/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:05:44,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:05:44,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:05:44,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 14:05:44,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 14:05:44,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 14:05:44,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 14:05:44,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 14:05:44,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 14:05:44,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 14:05:44,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 14:05:44,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 14:05:44,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 14:05:44,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 14:05:44,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 14:05:44,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 14:05:44,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 14:05:44,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 14:05:44,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 14:05:44,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 14:05:44,788 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 14:05:44,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 14:05:44,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 14:05:44,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 14:05:44,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 14:05:44,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 14:05:44,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 14:05:44,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 14:05:44,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 14:05:44,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 14:05:44,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 14:05:44,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 14:05:44,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 14:05:44,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 14:05:44,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 14:05:44,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 14:05:44,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 14:05:44,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 14:05:44,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 14:05:44,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:05:44,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:05:44,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:05:44,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 14:05:44,814 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:05:44,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:05:44,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:05:44,815 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:05:44,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:05:44,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:05:44,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:05:44,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:05:44,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:05:44,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:05:44,816 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:05:44,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:05:44,816 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:05:44,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:05:44,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:05:44,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:05:44,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:05:44,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:05:44,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:05:44,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:05:44,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:05:44,817 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:05:44,817 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:05:44,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:05:44,817 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:05:44,818 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:05:45,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:05:45,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:05:45,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:05:45,110 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:05:45,111 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:05:45,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2022-03-20 14:05:45,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf0d8253/d406b93da0c847399b992fadc7217155/FLAGce752030a [2022-03-20 14:05:45,461 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:05:45,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2022-03-20 14:05:45,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf0d8253/d406b93da0c847399b992fadc7217155/FLAGce752030a [2022-03-20 14:05:45,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf0d8253/d406b93da0c847399b992fadc7217155 [2022-03-20 14:05:45,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:05:45,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:05:45,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:05:45,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:05:45,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:05:45,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:05:45" (1/1) ... [2022-03-20 14:05:45,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f2b695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:05:45, skipping insertion in model container [2022-03-20 14:05:45,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:05:45" (1/1) ... [2022-03-20 14:05:45,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:05:45,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:05:46,042 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/cohencu-ll_unwindbound5.c[588,601] [2022-03-20 14:05:46,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:05:46,062 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:05:46,069 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/cohencu-ll_unwindbound5.c[588,601] [2022-03-20 14:05:46,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:05:46,083 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:05:46,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:05:46 WrapperNode [2022-03-20 14:05:46,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:05:46,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:05:46,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:05:46,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:05:46,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:05:46" (1/1) ... [2022-03-20 14:05:46,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:05:46" (1/1) ... [2022-03-20 14:05:46,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:05:46" (1/1) ... [2022-03-20 14:05:46,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:05:46" (1/1) ... [2022-03-20 14:05:46,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:05:46" (1/1) ... [2022-03-20 14:05:46,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:05:46" (1/1) ... [2022-03-20 14:05:46,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:05:46" (1/1) ... [2022-03-20 14:05:46,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:05:46,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:05:46,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:05:46,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:05:46,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:05:46" (1/1) ... [2022-03-20 14:05:46,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:05:46,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:46,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 14:05:46,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 14:05:46,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:05:46,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:05:46,183 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:05:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:05:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:05:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:05:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:05:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:05:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:05:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:05:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-20 14:05:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:05:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:05:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:05:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:05:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:05:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:05:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:05:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:05:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:05:46,239 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:05:46,241 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:05:46,396 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:05:46,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:05:46,402 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 14:05:46,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:05:46 BoogieIcfgContainer [2022-03-20 14:05:46,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:05:46,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:05:46,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:05:46,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:05:46,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:05:45" (1/3) ... [2022-03-20 14:05:46,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d66304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:05:46, skipping