/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/nla-digbench-scaling/prodbin-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 11:33:54,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 11:33:54,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 11:33:54,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 11:33:54,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 11:33:54,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 11:33:54,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 11:33:54,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 11:33:54,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 11:33:54,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 11:33:54,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 11:33:54,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 11:33:54,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 11:33:54,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 11:33:54,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 11:33:54,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 11:33:54,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 11:33:54,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 11:33:54,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 11:33:54,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 11:33:54,995 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 11:33:54,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 11:33:54,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 11:33:54,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 11:33:54,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 11:33:55,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 11:33:55,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 11:33:55,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 11:33:55,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 11:33:55,012 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 11:33:55,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 11:33:55,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 11:33:55,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 11:33:55,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 11:33:55,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 11:33:55,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 11:33:55,035 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 11:33:55,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 11:33:55,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 11:33:55,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 11:33:55,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 11:33:55,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 11:33:55,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 11:33:55,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 11:33:55,037 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 11:33:55,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 11:33:55,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 11:33:55,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 11:33:55,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 11:33:55,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:33:55,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 11:33:55,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 11:33:55,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 11:33:55,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 11:33:55,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 11:33:55,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 11:33:55,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 11:33:55,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 11:33:55,039 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 11:33:55,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 11:33:55,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 11:33:55,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 11:33:55,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 11:33:55,246 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 11:33:55,248 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 11:33:55,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound2.c [2022-03-20 11:33:55,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1ac09d74/c0b4bab5c9f54d7cbb7d04c9a37b040d/FLAG9c5e576fb [2022-03-20 11:33:55,653 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 11:33:55,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound2.c [2022-03-20 11:33:55,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1ac09d74/c0b4bab5c9f54d7cbb7d04c9a37b040d/FLAG9c5e576fb [2022-03-20 11:33:55,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1ac09d74/c0b4bab5c9f54d7cbb7d04c9a37b040d [2022-03-20 11:33:55,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 11:33:55,670 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 11:33:55,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 11:33:55,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 11:33:55,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 11:33:55,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:33:55" (1/1) ... [2022-03-20 11:33:55,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a3b11fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:33:55, skipping insertion in model container [2022-03-20 11:33:55,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:33:55" (1/1) ... [2022-03-20 11:33:55,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 11:33:55,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 11:33:55,801 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound2.c[537,550] [2022-03-20 11:33:55,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:33:55,820 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 11:33:55,827 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound2.c[537,550] [2022-03-20 11:33:55,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:33:55,837 INFO L208 MainTranslator]: Completed translation [2022-03-20 11:33:55,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:33:55 WrapperNode [2022-03-20 11:33:55,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 11:33:55,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 11:33:55,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 11:33:55,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 11:33:55,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:33:55" (1/1) ... [2022-03-20 11:33:55,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:33:55" (1/1) ... [2022-03-20 11:33:55,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:33:55" (1/1) ... [2022-03-20 11:33:55,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:33:55" (1/1) ... [2022-03-20 11:33:55,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:33:55" (1/1) ... [2022-03-20 11:33:55,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:33:55" (1/1) ... [2022-03-20 11:33:55,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:33:55" (1/1) ... [2022-03-20 11:33:55,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 11:33:55,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 11:33:55,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 11:33:55,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 11:33:55,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:33:55" (1/1) ... [2022-03-20 11:33:55,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:33:55,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:33:55,887 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 11:33:55,894 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 11:33:55,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 11:33:55,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 11:33:55,913 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 11:33:55,913 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 11:33:55,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 11:33:55,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 11:33:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 11:33:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 11:33:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 11:33:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 11:33:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 11:33:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 11:33:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 11:33:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 11:33:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 11:33:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 11:33:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 11:33:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 11:33:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 11:33:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 11:33:55,956 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 11:33:55,957 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 11:33:56,038 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 11:33:56,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 11:33:56,042 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 11:33:56,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:33:56 BoogieIcfgContainer [2022-03-20 11:33:56,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 11:33:56,043 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 11:33:56,043 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 11:33:56,044 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 11:33:56,046 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:33:56" (1/1) ... [2022-03-20 11:33:56,047 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 11:33:56,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:33:56 BasicIcfg [2022-03-20 11:33:56,057 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 11:33:56,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 