/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/hard-u_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 23:10:32,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 23:10:32,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 23:10:32,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 23:10:32,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 23:10:32,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 23:10:32,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 23:10:32,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 23:10:32,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 23:10:32,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 23:10:32,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 23:10:32,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 23:10:32,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 23:10:32,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 23:10:32,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 23:10:32,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 23:10:32,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 23:10:32,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 23:10:32,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 23:10:32,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 23:10:32,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 23:10:32,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 23:10:32,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 23:10:32,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 23:10:32,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 23:10:32,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 23:10:32,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 23:10:32,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 23:10:32,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 23:10:32,714 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 23:10:32,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 23:10:32,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 23:10:32,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 23:10:32,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 23:10:32,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 23:10:32,716 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 23:10:32,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 23:10:32,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 23:10:32,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 23:10:32,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 23:10:32,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 23:10:32,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 23:10:32,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 23:10:32,717 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 23:10:32,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 23:10:32,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 23:10:32,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 23:10:32,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 23:10:32,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 23:10:32,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 23:10:32,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 23:10:32,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 23:10:32,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 23:10:32,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 23:10:32,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 23:10:32,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 23:10:32,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 23:10:32,719 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 23:10:32,719 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 23:10:32,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 23:10:32,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 23:10:32,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 23:10:32,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 23:10:32,918 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 23:10:32,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c [2022-02-23 23:10:32,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae7470f0/cfa3d8efd38a49508540a90c2fb7ff14/FLAG3f910ea25 [2022-02-23 23:10:33,286 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 23:10:33,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c [2022-02-23 23:10:33,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae7470f0/cfa3d8efd38a49508540a90c2fb7ff14/FLAG3f910ea25 [2022-02-23 23:10:33,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae7470f0/cfa3d8efd38a49508540a90c2fb7ff14 [2022-02-23 23:10:33,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 23:10:33,728 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 23:10:33,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 23:10:33,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 23:10:33,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 23:10:33,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:10:33" (1/1) ... [2022-02-23 23:10:33,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c8ba60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:10:33, skipping insertion in model container [2022-02-23 23:10:33,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:10:33" (1/1) ... [2022-02-23 23:10:33,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 23:10:33,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 23:10:33,873 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/hard-u_unwindbound20.c[537,550] [2022-02-23 23:10:33,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 23:10:33,899 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 23:10:33,911 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/hard-u_unwindbound20.c[537,550] [2022-02-23 23:10:33,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 23:10:33,933 INFO L208 MainTranslator]: Completed translation [2022-02-23 23:10:33,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:10:33 WrapperNode [2022-02-23 23:10:33,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 23:10:33,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 23:10:33,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 23:10:33,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 23:10:33,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:10:33" (1/1) ... [2022-02-23 23:10:33,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:10:33" (1/1) ... [2022-02-23 23:10:33,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:10:33" (1/1) ... [2022-02-23 23:10:33,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:10:33" (1/1) ... [2022-02-23 23:10:33,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:10:33" (1/1) ... [2022-02-23 23:10:33,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:10:33" (1/1) ... [2022-02-23 23:10:33,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:10:33" (1/1) ... [2022-02-23 23:10:33,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 23:10:33,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 23:10:33,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 23:10:33,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 23:10:33,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:10:33" (1/1) ... [2022-02-23 23:10:33,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 23:10:33,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:33,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 23:10:34,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 23:10:34,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 23:10:34,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 23:10:34,019 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 23:10:34,019 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 23:10:34,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 23:10:34,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 23:10:34,020 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 23:10:34,020 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 23:10:34,021 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 23:10:34,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 23:10:34,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 23:10:34,021 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 23:10:34,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 23:10:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 23:10:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 23:10:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 23:10:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 23:10:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 23:10:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 23:10:34,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 23:10:34,069 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 23:10:34,070 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 23:10:34,169 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 23:10:34,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 23:10:34,173 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 23:10:34,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:10:34 BoogieIcfgContainer [2022-02-23 23:10:34,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 23:10:34,174 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 23:10:34,174 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 23:10:34,200 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 23:10:34,202 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:10:34" (1/1) ... [2022-02-23 23:10:34,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 11:10:34 BasicIcfg [2022-02-23 23:10:34,222 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 23:10:34,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 23:10:34,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 23:10:34,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 23:10:34,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:10:33" (1/4) ... [2022-02-23 23:10:34,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f6e7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:10:34, skipping insertion in model container [2022-02-23 23:10:34,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:10:33" (2/4) ... [2022-02-23 23:10:34,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f6e7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:10:34, skipping insertion in model container [2022-02-23 23:10:34,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:10:34" (3/4) ... [2022-02-23 23:10:34,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f6e7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:10:34, skipping insertion in model container [2022-02-23 23:10:34,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 11:10:34" (4/4) ... [2022-02-23 23:10:34,238 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound20.cqvasr [2022-02-23 23:10:34,241 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 23:10:34,241 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 23:10:34,269 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 23:10:34,273 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 23:10:34,274 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 23:10:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 23:10:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 23:10:34,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:34,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:10:34,288 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-02-23 23:10:34,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:34,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632525675] [2022-02-23 