/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/egcd3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 11:51:16,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 11:51:16,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 11:51:16,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 11:51:16,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 11:51:16,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 11:51:16,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 11:51:16,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 11:51:16,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 11:51:16,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 11:51:16,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 11:51:16,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 11:51:16,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 11:51:16,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 11:51:16,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 11:51:16,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 11:51:16,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 11:51:16,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 11:51:16,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 11:51:16,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 11:51:16,959 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 11:51:16,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 11:51:16,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 11:51:16,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 11:51:16,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 11:51:16,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 11:51:16,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 11:51:16,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 11:51:16,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 11:51:16,983 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 11:51:17,004 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 11:51:17,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 11:51:17,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 11:51:17,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 11:51:17,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 11:51:17,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 11:51:17,005 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 11:51:17,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 11:51:17,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 11:51:17,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 11:51:17,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 11:51:17,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 11:51:17,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 11:51:17,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 11:51:17,008 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 11:51:17,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 11:51:17,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 11:51:17,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 11:51:17,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 11:51:17,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:51:17,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 11:51:17,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 11:51:17,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 11:51:17,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 11:51:17,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 11:51:17,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 11:51:17,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 11:51:17,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 11:51:17,011 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 11:51:17,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 11:51:17,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 11:51:17,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 11:51:17,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 11:51:17,221 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 11:51:17,234 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 11:51:17,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-04-06 11:51:17,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48d4c27f7/ab0d663a17ea4c6083db1d277667a999/FLAGcb56b78bb [2022-04-06 11:51:17,659 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 11:51:17,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2022-04-06 11:51:17,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48d4c27f7/ab0d663a17ea4c6083db1d277667a999/FLAGcb56b78bb [2022-04-06 11:51:17,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48d4c27f7/ab0d663a17ea4c6083db1d277667a999 [2022-04-06 11:51:17,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 11:51:17,674 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 11:51:17,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 11:51:17,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 11:51:17,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 11:51:17,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:51:17" (1/1) ... [2022-04-06 11:51:17,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a0739d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:51:17, skipping insertion in model container [2022-04-06 11:51:17,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:51:17" (1/1) ... [2022-04-06 11:51:17,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 11:51:17,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 11:51:17,827 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/egcd3-ll_unwindbound5.c[490,503] [2022-04-06 11:51:17,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:51:17,864 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 11:51:17,877 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/egcd3-ll_unwindbound5.c[490,503] [2022-04-06 11:51:17,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 11:51:17,915 INFO L208 MainTranslator]: Completed translation [2022-04-06 11:51:17,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:51:17 WrapperNode [2022-04-06 11:51:17,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 11:51:17,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 11:51:17,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 11:51:17,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 11:51:17,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:51:17" (1/1) ... [2022-04-06 11:51:17,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:51:17" (1/1) ... [2022-04-06 11:51:17,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:51:17" (1/1) ... [2022-04-06 11:51:17,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:51:17" (1/1) ... [2022-04-06 11:51:17,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:51:17" (1/1) ... [2022-04-06 11:51:17,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:51:17" (1/1) ... [2022-04-06 11:51:17,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:51:17" (1/1) ... [2022-04-06 11:51:17,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 11:51:17,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 11:51:17,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 11:51:17,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 11:51:17,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:51:17" (1/1) ... [2022-04-06 11:51:17,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 11:51:18,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:18,041 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) [2022-04-06 11:51:18,061 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 [2022-04-06 11:51:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 11:51:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 11:51:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 11:51:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 11:51:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 11:51:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 11:51:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 11:51:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 11:51:18,135 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 11:51:18,137 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 11:51:18,252 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 11:51:18,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 11:51:18,256 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 11:51:18,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:51:18 BoogieIcfgContainer [2022-04-06 11:51:18,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 11:51:18,258 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 11:51:18,258 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 11:51:18,259 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 11:51:18,273 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:51:18" (1/1) ... [2022-04-06 11:51:18,275 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 11:51:18,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:51:18 BasicIcfg [2022-04-06 11:51:18,287 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 11:51:18,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 11:51:18,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 11:51:18,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 11:51:18,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:51:17" (1/4) ... [2022-04-06 11:51:18,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2628fcf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:51:18, skipping insertion in model container [2022-04-06 11:51:18,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:51:17" (2/4) ... [2022-04-06 11:51:18,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2628fcf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:51:18, skipping insertion in model container [2022-04-06 11:51:18,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:51:18" (3/4) ... [2022-04-06 11:51:18,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2628fcf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:51:18, skipping insertion in model container [2022-04-06 11:51:18,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 11:51:18" (4/4) ... [2022-04-06 11:51:18,296 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.cqvasr [2022-04-06 11:51:18,311 