11:33:56,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 11:33:56,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 11:33:56,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 11:33:55" (1/4) ... [2022-03-20 11:33:56,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487c128e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:33:56, skipping insertion in model container [2022-03-20 11:33:56,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:33:55" (2/4) ... [2022-03-20 11:33:56,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487c128e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:33:56, skipping insertion in model container [2022-03-20 11:33:56,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:33:56" (3/4) ... [2022-03-20 11:33:56,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487c128e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:33:56, skipping insertion in model container [2022-03-20 11:33:56,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:33:56" (4/4) ... [2022-03-20 11:33:56,062 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound2.cqvasr [2022-03-20 11:33:56,065 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 11:33:56,065 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 11:33:56,092 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 11:33:56,097 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 11:33:56,097 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 11:33:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:33:56,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 11:33:56,111 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:33:56,111 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 11:33:56,112 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:33:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:33:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2022-03-20 11:33:56,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:33:56,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132161574] [2022-03-20 11:33:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:33:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:33:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:33:56,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 11:33:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:33:56,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 11:33:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:33:56,301 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 11:33:56,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:33:56,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132161574] [2022-03-20 11:33:56,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132161574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:33:56,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:33:56,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 11:33:56,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083121412] [2022-03-20 11:33:56,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:33:56,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 11:33:56,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:33:56,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 11:33:56,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 11:33:56,323 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:33:56,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:33:56,375 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-20 11:33:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 11:33:56,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 11:33:56,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:33:56,380 INFO L225 Difference]: With dead ends: 52 [2022-03-20 11:33:56,381 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 11:33:56,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 11:33:56,384 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:33:56,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:33:56,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 11:33:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-20 11:33:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 11:33:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-20 11:33:56,419 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-03-20 11:33:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:33:56,420 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-20 11:33:56,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:33:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-20 11:33:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 11:33:56,420 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:33:56,421 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 11:33:56,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 11:33:56,421 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:33:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:33:56,421 INFO L85 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2022-03-20 11:33:56,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:33:56,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791537502] [2022-03-20 11:33:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:33:56,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:33:56,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:33:56,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999278735] [2022-03-20 11:33:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:33:56,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:33:56,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:33:56,434 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 11:33:56,435 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 11:33:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:33:56,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 11:33:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:33:56,593 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 11:33:56,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:33:56,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:33:56,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791537502] [2022-03-20 11:33:56,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:33:56,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999278735] [2022-03-20 11:33:56,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999278735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:33:56,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:33:56,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 11:33:56,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003363261] [2022-03-20 11:33:56,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:33:56,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 11:33:56,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:33:56,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 11:33:56,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 11:33:56,596 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 11:33:56,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:33:56,615 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-20 11:33:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 11:33:56,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-20 11:33:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:33:56,616 INFO L225 Difference]: With dead ends: 34 [2022-03-20 11:33:56,616 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 11:33:56,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 11:33:56,617 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:33:56,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:33:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 11:33:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 11:33:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 11:33:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 11:33:56,622 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-03-20 11:33:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:33:56,623 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 11:33:56,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 11:33:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 11:33:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 11:33:56,623 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:33:56,624 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 11:33:56,662 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 11:33:56,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:33:56,824 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:33:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:33:56,825 INFO L85 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2022-03-20 11:33:56,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:33:56,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167167850] [2022-03-20 11:33:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:33:56,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:33:56,839 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:33:56,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613245935] [2022-03-20 11:33:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:33:56,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:33:56,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:33:56,842 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 11:33:56,844 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 11:33:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:33:56,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 11:33:56,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:33:56,942 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 11:33:56,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:33:56,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:33:56,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167167850] [2022-03-20 