/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:25:35,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:25:35,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:25:35,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 23:25:35,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 23:25:35,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 23:25:35,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 23:25:35,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 23:25:35,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 23:25:35,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 23:25:35,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 23:25:35,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 23:25:35,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:25:35,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:25:35,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:25:35,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:25:35,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:25:35,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:25:35,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:25:35,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:25:35,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:25:35,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:25:35,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:25:35,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:25:35,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 23:25:35,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:25:35,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:25:35,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:25:35,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:25:35,941 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:25:35,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:25:35,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:25:35,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:25:35,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:25:35,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:25:35,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:25:35,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:25:35,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:25:35,943 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:25:35,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:25:35,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:25:35,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:25:35,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:25:35,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:25:35,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:25:35,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:25:35,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:25:35,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:25:35,945 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:25:35,945 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:25:36,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:25:36,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:25:36,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:25:36,114 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:25:36,117 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:25:36,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c [2022-01-31 23:25:36,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f27493e3c/2c49b7bc305e413f8f1a829cc11b0d2e/FLAGc68e1f7f9 [2022-01-31 23:25:36,508 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:25:36,508 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c [2022-01-31 23:25:36,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f27493e3c/2c49b7bc305e413f8f1a829cc11b0d2e/FLAGc68e1f7f9 [2022-01-31 23:25:36,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f27493e3c/2c49b7bc305e413f8f1a829cc11b0d2e [2022-01-31 23:25:36,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:25:36,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:25:36,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:25:36,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:25:36,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:25:36,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:25:36" (1/1) ... [2022-01-31 23:25:36,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da87fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:36, skipping insertion in model container [2022-01-31 23:25:36,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:25:36" (1/1) ... [2022-01-31 23:25:36,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:25:36,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:25:36,690 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c[4997,5010] [2022-01-31 23:25:36,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:25:36,761 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:25:36,777 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c[4997,5010] [2022-01-31 23:25:36,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:25:36,842 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:25:36,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:36 WrapperNode [2022-01-31 23:25:36,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:25:36,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:25:36,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:25:36,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:25:36,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:36" (1/1) ... [2022-01-31 23:25:36,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:36" (1/1) ... [2022-01-31 23:25:36,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:36" (1/1) ... [2022-01-31 23:25:36,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:36" (1/1) ... [2022-01-31 23:25:36,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:36" (1/1) ... [2022-01-31 23:25:36,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:36" (1/1) ... [2022-01-31 23:25:36,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:36" (1/1) ... [2022-01-31 23:25:36,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:25:36,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:25:36,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:25:36,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:25:36,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:36" (1/1) ... [2022-01-31 23:25:36,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:25:36,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:25:36,995 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) [2022-01-31 23:25:37,004 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 [2022-01-31 23:25:37,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:25:37,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:25:37,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:25:37,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:25:37,026 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_func_def_resp_len [2022-01-31 23:25:37,026 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_is_naa5 [2022-01-31 23:25:37,026 INFO L138 BoogieDeclarations]: Found implementation of procedure dStrHex [2022-01-31 23:25:37,027 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_num [2022-01-31 23:25:37,027 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_llnum [2022-01-31 23:25:37,027 INFO L138 BoogieDeclarations]: Found implementation of procedure do_discover_list [2022-01-31 23:25:37,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:25:37,028 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-01-31 23:25:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:25:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:25:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:25:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:25:37,028 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 23:25:37,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:25:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-01-31 23:25:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2022-01-31 23:25:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2022-01-31 23:25:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2022-01-31 23:25:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-01-31 23:25:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-01-31 23:25:37,031 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure getopt_long [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure smp_initiator_open [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_func_def_resp_len [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure smp_is_naa5 [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure dStrHex [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_num [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_llnum [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure do_discover_list [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure main6 [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure toupper [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:25:37,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:25:37,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 23:25:37,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:25:37,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-01-31 23:25:37,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:25:37,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:25:37,033 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:25:37,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 23:25:37,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:25:37,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:25:37,218 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:25:37,219 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:25:37,850 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:25:37,855 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:25:37,855 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 23:25:37,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:25:37 BoogieIcfgContainer [2022-01-31 23:25:37,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:25:37,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:25:37,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:25:37,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:25:37,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:25:36" (1/3) ... [2022-01-31 23:25:37,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44391a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:25:37, skipping insertion in model container [2022-01-31 23:25:37,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:25:36" (2/3) ... [2022-01-31 23:25:37,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44391a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:25:37, skipping insertion in model container [2022-01-31 23:25:37,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:25:37" (3/3) ... [2022-01-31 23:25:37,862 INFO L111 eAbstractionObserver]: Analyzing ICFG discover_list.c [2022-01-31 23:25:37,866 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:25:37,866 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:25:37,893 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:25:37,897 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=QVASR [2022-01-31 23:25:37,898 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:25:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 71 states have internal predecessors, (103), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 23:25:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 23:25:37,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:37,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:37,914 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:37,918 INFO L85 PathProgramCache]: Analyzing trace with hash 467458188, now seen corresponding path program 1 times [2022-01-31 23:25:37,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:37,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875035722] [2022-01-31 23:25:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:37,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:37,970 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:38,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:38,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:38,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 23:25:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:25:38,285 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:38,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875035722] [2022-01-31 23:25:38,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [875035722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:38,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:38,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 23:25:38,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023597733] [2022-01-31 23:25:38,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:38,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 23:25:38,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:38,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 23:25:38,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 23:25:38,316 INFO L87 Difference]: Start difference. First operand has 91 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 71 states have internal predecessors, (103), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:38,757 INFO L93 Difference]: Finished difference Result 227 states and 347 transitions. [2022-01-31 23:25:38,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:25:38,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-01-31 23:25:38,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:38,765 INFO L225 Difference]: With dead ends: 227 [2022-01-31 23:25:38,766 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 23:25:38,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:25:38,770 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 202 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:38,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 141 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:25:38,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 23:25:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2022-01-31 23:25:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2022-01-31 23:25:38,804 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 46 [2022-01-31 23:25:38,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:38,805 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2022-01-31 