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 11:51:18,312 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 11:51:18,349 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 11:51:18,369 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 [2022-04-06 11:51:18,370 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 11:51:18,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 11:51:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 11:51:18,388 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:18,389 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:18,389 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:18,393 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-04-06 11:51:18,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:18,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144549141] [2022-04-06 11:51:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:18,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:18,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 11:51:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:18,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 11:51:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:18,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 11:51:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:51:18,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:18,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144549141] [2022-04-06 11:51:18,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144549141] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:51:18,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:51:18,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 11:51:18,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456278240] [2022-04-06 11:51:18,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:51:18,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 11:51:18,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:18,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 11:51:18,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:51:18,547 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:51:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:18,613 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-04-06 11:51:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 11:51:18,614 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 11:51:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:18,619 INFO L225 Difference]: With dead ends: 74 [2022-04-06 11:51:18,619 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 11:51:18,621 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 11:51:18,623 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:18,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:51:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 11:51:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-06 11:51:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 11:51:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-04-06 11:51:18,648 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-04-06 11:51:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:18,649 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-04-06 11:51:18,649 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:51:18,649 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-04-06 11:51:18,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 11:51:18,650 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:18,650 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:18,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 11:51:18,650 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-04-06 11:51:18,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:18,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890873496] [2022-04-06 11:51:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:18,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:18,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:18,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965914350] [2022-04-06 11:51:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:18,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:18,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:18,671 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) [2022-04-06 11:51:18,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 11:51:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:18,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 11:51:18,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:51:18,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:51:18,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890873496] [2022-04-06 11:51:18,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965914350] [2022-04-06 11:51:18,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965914350] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:51:18,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:51:18,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 11:51:18,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802858628] [2022-04-06 11:51:18,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:51:18,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 11:51:18,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:18,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 11:51:18,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 11:51:18,866 INFO L87 Difference]: Start difference. First operand 35 states and 45 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:51:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:18,886 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-04-06 11:51:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 11:51:18,887 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 11:51:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:18,890 INFO L225 Difference]: With dead ends: 44 [2022-04-06 11:51:18,890 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 11:51:18,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 11:51:18,891 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:18,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:51:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 11:51:18,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 11:51:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 11:51:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-04-06 11:51:18,900 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-04-06 11:51:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:18,901 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-04-06 11:51:18,901 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:51:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-04-06 11:51:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 11:51:18,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:18,902 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:18,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:19,102 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 [2022-04-06 11:51:19,103 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-04-06 11:51:19,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:19,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569671237] [2022-04-06 11:51:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:19,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:19,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:19,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748511663] [2022-04-06 11:51:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:19,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:19,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:19,120 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) [2022-04-06 11:51:19,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 11:51:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:19,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:51:19,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 11:51:19,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:51:19,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:19,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569671237] [2022-04-06 11:51:19,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:19,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748511663] [2022-04-06 11:51:19,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748511663] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:51:19,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:51:19,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 11:51:19,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105680063] [2022-04-06 11:51:19,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:51:19,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 11:51:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 11:51:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:51:19,254 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 11:51:19,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:19,331 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-04-06 11:51:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:51:19,332 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-04-06 11:51:19,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:19,332 INFO L225 Difference]: With dead ends: 57 [2022-04-06 11:51:19,332 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 11:51:19,333 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 [2022-04-06 11:51:19,334 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:19,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 148 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:51:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 11:51:19,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-04-06 11:51:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 11:51:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-04-06 11:51:19,340 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-04-06 11:51:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:19,341 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-04-06 11:51:19,341 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 11:51:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-04-06 11:51:19,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 