11:33:56,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:33:56,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613245935] [2022-03-20 11:33:56,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613245935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:33:56,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:33:56,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 11:33:56,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421654382] [2022-03-20 11:33:56,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:33:56,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:33:56,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:33:56,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:33:56,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 11:33:56,954 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:33:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:33:56,985 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-03-20 11:33:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:33:56,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 11:33:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:33:56,986 INFO L225 Difference]: With dead ends: 38 [2022-03-20 11:33:56,986 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 11:33:56,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 11:33:56,987 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:33:56,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:33:56,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 11:33:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-03-20 11:33:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 11:33:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-20 11:33:56,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-03-20 11:33:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:33:57,000 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-20 11:33:57,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:33:57,000 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-20 11:33:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 11:33:57,001 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:33:57,001 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:33:57,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 11:33:57,210 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,SelfDestructingSolverStorable2 [2022-03-20 11:33:57,211 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:33:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:33:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2022-03-20 11:33:57,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:33:57,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492019264] [2022-03-20 11:33:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:33:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:33:57,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:33:57,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241824783] [2022-03-20 11:33:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:33:57,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:33:57,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:33:57,228 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 11:33:57,229 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 11:33:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:33:57,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 11:33:57,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:33:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:33:57,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:33:57,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:33:57,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492019264] [2022-03-20 11:33:57,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:33:57,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241824783] [2022-03-20 11:33:57,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241824783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:33:57,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:33:57,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 11:33:57,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757000567] [2022-03-20 11:33:57,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:33:57,322 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 11:33:57,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:33:57,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 11:33:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 11:33:57,323 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 11:33:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:33:57,359 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-20 11:33:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 11:33:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-20 11:33:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:33:57,360 INFO L225 Difference]: With dead ends: 42 [2022-03-20 11:33:57,360 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 11:33:57,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 11:33:57,361 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:33:57,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:33:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 11:33:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-20 11:33:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 11:33:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-20 11:33:57,367 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-03-20 11:33:57,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:33:57,367 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-20 11:33:57,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 11:33:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-20 11:33:57,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 11:33:57,368 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:33:57,368 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:33:57,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 11:33:57,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:33:57,569 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:33:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:33:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2022-03-20 11:33:57,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:33:57,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576318799] [2022-03-20 11:33:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:33:57,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:33:57,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:33:57,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140408188] [2022-03-20 11:33:57,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:33:57,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:33:57,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:33:57,586 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 11:33:57,587 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 11:33:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:33:57,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 11:33:57,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:33:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:33:57,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:33:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:33:57,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:33:57,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576318799] [2022-03-20 11:33:57,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:33:57,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140408188] [2022-03-20 11:33:57,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140408188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:33:57,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:33:57,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-20 11:33:57,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785983202] [2022-03-20 11:33:57,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:33:57,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:33:57,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:33:57,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:33:57,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 11:33:57,761 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 11:33:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:33:57,780 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-03-20 11:33:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 11:33:57,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-03-20 11:33:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:33:57,781 INFO L225 Difference]: With dead ends: 44 [2022-03-20 11:33:57,781 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 11:33:57,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 11:33:57,782 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:33:57,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 82 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:33:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 11:33:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 11:33:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 11:33:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-03-20 11:33:57,786 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2022-03-20 11:33:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:33:57,786 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-03-20 11:33:57,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 11:33:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-03-20 11:33:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 11:33:57,787 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:33:57,787 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:33:57,806 