insertion in model container [2022-03-20 14:05:46,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:05:46" (2/3) ... [2022-03-20 14:05:46,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d66304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:05:46, skipping insertion in model container [2022-03-20 14:05:46,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:05:46" (3/3) ... [2022-03-20 14:05:46,423 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound5.c [2022-03-20 14:05:46,426 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:05:46,426 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:05:46,474 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:05:46,478 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 14:05:46,478 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:05:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 14:05:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 14:05:46,520 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:46,520 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:46,521 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:46,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1839589780, now seen corresponding path program 1 times [2022-03-20 14:05:46,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:46,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481157401] [2022-03-20 14:05:46,543 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:46,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1839589780, now seen corresponding path program 2 times [2022-03-20 14:05:46,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:46,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755281091] [2022-03-20 14:05:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:46,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:05:46,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:05:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:05:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:05:46,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:46,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755281091] [2022-03-20 14:05:46,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755281091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:46,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:46,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:05:46,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:46,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481157401] [2022-03-20 14:05:46,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481157401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:46,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:46,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:05:46,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111575481] [2022-03-20 14:05:46,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:46,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:05:46,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:46,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:05:46,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:05:46,742 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 14:05:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:46,850 INFO L93 Difference]: Finished difference Result 57 states and 95 transitions. [2022-03-20 14:05:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:05:46,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 14:05:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:46,858 INFO L225 Difference]: With dead ends: 57 [2022-03-20 14:05:46,858 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 14:05:46,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:05:46,866 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:46,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:05:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 14:05:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 14:05:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:05:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2022-03-20 14:05:46,904 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2022-03-20 14:05:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:46,904 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2022-03-20 14:05:46,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 14:05:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2022-03-20 14:05:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 14:05:46,906 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:46,906 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:46,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:05:46,906 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:46,907 INFO L85 PathProgramCache]: Analyzing trace with hash 660459433, now seen corresponding path program 1 times [2022-03-20 14:05:46,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:46,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [622051489] [2022-03-20 14:05:46,909 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:46,909 INFO L85 PathProgramCache]: Analyzing trace with hash 660459433, now seen corresponding path program 2 times [2022-03-20 14:05:46,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:46,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589308649] [2022-03-20 14:05:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:46,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:05:46,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:05:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:05:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:05:47,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:47,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589308649] [2022-03-20 14:05:47,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589308649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:47,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:47,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 14:05:47,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:47,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [622051489] [2022-03-20 14:05:47,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [622051489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:47,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:47,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 14:05:47,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045907184] [2022-03-20 14:05:47,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:47,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:05:47,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:05:47,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:05:47,018 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 14:05:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:47,111 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-03-20 14:05:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:05:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 14:05:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:47,115 INFO L225 Difference]: With dead ends: 40 [2022-03-20 14:05:47,117 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 14:05:47,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:05:47,124 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:47,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:05:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 14:05:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-20 14:05:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:05:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-03-20 14:05:47,139 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2022-03-20 14:05:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:47,140 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-03-20 14:05:47,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 14:05:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-03-20 14:05:47,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 14:05:47,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:47,140 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:47,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 14:05:47,141 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:47,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:47,141 INFO L85 PathProgramCache]: Analyzing trace with hash 662008565, now seen corresponding path program 1 times [2022-03-20 14:05:47,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:47,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1324982170] [2022-03-20 14:05:47,143 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:47,144 INFO L85 PathProgramCache]: Analyzing trace with hash 662008565, now seen corresponding path program 2 times [2022-03-20 14:05:47,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:47,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084771100] [2022-03-20 14:05:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:47,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:05:47,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:05:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:05:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:05:47,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:47,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084771100] [2022-03-20 14:05:47,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084771100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:47,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:47,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:05:47,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:47,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1324982170] [2022-03-20 