11:51:19,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:19,341 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, 1] [2022-04-06 11:51:19,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:19,569 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 [2022-04-06 11:51:19,570 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:19,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-04-06 11:51:19,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:19,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764356318] [2022-04-06 11:51:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:19,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:19,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:19,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376998332] [2022-04-06 11:51:19,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:19,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:19,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:19,587 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) [2022-04-06 11:51:19,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 11:51:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:19,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:51:19,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:51:19,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:51:19,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:19,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764356318] [2022-04-06 11:51:19,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:19,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376998332] [2022-04-06 11:51:19,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376998332] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:51:19,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:51:19,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:51:19,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994079299] [2022-04-06 11:51:19,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:51:19,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:51:19,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:51:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:51:19,749 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:51:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:19,778 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-04-06 11:51:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:51:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-04-06 11:51:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:19,781 INFO L225 Difference]: With dead ends: 62 [2022-04-06 11:51:19,781 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 11:51:19,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:51:19,782 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:19,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:51:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 11:51:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 11:51:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 11:51:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-04-06 11:51:19,787 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-04-06 11:51:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:19,788 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-04-06 11:51:19,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:51:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-04-06 11:51:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 11:51:19,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:19,789 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:19,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 11:51:19,991 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 [2022-04-06 11:51:19,992 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:19,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:19,992 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-04-06 11:51:19,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:19,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762732537] [2022-04-06 11:51:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:19,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:20,007 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:20,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752739375] [2022-04-06 11:51:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:20,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:20,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:20,008 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) [2022-04-06 11:51:20,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 11:51:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:20,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 11:51:20,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 11:51:20,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:51:20,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:20,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762732537] [2022-04-06 11:51:20,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:20,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752739375] [2022-04-06 11:51:20,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752739375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:51:20,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:51:20,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 11:51:20,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893884378] [2022-04-06 11:51:20,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:51:20,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:51:20,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:20,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:51:20,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:51:20,251 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 11:51:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:20,392 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-04-06 11:51:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 11:51:20,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-04-06 11:51:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:20,394 INFO L225 Difference]: With dead ends: 68 [2022-04-06 11:51:20,394 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 11:51:20,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:51:20,395 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 79 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:20,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 218 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:51:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 11:51:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-04-06 11:51:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 11:51:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-04-06 11:51:20,403 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-04-06 11:51:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:20,403 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-04-06 11:51:20,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 11:51:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-04-06 11:51:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 11:51:20,404 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:20,404 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, 1, 1] [2022-04-06 11:51:20,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:20,631 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 [2022-04-06 11:51:20,632 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-04-06 11:51:20,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:20,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033233274] [2022-04-06 11:51:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:20,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:20,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:20,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729877050] [2022-04-06 11:51:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:20,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:20,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:20,643 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) [2022-04-06 11:51:20,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 11:51:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:20,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:51:20,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:51:20,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:51:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:51:20,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:20,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033233274] [2022-04-06 11:51:20,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:20,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729877050] [2022-04-06 11:51:20,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729877050] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:51:20,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:51:20,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 11:51:20,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879940395] [2022-04-06 11:51:20,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:51:20,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:51:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:20,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:51:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:51:20,834 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 11:51:20,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:20,905 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2022-04-06 11:51:20,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 11:51:20,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-04-06 11:51:20,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:20,907 INFO L225 Difference]: With dead ends: 116 [2022-04-06 11:51:20,907 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 11:51:20,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:51:20,908 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 63 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:20,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 235 