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 11:33:58,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:33:58,004 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:33:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:33:58,004 INFO L85 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2022-03-20 11:33:58,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:33:58,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300745942] [2022-03-20 11:33:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:33:58,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:33:58,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:33:58,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358727769] [2022-03-20 11:33:58,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:33:58,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:33:58,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:33:58,014 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 11:33:58,015 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 11:33:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:33:58,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 11:33:58,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:34:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:34:00,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:34:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:34:12,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:34:12,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300745942] [2022-03-20 11:34:12,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:34:12,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358727769] [2022-03-20 11:34:12,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358727769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:34:12,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:34:12,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-20 11:34:12,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576509160] [2022-03-20 11:34:12,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:34:12,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 11:34:12,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:34:12,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 11:34:12,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=142, Unknown=5, NotChecked=0, Total=182 [2022-03-20 11:34:12,335 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 11:34:14,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 11:34:15,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 11:34:20,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 11:34:23,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 11:34:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:34:25,722 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-03-20 11:34:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 11:34:25,722 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), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 11:34:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:34:25,724 INFO L225 Difference]: With dead ends: 53 [2022-03-20 11:34:25,724 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 11:34:25,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=80, Invalid=335, Unknown=5, NotChecked=0, Total=420 [2022-03-20 11:34:25,725 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-03-20 11:34:25,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 213 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 142 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-03-20 11:34:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 11:34:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-03-20 11:34:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:34:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-03-20 11:34:25,731 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 28 [2022-03-20 11:34:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:34:25,732 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-03-20 11:34:25,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 11:34:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-03-20 11:34:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 11:34:25,733 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:34:25,733 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:34:25,754 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 11:34:25,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:34:25,951 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:34:25,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:34:25,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2022-03-20 11:34:25,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:34:25,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371541756] [2022-03-20 11:34:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:25,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:34:25,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:34:25,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405845923] [2022-03-20 11:34:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:25,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:34:25,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:34:25,969 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 11:34:25,970 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 11:34:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:34:26,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 11:34:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:34:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:34:26,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:34:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:34:27,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:34:27,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371541756] [2022-03-20 11:34:27,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:34:27,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405845923] [2022-03-20 11:34:27,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405845923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:34:27,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:34:27,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-03-20 11:34:27,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771499655] [2022-03-20 11:34:27,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:34:27,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 11:34:27,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:34:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 11:34:27,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-20 11:34:27,406 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 11:34:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:34:28,242 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-03-20 11:34:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 11:34:28,242 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-03-20 11:34:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:34:28,243 INFO L225 Difference]: With dead ends: 75 [2022-03-20 11:34:28,243 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 11:34:28,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-03-20 11:34:28,244 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 11:34:28,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 228 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 11:34:28,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 11:34:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-03-20 11:34:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 51 states have internal predecessors, (59), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 11:34:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-03-20 11:34:28,252 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 28 [2022-03-20 11:34:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:34:28,252 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-03-20 11:34:28,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 11:34:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-03-20 11:34:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 11:34:28,253 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:34:28,254 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:34:28,279 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 11:34:28,456 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:34:28,456 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:34:28,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:34:28,456 INFO L85 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2022-03-20 11:34:28,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:34:28,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044935127] [2022-03-20 11:34:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:28,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:34:28,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:34:28,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362281601] [2022-03-20 11:34:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:28,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:34:28,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:34:28,465 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 11:34:28,465 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 11:34:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:34:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 11:34:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:34:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 11:34:28,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:34:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 11:34:28,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:34:28,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044935127] [2022-03-20 