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-23 20:39:39,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 20:39:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:39:39,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 20:39:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:39:41,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654663775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 20:39:41,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 20:39:41,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-02-23 20:39:41,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425203607] [2022-02-23 20:39:41,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 20:39:41,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-23 20:39:41,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 20:39:41,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-23 20:39:41,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-02-23 20:39:41,517 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:39:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 20:39:44,267 INFO L93 Difference]: Finished difference Result 207 states and 254 transitions. [2022-02-23 20:39:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-23 20:39:44,267 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-02-23 20:39:44,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 20:39:44,270 INFO L225 Difference]: With dead ends: 207 [2022-02-23 20:39:44,270 INFO L226 Difference]: Without dead ends: 201 [2022-02-23 20:39:44,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2022-02-23 20:39:44,278 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 242 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 20:39:44,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 19 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 20:39:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-02-23 20:39:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-02-23 20:39:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 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) [2022-02-23 20:39:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2022-02-23 20:39:44,288 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 104 [2022-02-23 20:39:44,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 20:39:44,288 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2022-02-23 20:39:44,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.020408163265306) internal successors, (198), 97 states have internal predecessors, (198), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 20:39:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2022-02-23 20:39:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-02-23 20:39:44,290 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 20:39:44,290 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 20:39:44,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-23 20:39:44,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:39:44,500 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 20:39:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 20:39:44,501 INFO L85 PathProgramCache]: Analyzing trace with hash 349454455, now seen corresponding path program 6 times [2022-02-23 20:39:44,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 20:39:44,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13766985] [2022-02-23 20:39:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 20:39:44,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 20:39:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:39:47,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 20:39:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 20:39:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 20:39:47,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 20:39:47,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13766985] [2022-02-23 20:39:47,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13766985] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 20:39:47,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216714690] [2022-02-23 20:39:47,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 20:39:47,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 20:39:47,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 20:39:47,217 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) [2022-02-23 20:39:47,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process