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:51:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 11:51:20,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2022-04-06 11:51:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.318840579710145) internal successors, (91), 72 states have internal predecessors, (91), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 11:51:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 132 transitions. [2022-04-06 11:51:20,920 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 132 transitions. Word has length 30 [2022-04-06 11:51:20,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:20,920 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 132 transitions. [2022-04-06 11:51:20,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 11:51:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 132 transitions. [2022-04-06 11:51:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 11:51:20,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:20,921 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:20,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:21,129 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 [2022-04-06 11:51:21,131 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-04-06 11:51:21,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:21,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220654135] [2022-04-06 11:51:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:21,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:21,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742279911] [2022-04-06 11:51:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:21,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:21,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:21,142 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) [2022-04-06 11:51:21,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 11:51:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:51:21,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 11:51:21,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:51:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 11:51:21,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:21,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220654135] [2022-04-06 11:51:21,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:21,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742279911] [2022-04-06 11:51:21,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742279911] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:51:21,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:51:21,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 11:51:21,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375240894] [2022-04-06 11:51:21,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:51:21,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:51:21,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:21,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:51:21,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:51:21,320 INFO L87 Difference]: Start difference. First operand 100 states and 132 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:51:21,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:21,447 INFO L93 Difference]: Finished difference Result 186 states and 263 transitions. [2022-04-06 11:51:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 11:51:21,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-06 11:51:21,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:21,450 INFO L225 Difference]: With dead ends: 186 [2022-04-06 11:51:21,450 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 11:51:21,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-06 11:51:21,453 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 117 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:21,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 304 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:51:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 11:51:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2022-04-06 11:51:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 99 states have internal predecessors, (130), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 11:51:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-04-06 11:51:21,488 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 31 [2022-04-06 11:51:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:21,488 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-04-06 11:51:21,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:51:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-04-06 11:51:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 11:51:21,490 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:21,490 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, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:21,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 11:51:21,706 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 [2022-04-06 11:51:21,707 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-04-06 11:51:21,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:21,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236366262] [2022-04-06 11:51:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:21,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:21,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:21,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591572131] [2022-04-06 11:51:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:21,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:21,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:21,748 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) [2022-04-06 11:51:21,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 11:51:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:21,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 11:51:21,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 11:51:21,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:51:21,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:21,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236366262] [2022-04-06 11:51:21,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:21,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591572131] [2022-04-06 11:51:21,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591572131] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:51:21,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:51:21,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 11:51:21,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669442695] [2022-04-06 11:51:21,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:51:21,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:51:21,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:21,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:51:21,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:51:21,955 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 11:51:22,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:22,179 INFO L93 Difference]: Finished difference Result 156 states and 208 transitions. [2022-04-06 11:51:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 11:51:22,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-04-06 11:51:22,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:22,182 INFO L225 Difference]: With dead ends: 156 [2022-04-06 11:51:22,182 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 11:51:22,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-04-06 11:51:22,183 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 80 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:22,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 241 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 11:51:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 11:51:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2022-04-06 11:51:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.3113207547169812) internal successors, (139), 108 states have internal predecessors, (139), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 11:51:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2022-04-06 11:51:22,198 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 34 [2022-04-06 11:51:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:22,199 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2022-04-06 11:51:22,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 11:51:22,199 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2022-04-06 11:51:22,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 11:51:22,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:22,203 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:22,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:22,420 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 [2022-04-06 11:51:22,420 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-04-06 11:51:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:22,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516918280] [2022-04-06 11:51:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:22,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:22,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:22,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397289474] [2022-04-06 11:51:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:22,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:22,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:22,431 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) [2022-04-06 11:51:22,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 11:51:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:22,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 11:51:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 11:51:22,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:51:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:51:22,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:22,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516918280] [2022-04-06 11:51:22,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:22,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397289474] [2022-04-06 11:51:22,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397289474] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:51:22,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:51:22,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-04-06 