23:10:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:34,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:34,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:10:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:34,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 23:10:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:10:34,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:34,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632525675] [2022-02-23 23:10:34,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632525675] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:10:34,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:10:34,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 23:10:34,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659691206] [2022-02-23 23:10:34,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:10:34,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 23:10:34,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 23:10:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 23:10:34,506 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:10:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:34,597 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-02-23 23:10:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 23:10:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-23 23:10:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:34,610 INFO L225 Difference]: With dead ends: 66 [2022-02-23 23:10:34,611 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 23:10:34,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 23:10:34,616 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:34,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:10:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 23:10:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-02-23 23:10:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:10:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-02-23 23:10:34,655 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-02-23 23:10:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:34,656 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-02-23 23:10:34,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:10:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-02-23 23:10:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 23:10:34,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:34,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:10:34,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 23:10:34,658 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:34,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:34,658 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-02-23 23:10:34,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:34,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279508145] [2022-02-23 23:10:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:34,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:34,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:10:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:34,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 23:10:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:10:34,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:34,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279508145] [2022-02-23 23:10:34,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279508145] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:10:34,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:10:34,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:10:34,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44804837] [2022-02-23 23:10:34,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:10:34,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:10:34,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:10:34,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:10:34,784 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:10:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:34,931 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-02-23 23:10:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 23:10:34,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-23 23:10:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:34,933 INFO L225 Difference]: With dead ends: 47 [2022-02-23 23:10:34,933 INFO L226 Difference]: Without dead ends: 45 [2022-02-23 23:10:34,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:10:34,934 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:34,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:10:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-23 23:10:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-02-23 23:10:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:10:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-02-23 23:10:34,955 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-02-23 23:10:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:34,955 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-02-23 23:10:34,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:10:34,956 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-02-23 23:10:34,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-23 23:10:34,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:34,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:10:34,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 23:10:34,958 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:34,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-02-23 23:10:34,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:34,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8498418] [2022-02-23 23:10:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:34,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:34,983 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:34,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667661114] [2022-02-23 23:10:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:34,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:34,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:34,986 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:10:34,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 23:10:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:35,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 23:10:35,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:10:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:10:35,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:10:35,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:35,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8498418] [2022-02-23 23:10:35,126 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:10:35,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667661114] [2022-02-23 23:10:35,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667661114] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:10:35,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:10:35,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 23:10:35,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98322118] [2022-02-23 23:10:35,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:10:35,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 23:10:35,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:35,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 23:10:35,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 23:10:35,130 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 23:10:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:35,155 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-02-23 23:10:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 23:10:35,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-23 23:10:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:35,158 INFO L225 Difference]: With dead ends: 52 [2022-02-23 23:10:35,158 INFO L226 Difference]: Without dead ends: 38 [2022-02-23 23:10:35,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 23:10:35,161 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:35,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:10:35,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-23 23:10:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-23 23:10:35,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:10:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-02-23 23:10:35,177 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-02-23 23:10:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:35,178 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-02-23 23:10:35,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 23:10:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-02-23 23:10:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 23:10:35,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:35,178 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:10:35,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 23:10:35,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:35,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:35,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-02-23 23:10:35,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:35,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283332073] [2022-02-23 23:10:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:35,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:35,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:10:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:35,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 23:10:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:35,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-23 23:10:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:10:35,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:35,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283332073] [2022-02-23 23:10:35,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283332073] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:10:35,475 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:10:35,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:10:35,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980156165] [2022-02-23 23:10:35,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:10:35,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:10:35,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:10:35,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:10:35,478 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 23:10:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:35,595 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-02-23 23:10:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 23:10:35,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 23:10:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:35,597 INFO L225 Difference]: With dead ends: 52 [2022-02-23 23:10:35,597 INFO L226 Difference]: Without dead ends: 50 [2022-02-23 23:10:35,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:10:35,604 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:35,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:10:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-23 23:10:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-02-23 23:10:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 23:10:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-02-23 23:10:35,631 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-02-23 23:10:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:35,632 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-02-23 23:10:35,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 23:10:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-02-23 23:10:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 23:10:35,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:35,633 