14:05:47,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1324982170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:47,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:47,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:05:47,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448718457] [2022-03-20 14:05:47,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:47,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:05:47,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:47,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:05:47,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:05:47,265 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 14:05:47,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:47,372 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-03-20 14:05:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:05:47,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 14:05:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:47,374 INFO L225 Difference]: With dead ends: 34 [2022-03-20 14:05:47,374 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 14:05:47,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:05:47,377 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:47,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 73 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:05:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 14:05:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 14:05:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:05:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-20 14:05:47,386 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-03-20 14:05:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:47,386 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-20 14:05:47,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 14:05:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-20 14:05:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 14:05:47,387 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:47,387 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:47,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 14:05:47,387 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2023221563, now seen corresponding path program 1 times [2022-03-20 14:05:47,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:47,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2097561875] [2022-03-20 14:05:47,388 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2023221563, now seen corresponding path program 2 times [2022-03-20 14:05:47,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:47,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870387338] [2022-03-20 14:05:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:47,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:47,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:47,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433515188] [2022-03-20 14:05:47,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:05:47,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:47,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:05:47,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 14:05:47,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:05:47,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:47,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:05:47,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:05:47,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:05:47,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:47,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870387338] [2022-03-20 14:05:47,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:47,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433515188] [2022-03-20 14:05:47,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433515188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:47,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:47,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:05:47,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:47,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2097561875] [2022-03-20 14:05:47,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2097561875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:47,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:47,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:05:47,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407587018] [2022-03-20 14:05:47,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:47,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:05:47,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:47,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:05:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:05:47,525 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 14:05:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:47,561 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2022-03-20 14:05:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:05:47,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-20 14:05:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:47,562 INFO L225 Difference]: With dead ends: 50 [2022-03-20 14:05:47,562 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 14:05:47,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:05:47,563 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:47,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 165 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:05:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 14:05:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-03-20 14:05:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 14:05:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-03-20 14:05:47,570 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2022-03-20 14:05:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:47,570 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-03-20 14:05:47,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 14:05:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-03-20 14:05:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 14:05:47,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:47,571 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:47,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 14:05:47,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:47,793 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:47,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1612678773, now seen corresponding path program 1 times [2022-03-20 14:05:47,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:47,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [399774491] [2022-03-20 14:05:47,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1612678773, now seen corresponding path program 2 times [2022-03-20 14:05:47,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:47,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942518879] [2022-03-20 14:05:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:47,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:47,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:47,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578474357] [2022-03-20 14:05:47,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:05:47,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:47,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:47,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:05:47,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 14:05:47,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:05:47,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:47,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:05:47,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:05:47,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:05:47,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:47,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942518879] [2022-03-20 14:05:47,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:47,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578474357] [2022-03-20 14:05:47,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578474357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:47,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:47,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:05:47,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:47,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [399774491] [2022-03-20 14:05:47,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [399774491] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:47,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:47,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:05:47,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811992353] [2022-03-20 14:05:47,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:47,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:05:47,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:47,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:05:47,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:05:47,915 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:05:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:47,950 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-03-20 14:05:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:05:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 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 22 [2022-03-20 14:05:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:47,951 INFO L225 Difference]: With dead ends: 54 [2022-03-20 14:05:47,951 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 14:05:47,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:05:47,952 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:47,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 162 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:05:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 14:05:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-03-20 