11:51:22,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926273151] [2022-04-06 11:51:22,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:51:22,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 11:51:22,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:22,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 11:51:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:51:22,700 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:51:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:22,815 INFO L93 Difference]: Finished difference Result 178 states and 239 transitions. [2022-04-06 11:51:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 11:51:22,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-06 11:51:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:22,817 INFO L225 Difference]: With dead ends: 178 [2022-04-06 11:51:22,817 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 11:51:22,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-06 11:51:22,817 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 92 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:22,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 321 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:51:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 11:51:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2022-04-06 11:51:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 129 states have internal predecessors, (170), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 11:51:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 234 transitions. [2022-04-06 11:51:22,828 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 234 transitions. Word has length 36 [2022-04-06 11:51:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:22,828 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 234 transitions. [2022-04-06 11:51:22,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:51:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 234 transitions. [2022-04-06 11:51:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 11:51:22,828 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:22,829 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:22,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:23,047 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 [2022-04-06 11:51:23,048 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:23,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:23,048 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-04-06 11:51:23,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:23,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894728391] [2022-04-06 11:51:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:23,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:23,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:23,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084079721] [2022-04-06 11:51:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:23,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:23,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:23,073 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:51:23,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 11:51:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 11:51:23,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:51:23,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:51:23,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:23,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894728391] [2022-04-06 11:51:23,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:23,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084079721] [2022-04-06 11:51:23,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084079721] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:51:23,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:51:23,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 11:51:23,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362523751] [2022-04-06 11:51:23,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:51:23,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 11:51:23,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:23,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 11:51:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:51:23,178 INFO L87 Difference]: Start difference. First operand 173 states and 234 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:51:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:23,205 INFO L93 Difference]: Finished difference Result 240 states and 327 transitions. [2022-04-06 11:51:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:51:23,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-04-06 11:51:23,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:23,206 INFO L225 Difference]: With dead ends: 240 [2022-04-06 11:51:23,207 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 11:51:23,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:51:23,209 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:23,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 119 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:51:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 11:51:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-04-06 11:51:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.330708661417323) internal successors, (169), 129 states have internal predecessors, (169), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 11:51:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 233 transitions. [2022-04-06 11:51:23,223 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 233 transitions. Word has length 36 [2022-04-06 11:51:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:23,223 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 233 transitions. [2022-04-06 11:51:23,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 11:51:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 233 transitions. [2022-04-06 11:51:23,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 11:51:23,224 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:23,224 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:23,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:23,440 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 11:51:23,441 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:23,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:23,441 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-04-06 11:51:23,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:23,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355181076] [2022-04-06 11:51:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:23,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:23,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853671156] [2022-04-06 11:51:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:23,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:23,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:23,450 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:51:23,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 11:51:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:23,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:51:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 11:51:23,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:51:23,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:23,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355181076] [2022-04-06 11:51:23,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:23,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853671156] [2022-04-06 11:51:23,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853671156] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:51:23,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:51:23,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:51:23,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094297310] [2022-04-06 11:51:23,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:51:23,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:51:23,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:23,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:51:23,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:51:23,554 INFO L87 Difference]: Start difference. First operand 173 states and 233 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:51:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:23,593 INFO L93 Difference]: Finished difference Result 238 states and 333 transitions. [2022-04-06 11:51:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:51:23,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-06 11:51:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:23,597 INFO L225 Difference]: With dead ends: 238 [2022-04-06 11:51:23,597 INFO L226 Difference]: Without dead ends: 236 [2022-04-06 11:51:23,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:51:23,598 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:23,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:51:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-04-06 11:51:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 229. [2022-04-06 11:51:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 160 states have (on average 1.3625) internal successors, (218), 162 states have internal predecessors, (218), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 11:51:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 322 transitions. [2022-04-06 11:51:23,614 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 322 transitions. Word has length 39 [2022-04-06 11:51:23,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:23,615 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 322 transitions. [2022-04-06 11:51:23,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:51:23,615 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 322 transitions. [2022-04-06 11:51:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 11:51:23,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:23,616 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:23,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:23,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 