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:10:35,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 23:10:35,633 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-02-23 23:10:35,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:35,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592420694] [2022-02-23 23:10:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:35,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:35,641 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:35,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318807582] [2022-02-23 23:10:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:35,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:35,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:35,642 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:10:35,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 23:10:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:35,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:10:35,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:10:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 23:10:35,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:10:35,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:35,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592420694] [2022-02-23 23:10:35,746 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:10:35,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318807582] [2022-02-23 23:10:35,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318807582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:10:35,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:10:35,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:10:35,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602343849] [2022-02-23 23:10:35,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:10:35,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:10:35,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:35,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:10:35,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:10:35,747 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 23:10:37,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-23 23:10:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:37,951 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-02-23 23:10:37,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:10:37,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-23 23:10:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:37,953 INFO L225 Difference]: With dead ends: 59 [2022-02-23 23:10:37,953 INFO L226 Difference]: Without dead ends: 56 [2022-02-23 23:10:37,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:10:37,954 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:37,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-02-23 23:10:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-23 23:10:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-23 23:10:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 23:10:37,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-02-23 23:10:37,961 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-02-23 23:10:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:37,961 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-02-23 23:10:37,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 23:10:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-02-23 23:10:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 23:10:37,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:37,962 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2022-02-23 23:10:37,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 23:10:38,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:38,163 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:38,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-02-23 23:10:38,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:38,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092232258] [2022-02-23 23:10:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:38,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:38,171 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:38,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845067959] [2022-02-23 23:10:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:38,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:38,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:38,172 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:10:38,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 23:10:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:38,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:10:38,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:10:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:10:38,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:10:38,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:38,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092232258] [2022-02-23 23:10:38,311 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:10:38,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845067959] [2022-02-23 23:10:38,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845067959] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:10:38,311 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:10:38,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:10:38,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375883818] [2022-02-23 23:10:38,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:10:38,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:10:38,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:38,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:10:38,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:10:38,313 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 23:10:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:38,346 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-02-23 23:10:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:10:38,347 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-02-23 23:10:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:38,348 INFO L225 Difference]: With dead ends: 76 [2022-02-23 23:10:38,348 INFO L226 Difference]: Without dead ends: 69 [2022-02-23 23:10:38,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:10:38,348 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:38,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:10:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-23 23:10:38,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-02-23 23:10:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 23:10:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-02-23 23:10:38,354 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-02-23 23:10:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:38,355 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-02-23 23:10:38,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 23:10:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-02-23 23:10:38,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 23:10:38,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:38,356 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2022-02-23 23:10:38,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 23:10:38,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:38,567 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-02-23 23:10:38,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:38,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296496049] [2022-02-23 23:10:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:38,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:38,575 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:38,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377744489] [2022-02-23 23:10:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:38,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:38,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:38,576 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:10:38,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 23:10:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:38,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 23:10:38,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:10:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:10:38,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:10:38,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:38,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296496049] [2022-02-23 23:10:38,766 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:10:38,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377744489] [2022-02-23 23:10:38,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377744489] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:10:38,767 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:10:38,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:10:38,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138315274] [2022-02-23 23:10:38,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:10:38,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:10:38,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:10:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:10:38,768 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-02-23 23:10:39,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:39,159 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-02-23 23:10:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 23:10:39,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-23 23:10:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:39,160 INFO L225 Difference]: With dead ends: 82 [2022-02-23 23:10:39,161 INFO L226 Difference]: Without dead ends: 79 [2022-02-23 23:10:39,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 23:10:39,161 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:39,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 23:10:39,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-23 23:10:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-02-23 23:10:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 23:10:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-02-23 23:10:39,168 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-02-23 23:10:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:39,168 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-02-23 23:10:39,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-02-23 23:10:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-02-23 23:10:39,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-23 23:10:39,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:39,169 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2022-02-23 23:10:39,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 23:10:39,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:39,379 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:39,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-02-23 23:10:39,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:39,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89515649] [2022-02-23 23:10:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:39,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:39,386 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:39,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439085356] [2022-02-23 23:10:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:39,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:39,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:39,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:10:39,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 