14:05:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 14:05:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-03-20 14:05:47,960 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 22 [2022-03-20 14:05:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:47,960 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-03-20 14:05:47,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:05:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-03-20 14:05:47,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 14:05:47,960 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:47,961 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:47,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 14:05:48,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:48,188 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1625830715, now seen corresponding path program 1 times [2022-03-20 14:05:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:48,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1404820790] [2022-03-20 14:05:48,189 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:05:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1625830715, now seen corresponding path program 2 times [2022-03-20 14:05:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:05:48,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013828177] [2022-03-20 14:05:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:05:48,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:05:48,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:05:48,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065506767] [2022-03-20 14:05:48,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:05:48,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:48,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:05:48,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 14:05:48,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 14:05:48,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:05:48,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:05:48,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:05:48,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:05:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 14:05:48,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:05:48,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:05:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013828177] [2022-03-20 14:05:48,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:05:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065506767] [2022-03-20 14:05:48,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065506767] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:48,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:48,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:05:48,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:05:48,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1404820790] [2022-03-20 14:05:48,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1404820790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:05:48,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:05:48,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:05:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554355699] [2022-03-20 14:05:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:05:48,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:05:48,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:48,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:05:48,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:05:48,330 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-20 14:05:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:05:48,388 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2022-03-20 14:05:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:05:48,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 27 [2022-03-20 14:05:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:05:48,389 INFO L225 Difference]: With dead ends: 62 [2022-03-20 14:05:48,389 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 14:05:48,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:05:48,390 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:05:48,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:05:48,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 14:05:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-20 14:05:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 14:05:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-03-20 14:05:48,397 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2022-03-20 14:05:48,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:05:48,397 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-03-20 14:05:48,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-20 14:05:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-03-20 14:05:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 14:05:48,398 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:05:48,398 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:05:48,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 14:05:48,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:05:48,611 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:05:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:05:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1440923632, now seen corresponding path program 1 times [2022-03-20 14:05:48,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:05:48,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [294529701] [2022-03-20 14:06:47,179 WARN L232 SmtUtils]: Spent 58.28s on a formula simplification. DAG size of input: 210 DAG size of output: 204 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 14:06:47,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 5 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=2, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:06:47,194 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:06:47,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1083327145, now seen corresponding path program 1 times [2022-03-20 14:06:47,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:06:47,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381963458] [2022-03-20 14:06:47,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:06:47,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:06:47,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 14:06:47,215 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:91) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.runStrategy(AcceleratedInterpolationCore.java:300) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:289) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms at de.uni_freiburg.informatik.ultimate.logic.NoopScript.annotate(NoopScript.java:471) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.annotate(WrapperScript.java:282) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.annotate(WrapperScript.java:282) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAssertCodeBlocks.annotateAndAssertTerm(AnnotateAndAssertCodeBlocks.java:192) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAssertCodeBlocks.annotateAndAssertNonCall(AnnotateAndAssertCodeBlocks.java:109) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserter.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserter.java:101) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:313) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:211) ... 40 more [2022-03-20 14:06:47,221 INFO L158 Benchmark]: Toolchain (without parser) took 61325.44ms. Allocated memory was 231.7MB in the beginning and 296.7MB in the end (delta: 65.0MB). Free memory was 176.7MB in the beginning and 158.9MB in the end (delta: 17.8MB). Peak memory consumption was 82.4MB. Max. memory is 8.0GB. [2022-03-20 14:06:47,221 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 231.7MB. Free memory is still 192.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 14:06:47,221 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.43ms. Allocated memory was 231.7MB in the beginning and 296.7MB in the end (delta: 65.0MB). Free memory was 176.4MB in the beginning and 266.2MB in the end (delta: -89.8MB). Peak memory consumption was 8.1MB. Max. memory is 8.0GB. [2022-03-20 14:06:47,221 INFO L158 Benchmark]: Boogie Preprocessor took 17.87ms. Allocated memory is still 296.7MB. Free memory was 266.2MB in the beginning and 264.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 14:06:47,222 INFO L158 Benchmark]: RCFGBuilder took 300.91ms. Allocated memory is still 296.7MB. Free memory was 264.8MB in the beginning and 253.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 14:06:47,222 INFO L158 Benchmark]: TraceAbstraction took 60816.04ms. Allocated memory is still 296.7MB. Free memory was 253.3MB in the beginning and 158.9MB in the end (delta: 94.3MB). Peak memory consumption was 95.2MB. Max. memory is 8.0GB. [2022-03-20 14:06:47,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 231.7MB. Free memory is still 192.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 186.43ms. Allocated memory was 231.7MB in the beginning and 296.7MB in the end (delta: 65.0MB). Free memory was 176.4MB in the beginning and 266.2MB in the end (delta: -89.8MB). Peak memory consumption was 8.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.87ms. Allocated memory is still 296.7MB. Free memory was 266.2MB in the beginning and 264.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 300.91ms. Allocated memory is still 296.7MB. Free memory was 264.8MB in the beginning and 253.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 60816.04ms. Allocated memory is still 296.7MB. Free memory was 253.3MB in the beginning and 158.9MB in the end (delta: 94.3MB). Peak memory consumption was 95.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-20 14:06:47,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...