11:51:23,832 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:23,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-04-06 11:51:23,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:23,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442645937] [2022-04-06 11:51:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:23,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:23,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:23,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557160119] [2022-04-06 11:51:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:23,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:23,869 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:51:23,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 11:51:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:23,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 11:51:23,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:51:24,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:51:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:51:24,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:24,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442645937] [2022-04-06 11:51:24,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:24,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557160119] [2022-04-06 11:51:24,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557160119] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:51:24,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:51:24,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 11:51:24,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190851296] [2022-04-06 11:51:24,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:51:24,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 11:51:24,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:24,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 11:51:24,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:51:24,212 INFO L87 Difference]: Start difference. First operand 229 states and 322 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 11:51:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:24,727 INFO L93 Difference]: Finished difference Result 391 states and 576 transitions. [2022-04-06 11:51:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 11:51:24,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-04-06 11:51:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:24,729 INFO L225 Difference]: With dead ends: 391 [2022-04-06 11:51:24,729 INFO L226 Difference]: Without dead ends: 389 [2022-04-06 11:51:24,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-04-06 11:51:24,730 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 159 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:24,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 348 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 11:51:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-04-06 11:51:24,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 376. [2022-04-06 11:51:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 265 states have (on average 1.4226415094339622) internal successors, (377), 267 states have internal predecessors, (377), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 90 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-06 11:51:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 561 transitions. [2022-04-06 11:51:24,753 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 561 transitions. Word has length 41 [2022-04-06 11:51:24,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:24,753 INFO L478 AbstractCegarLoop]: Abstraction has 376 states and 561 transitions. [2022-04-06 11:51:24,753 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 11:51:24,753 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 561 transitions. [2022-04-06 11:51:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 11:51:24,753 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:24,753 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:24,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:24,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 11:51:24,967 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:24,967 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-04-06 11:51:24,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:24,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115779159] [2022-04-06 11:51:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:24,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:24,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:24,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443438700] [2022-04-06 11:51:24,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:24,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:24,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:24,980 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:51:24,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 11:51:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:25,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 11:51:25,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 11:51:25,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:51:25,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:25,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115779159] [2022-04-06 11:51:25,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:25,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443438700] [2022-04-06 11:51:25,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443438700] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:51:25,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:51:25,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:51:25,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631623886] [2022-04-06 11:51:25,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:51:25,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:51:25,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:25,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:51:25,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:51:25,103 INFO L87 Difference]: Start difference. First operand 376 states and 561 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 11:51:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:25,165 INFO L93 Difference]: Finished difference Result 560 states and 878 transitions. [2022-04-06 11:51:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 11:51:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-04-06 11:51:25,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:25,168 INFO L225 Difference]: With dead ends: 560 [2022-04-06 11:51:25,168 INFO L226 Difference]: Without dead ends: 558 [2022-04-06 11:51:25,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 11:51:25,169 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:25,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 166 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:51:25,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-04-06 11:51:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 494. [2022-04-06 11:51:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 306 states have (on average 1.4248366013071896) internal successors, (436), 327 states have internal predecessors, (436), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 147 states have call predecessors, (167), 167 states have call successors, (167) [2022-04-06 11:51:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 772 transitions. [2022-04-06 11:51:25,223 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 772 transitions. Word has length 44 [2022-04-06 11:51:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:25,223 INFO L478 AbstractCegarLoop]: Abstraction has 494 states and 772 transitions. [2022-04-06 11:51:25,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 11:51:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 772 transitions. [2022-04-06 11:51:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 11:51:25,223 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:25,223 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:25,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:25,440 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 11:51:25,440 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-04-06 11:51:25,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:25,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136420104] [2022-04-06 11:51:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:25,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:25,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:25,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565285571] [2022-04-06 11:51:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:25,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:25,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:25,448 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:51:25,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 11:51:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:25,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 11:51:25,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 11:51:25,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:51:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 11:51:25,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:25,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136420104] [2022-04-06 11:51:25,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:25,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565285571] [2022-04-06 11:51:25,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565285571] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:51:25,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:51:25,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-04-06 11:51:25,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988780256] [2022-04-06 11:51:25,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:51:25,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 11:51:25,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:25,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 11:51:25,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 11:51:25,647 INFO L87 Difference]: Start difference. First operand 494 states