23:10:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:39,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:10:39,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:10:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:10:39,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:10:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:10:39,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:39,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89515649] [2022-02-23 23:10:39,607 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:10:39,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439085356] [2022-02-23 23:10:39,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439085356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:10:39,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:10:39,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 23:10:39,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878192979] [2022-02-23 23:10:39,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:10:39,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 23:10:39,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 23:10:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 23:10:39,608 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-23 23:10:39,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:39,745 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2022-02-23 23:10:39,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 23:10:39,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-02-23 23:10:39,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:39,749 INFO L225 Difference]: With dead ends: 160 [2022-02-23 23:10:39,749 INFO L226 Difference]: Without dead ends: 146 [2022-02-23 23:10:39,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 23:10:39,751 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:39,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 224 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:10:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-23 23:10:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-02-23 23:10:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-23 23:10:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-02-23 23:10:39,766 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-02-23 23:10:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:39,767 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-02-23 23:10:39,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-23 23:10:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-02-23 23:10:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-23 23:10:39,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:39,772 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:10:39,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 23:10:39,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:39,989 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:39,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-02-23 23:10:39,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:39,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580112757] [2022-02-23 23:10:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:39,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:40,003 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:40,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75855115] [2022-02-23 23:10:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:40,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:40,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:40,016 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 23:10:40,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 23:10:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-23 23:10:40,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:10:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 23:10:40,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:10:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 23:10:40,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:40,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580112757] [2022-02-23 23:10:40,567 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:10:40,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75855115] [2022-02-23 23:10:40,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75855115] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 23:10:40,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 23:10:40,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-23 23:10:40,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125960401] [2022-02-23 23:10:40,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:10:40,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:10:40,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:10:40,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-23 23:10:40,568 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-23 23:10:42,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:10:44,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:10:46,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 23:10:47,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:47,079 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-02-23 23:10:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:10:47,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-02-23 23:10:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:47,081 INFO L225 Difference]: With dead ends: 162 [2022-02-23 23:10:47,081 INFO L226 Difference]: Without dead ends: 160 [2022-02-23 23:10:47,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-23 23:10:47,082 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:47,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2022-02-23 23:10:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-23 23:10:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-02-23 23:10:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-23 23:10:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-02-23 23:10:47,092 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-02-23 23:10:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:47,093 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-02-23 23:10:47,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-23 23:10:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-02-23 23:10:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 23:10:47,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:47,094 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:10:47,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-23 23:10:47,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:47,298 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-02-23 23:10:47,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:47,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398224016] [2022-02-23 23:10:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:47,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:47,310 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:47,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988759473] [2022-02-23 23:10:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:47,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:47,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:47,316 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) [2022-02-23 23:10:47,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 23:10:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:10:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 23:10:47,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:10:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 23:10:47,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:10:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 23:10:47,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:10:47,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398224016] [2022-02-23 23:10:47,591 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:10:47,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988759473] [2022-02-23 23:10:47,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988759473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:10:47,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:10:47,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 23:10:47,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604380304] [2022-02-23 23:10:47,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:10:47,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 23:10:47,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:10:47,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 23:10:47,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 23:10:47,592 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 23:10:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:10:48,383 INFO L93 Difference]: Finished difference Result 281 states and 346 transitions. [2022-02-23 23:10:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 23:10:48,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-02-23 23:10:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:10:48,385 INFO L225 Difference]: With dead ends: 281 [2022-02-23 23:10:48,385 INFO L226 Difference]: Without dead ends: 257 [2022-02-23 23:10:48,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-23 23:10:48,386 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 96 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-23 23:10:48,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 330 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-23 23:10:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-23 23:10:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-02-23 23:10:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 160 states have (on average 1.2) internal successors, (192), 172 states have internal predecessors, (192), 59 states have call successors, (59), 31 states have call predecessors, (59), 30 states have return successors, (54), 46 states have call predecessors, (54), 54 states have call successors, (54) [2022-02-23 23:10:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 305 transitions. [2022-02-23 23:10:48,400 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 305 transitions. Word has length 50 [2022-02-23 23:10:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:10:48,401 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 305 transitions. [2022-02-23 23:10:48,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 23:10:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 305 transitions. [2022-02-23 23:10:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 23:10:48,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:10:48,401 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-02-23 23:10:48,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 23:10:48,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:48,615 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:10:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:10:48,616 INFO L85 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2022-02-23 23:10:48,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:10:48,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131495545] [2022-02-23 23:10:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:48,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:10:48,622 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:10:48,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906689260] [2022-02-23 23:10:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:10:48,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:10:48,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:10:48,623 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) [2022-02-23 23:10:48,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process