11:34:28,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:34:28,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362281601] [2022-03-20 11:34:28,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362281601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:34:28,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:34:28,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 11:34:28,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972943599] [2022-03-20 11:34:28,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:34:28,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 11:34:28,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:34:28,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 11:34:28,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 11:34:28,697 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 11:34:30,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 11:34:31,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:34:31,306 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-03-20 11:34:31,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 11:34:31,306 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 11:34:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:34:31,308 INFO L225 Difference]: With dead ends: 72 [2022-03-20 11:34:31,308 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 11:34:31,308 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-20 11:34:31,308 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 11:34:31,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 115 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 11:34:31,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 11:34:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 11:34:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.1875) internal successors, (57), 51 states have internal predecessors, (57), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 11:34:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-03-20 11:34:31,314 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 34 [2022-03-20 11:34:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:34:31,314 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-03-20 11:34:31,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 11:34:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-03-20 11:34:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 11:34:31,315 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:34:31,315 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:34:31,333 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 11:34:31,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:34:31,527 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:34:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:34:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash -782932132, now seen corresponding path program 2 times [2022-03-20 11:34:31,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:34:31,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190941852] [2022-03-20 11:34:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:34:31,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:34:31,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:34:31,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560816438] [2022-03-20 11:34:31,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:34:31,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:34:31,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:34:31,539 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 11:34:31,545 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 11:34:31,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:34:31,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 11:34:31,587 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 11:34:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 11:34:31,623 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 11:34:31,623 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 11:34:31,624 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 11:34:31,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 11:34:31,825 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,SelfDestructingSolverStorable8 [2022-03-20 11:34:31,828 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:34:31,829 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 11:34:31,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:34:31 BasicIcfg [2022-03-20 11:34:31,846 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 11:34:31,846 INFO L158 Benchmark]: Toolchain (without parser) took 36176.89ms. Allocated memory was 234.9MB in the beginning and 290.5MB in the end (delta: 55.6MB). Free memory was 184.4MB in the beginning and 124.4MB in the end (delta: 60.0MB). Peak memory consumption was 115.6MB. Max. memory is 8.0GB. [2022-03-20 11:34:31,847 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 234.9MB. Free memory is still 200.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 11:34:31,847 INFO L158 Benchmark]: CACSL2BoogieTranslator took 160.83ms. Allocated memory is still 234.9MB. Free memory was 184.3MB in the beginning and 210.9MB in the end (delta: -26.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 11:34:31,847 INFO L158 Benchmark]: Boogie Preprocessor took 16.32ms. Allocated memory is still 234.9MB. Free memory was 210.9MB in the beginning and 209.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 11:34:31,847 INFO L158 Benchmark]: RCFGBuilder took 188.30ms. Allocated memory is still 234.9MB. Free memory was 209.2MB in the beginning and 199.4MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 11:34:31,847 INFO L158 Benchmark]: IcfgTransformer took 13.55ms. Allocated memory is still 234.9MB. Free memory was 199.4MB in the beginning and 197.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 11:34:31,848 INFO L158 Benchmark]: TraceAbstraction took 35788.18ms. Allocated memory was 234.9MB in the beginning and 290.5MB in the end (delta: 55.6MB). Free memory was 197.3MB in the beginning and 124.4MB in the end (delta: 72.9MB). Peak memory consumption was 129.8MB. Max. memory is 8.0GB. [2022-03-20 11:34:31,848 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 234.9MB. Free memory is still 200.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 160.83ms. Allocated memory is still 234.9MB. Free memory was 184.3MB in the beginning and 210.9MB in the end (delta: -26.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.32ms. Allocated memory is still 234.9MB. Free memory was 210.9MB in the beginning and 209.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 188.30ms. Allocated memory is still 234.9MB. Free memory was 209.2MB in the beginning and 199.4MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 13.55ms. Allocated memory is still 234.9MB. Free memory was 199.4MB in the beginning and 197.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 35788.18ms. Allocated memory was 234.9MB in the beginning and 290.5MB in the end (delta: 55.6MB). Free memory was 197.3MB in the beginning and 124.4MB in the end (delta: 72.9MB). Peak memory consumption was 129.8MB. 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [\old(counter)=11, counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(b >= 1) VAL [\old(counter)=0, a=2, b=7, counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [\old(counter)=0, a=2, b=7, counter=0, x=2, y=7, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, b=7, counter=1, counter++=0, x=2, y=7, z=0] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=2, b=7, counter=1, x=2, y=7, z=0] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=2, b=7, counter=1, x=2, y=7, z=0] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=2, b=7, counter=1, x=2, y=6, z=2] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=2, b=7, counter=1, x=4, y=3, z=2] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, b=7, counter=2, counter++=1, x=4, y=3, z=2] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=2, b=7, counter=2, x=4, y=3, z=2] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=2, b=7, counter=2, x=4, y=3, z=2] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=2, b=7, counter=2, x=4, y=2, z=6] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=2, b=7, counter=2, x=8, y=1, z=6] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, b=7, counter=3, counter++=2, x=8, y=1, z=6] [L33] COND FALSE !(counter++<2) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L13] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L15] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 35.7s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 17.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 149 SdHoareTripleChecker+Valid, 11.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 144 mSDsluCounter, 919 SdHoareTripleChecker+Invalid, 11.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 726 mSDsCounter, 69 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 562 IncrementalHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 69 mSolverCounterUnsat, 193 mSDtfsCounter, 562 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 318 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 17.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=7, InterpolantAutomatonStates: 62, 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, 8 MinimizatonAttempts, 13 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 16.3s InterpolantComputationTime, 233 NumberOfCodeBlocks, 233 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 301 ConstructedInterpolants, 0 QuantifiedInterpolants, 1329 SizeOfPredicates, 21 NumberOfNonLiveVariables, 705 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 35/54 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 RESULT: Ultimate proved your program to be incorrect! [2022-03-20 11:34:31,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...