and 772 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 11:51:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:25,734 INFO L93 Difference]: Finished difference Result 859 states and 1366 transitions. [2022-04-06 11:51:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 11:51:25,735 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-06 11:51:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:25,737 INFO L225 Difference]: With dead ends: 859 [2022-04-06 11:51:25,737 INFO L226 Difference]: Without dead ends: 502 [2022-04-06 11:51:25,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-04-06 11:51:25,739 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 48 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:25,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 260 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:51:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-04-06 11:51:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 498. [2022-04-06 11:51:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 310 states have (on average 1.4161290322580644) internal successors, (439), 330 states have internal predecessors, (439), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-04-06 11:51:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 775 transitions. [2022-04-06 11:51:25,774 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 775 transitions. Word has length 42 [2022-04-06 11:51:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:25,774 INFO L478 AbstractCegarLoop]: Abstraction has 498 states and 775 transitions. [2022-04-06 11:51:25,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 11:51:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 775 transitions. [2022-04-06 11:51:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 11:51:25,775 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:25,775 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:25,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:25,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 11:51:25,992 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2022-04-06 11:51:25,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:25,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393734185] [2022-04-06 11:51:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:25,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:25,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:25,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362918948] [2022-04-06 11:51:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:25,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:25,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:25,999 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:51:26,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 11:51:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:26,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 11:51:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:51:26,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:51:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 11:51:26,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393734185] [2022-04-06 11:51:26,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362918948] [2022-04-06 11:51:26,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362918948] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:51:26,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:51:26,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 11:51:26,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924035978] [2022-04-06 11:51:26,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:51:26,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 11:51:26,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:26,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 11:51:26,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 11:51:26,195 INFO L87 Difference]: Start difference. First operand 498 states and 775 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:51:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:26,303 INFO L93 Difference]: Finished difference Result 859 states and 1363 transitions. [2022-04-06 11:51:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 11:51:26,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-04-06 11:51:26,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:26,305 INFO L225 Difference]: With dead ends: 859 [2022-04-06 11:51:26,305 INFO L226 Difference]: Without dead ends: 504 [2022-04-06 11:51:26,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 11:51:26,307 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 52 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:26,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 204 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 11:51:26,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-04-06 11:51:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2022-04-06 11:51:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 314 states have (on average 1.4044585987261147) internal successors, (441), 334 states have internal predecessors, (441), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-04-06 11:51:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 777 transitions. [2022-04-06 11:51:26,352 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 777 transitions. Word has length 42 [2022-04-06 11:51:26,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:26,352 INFO L478 AbstractCegarLoop]: Abstraction has 502 states and 777 transitions. [2022-04-06 11:51:26,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 11:51:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 777 transitions. [2022-04-06 11:51:26,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 11:51:26,353 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:26,353 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:26,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:26,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:26,568 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2022-04-06 11:51:26,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:26,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006766955] [2022-04-06 11:51:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:26,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:26,574 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:26,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333862545] [2022-04-06 11:51:26,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 11:51:26,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:26,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:26,581 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:51:26,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 11:51:26,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 11:51:26,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 11:51:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 11:51:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 11:51:26,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 11:51:26,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:26,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006766955] [2022-04-06 11:51:26,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:26,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333862545] [2022-04-06 11:51:26,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333862545] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 11:51:26,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 11:51:26,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 11:51:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353292457] [2022-04-06 11:51:26,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 11:51:26,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 11:51:26,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 11:51:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 11:51:26,701 INFO L87 Difference]: Start difference. First operand 502 states and 777 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 11:51:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:26,829 INFO L93 Difference]: Finished difference Result 1073 states and 1723 transitions. [2022-04-06 11:51:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 11:51:26,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-04-06 11:51:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:26,833 INFO L225 Difference]: With dead ends: 1073 [2022-04-06 11:51:26,833 INFO L226 Difference]: Without dead ends: 760 [2022-04-06 11:51:26,834 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 11:51:26,835 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 29 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:26,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 173 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 11:51:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-04-06 11:51:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 523. [2022-04-06 11:51:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 351 states have (on average 1.396011396011396) internal successors, (490), 369 states have internal predecessors, (490), 153 states have call successors, (153), 19 states have call predecessors, (153), 18 states have return successors, (151), 134 states have call predecessors, (151), 151 states have call successors, (151) [2022-04-06 11:51:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 794 transitions. [2022-04-06 11:51:26,875 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 794 transitions. Word has length 43 [2022-04-06 11:51:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:26,875 INFO L478 AbstractCegarLoop]: Abstraction has 523 states and 794 transitions. [2022-04-06 11:51:26,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 11:51:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 794 transitions. [2022-04-06 11:51:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 11:51:26,875 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:26,876 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:26,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:27,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 11:51:27,094 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:27,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:27,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-04-06 11:51:27,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:27,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579129901] [2022-04-06 11:51:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:27,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:27,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:27,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964612476] [2022-04-06 11:51:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:27,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:27,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:27,102 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:51:27,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 11:51:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 11:51:27,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 11:51:27,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 11:51:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 11:51:27,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 11:51:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 11:51:28,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 11:51:28,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579129901] [2022-04-06 11:51:28,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 11:51:28,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964612476] [2022-04-06 11:51:28,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964612476] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 11:51:28,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 11:51:28,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 11:51:28,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769840980] [2022-04-06 11:51:28,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 11:51:28,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 11:51:28,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 11:51:28,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 11:51:28,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-06 11:51:28,212 INFO L87 Difference]: Start difference. First operand 523 states and 794 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-06 11:51:34,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 11:51:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 11:51:38,752 INFO L93 Difference]: Finished difference Result 838 states and 1289 transitions. [2022-04-06 11:51:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 11:51:38,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-04-06 11:51:38,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 11:51:38,770 INFO L225 Difference]: With dead ends: 838 [2022-04-06 11:51:38,770 INFO L226 Difference]: Without dead ends: 834 [2022-04-06 11:51:38,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 11:51:38,771 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 173 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-04-06 11:51:38,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 525 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-04-06 11:51:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-04-06 11:51:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 673. [2022-04-06 11:51:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 474 states have (on average 1.40084388185654) internal successors, (664), 486 states have internal predecessors, (664), 177 states have call successors, (177), 22 states have call predecessors, (177), 21 states have return successors, (175), 164 states have call predecessors, (175), 175 states have call successors, (175) [2022-04-06 11:51:38,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1016 transitions. [2022-04-06 11:51:38,873 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1016 transitions. Word has length 58 [2022-04-06 11:51:38,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 11:51:38,873 INFO L478 AbstractCegarLoop]: Abstraction has 673 states and 1016 transitions. [2022-04-06 11:51:38,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-04-06 11:51:38,873 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1016 transitions. [2022-04-06 11:51:38,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 11:51:38,874 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 11:51:38,874 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:38,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:39,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 11:51:39,075 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 11:51:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 11:51:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2022-04-06 11:51:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 11:51:39,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820186004] [2022-04-06 11:51:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:39,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 11:51:39,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 11:51:39,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764284110] [2022-04-06 11:51:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 11:51:39,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 11:51:39,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 11:51:39,083 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 11:51:39,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 11:51:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 11:51:39,126 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 11:51:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 11:51:39,185 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 11:51:39,185 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 11:51:39,186 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 11:51:39,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 11:51:39,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 11:51:39,390 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 11:51:39,391 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 11:51:39,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:51:39 BasicIcfg [2022-04-06 11:51:39,437 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 11:51:39,437 INFO L158 Benchmark]: Toolchain (without parser) took 21762.89ms. Allocated memory was 195.0MB in the beginning and 334.5MB in the end (delta: 139.5MB). Free memory was 139.7MB in the beginning and 227.2MB in the end (delta: -87.5MB). Peak memory consumption was 53.0MB. Max. memory is 8.0GB. [2022-04-06 11:51:39,437 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 195.0MB. Free memory is still 156.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 11:51:39,437 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.35ms. Allocated memory is still 195.0MB. Free memory was 139.6MB in the beginning and 171.0MB in the end (delta: -31.4MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-04-06 11:51:39,438 INFO L158 Benchmark]: Boogie Preprocessor took 45.57ms. Allocated memory is still 195.0MB. Free memory was 171.0MB in the beginning and 169.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 11:51:39,438 INFO L158 Benchmark]: RCFGBuilder took 286.05ms. Allocated memory is still 195.0MB. Free memory was 169.5MB in the beginning and 157.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 11:51:39,438 INFO L158 Benchmark]: IcfgTransformer took 29.70ms. Allocated memory is still 195.0MB. Free memory was 157.9MB in the beginning and 156.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 11:51:39,438 INFO L158 Benchmark]: TraceAbstraction took 21148.35ms. Allocated memory was 195.0MB in the beginning and 334.5MB in the end (delta: 139.5MB). Free memory was 155.8MB in the beginning and 227.2MB in the end (delta: -71.4MB). Peak memory consumption was 69.2MB. Max. memory is 8.0GB. [2022-04-06 11:51:39,439 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 195.0MB. Free memory is still 156.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 240.35ms. Allocated memory is still 195.0MB. Free memory was 139.6MB in the beginning and 171.0MB in the end (delta: -31.4MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.57ms. Allocated memory is still 195.0MB. Free memory was 171.0MB in the beginning and 169.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 286.05ms. Allocated memory is still 195.0MB. Free memory was 169.5MB in the beginning and 157.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 29.70ms. Allocated memory is still 195.0MB. Free memory was 157.9MB in the beginning and 156.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 21148.35ms. Allocated memory was 195.0MB in the beginning and 334.5MB in the end (delta: 139.5MB). Free memory was 155.8MB in the beginning and 227.2MB in the end (delta: -71.4MB). Peak memory consumption was 69.2MB. 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: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=10, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=2, b=3, counter=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=7] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.0s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 12.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1049 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 992 mSDsluCounter, 3689 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2838 mSDsCounter, 639 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2659 IncrementalHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 639 mSolverCounterUnsat, 851 mSDtfsCounter, 2659 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 914 GetRequests, 747 SyntacticMatches, 7 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=673occurred in iteration=17, InterpolantAutomatonStates: 154, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 578 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 666 NumberOfCodeBlocks, 666 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 859 ConstructedInterpolants, 0 QuantifiedInterpolants, 3856 SizeOfPredicates, 54 NumberOfNonLiveVariables, 2313 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 24 InterpolantComputations, 10 PerfectInterpolantSequences, 246/348 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! [2022-04-06 11:51:39,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...