23:25:38,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:38,805 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2022-01-31 23:25:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 23:25:38,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:38,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:38,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:25:38,807 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:38,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1776525110, now seen corresponding path program 1 times [2022-01-31 23:25:38,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:38,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188014820] [2022-01-31 23:25:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:38,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:38,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:38,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:38,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:38,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 23:25:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:38,929 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:38,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188014820] [2022-01-31 23:25:38,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1188014820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:38,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:38,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:25:38,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624619720] [2022-01-31 23:25:38,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:38,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:25:38,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:25:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:25:38,931 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:39,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:39,205 INFO L93 Difference]: Finished difference Result 140 states and 184 transitions. [2022-01-31 23:25:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:25:39,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-01-31 23:25:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:39,209 INFO L225 Difference]: With dead ends: 140 [2022-01-31 23:25:39,209 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 23:25:39,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:25:39,215 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 85 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:39,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 126 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:25:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 23:25:39,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2022-01-31 23:25:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 59 states have internal predecessors, (76), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2022-01-31 23:25:39,235 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 46 [2022-01-31 23:25:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:39,236 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2022-01-31 23:25:39,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2022-01-31 23:25:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 23:25:39,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:39,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:39,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:25:39,239 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1831279328, now seen corresponding path program 1 times [2022-01-31 23:25:39,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:39,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770516326] [2022-01-31 23:25:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:39,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:39,248 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:39,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:39,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:39,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:25:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:39,427 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:39,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770516326] [2022-01-31 23:25:39,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770516326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:39,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:39,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:25:39,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169691279] [2022-01-31 23:25:39,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:39,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:25:39,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:39,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:25:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:25:39,429 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:39,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:39,775 INFO L93 Difference]: Finished difference Result 142 states and 186 transitions. [2022-01-31 23:25:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:25:39,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-01-31 23:25:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:39,777 INFO L225 Difference]: With dead ends: 142 [2022-01-31 23:25:39,777 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 23:25:39,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:25:39,778 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:39,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 143 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:25:39,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 23:25:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2022-01-31 23:25:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2022-01-31 23:25:39,786 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 48 [2022-01-31 23:25:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:39,786 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2022-01-31 23:25:39,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2022-01-31 23:25:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 23:25:39,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:39,787 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:39,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:25:39,787 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash -110265974, now seen corresponding path program 2 times [2022-01-31 23:25:39,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:39,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44578356] [2022-01-31 23:25:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:39,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:39,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:39,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:39,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:39,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 23:25:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:39,958 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:39,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44578356] [2022-01-31 23:25:39,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [44578356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:39,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:39,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 23:25:39,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703437372] [2022-01-31 23:25:39,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:39,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 23:25:39,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:39,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 23:25:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 23:25:39,960 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:40,333 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-01-31 23:25:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:25:40,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-01-31 23:25:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:40,335 INFO L225 Difference]: With dead ends: 144 [2022-01-31 23:25:40,335 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 23:25:40,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:25:40,336 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:40,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 160 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:25:40,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 23:25:40,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2022-01-31 23:25:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2022-01-31 23:25:40,347 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 50 [2022-01-31 23:25:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:40,348 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2022-01-31 23:25:40,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:40,350 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2022-01-31 23:25:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 23:25:40,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:40,354 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:40,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:25:40,355 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:40,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -523287008, now seen corresponding path program 3 times [2022-01-31 23:25:40,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:40,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627503589] [2022-01-31 23:25:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:40,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:40,359 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:40,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:40,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:40,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:25:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:40,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:40,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627503589] [2022-01-31 23:25:40,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627503589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:40,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:40,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:25:40,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44379331] [2022-01-31 23:25:40,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:40,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:25:40,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:40,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:25:40,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:25:40,538 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:40,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:40,955 INFO L93 Difference]: Finished difference Result 146 states and 190 transitions. [2022-01-31 23:25:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:25:40,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-01-31 23:25:40,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:40,956 INFO L225 Difference]: With dead ends: 146 [2022-01-31 23:25:40,956 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 23:25:40,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:25:40,957 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:40,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 177 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:25:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 23:25:40,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-01-31 23:25:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2022-01-31 23:25:40,965 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 52 [2022-01-31 23:25:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:40,965 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2022-01-31 23:25:40,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2022-01-31 23:25:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 23:25:40,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:40,966 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:40,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 23:25:40,966 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:40,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1966742966, now seen corresponding path program 4 times [2022-01-31 23:25:40,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:40,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155429229] [2022-01-31 23:25:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:40,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:40,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:41,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:41,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:41,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 23:25:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:41,166 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:41,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155429229] [2022-01-31 23:25:41,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [155429229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:41,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:41,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:25:41,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103103819] [2022-01-31 23:25:41,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:41,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:25:41,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:41,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:25:41,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:25:41,168 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:41,644 INFO L93 Difference]: Finished difference Result 148 states and 192 transitions. [2022-01-31 23:25:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:25:41,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-01-31 23:25:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:41,645 INFO L225 Difference]: With dead ends: 148 [2022-01-31 23:25:41,646 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 23:25:41,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:25:41,647 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:41,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 194 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:25:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 23:25:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-01-31 23:25:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2022-01-31 23:25:41,654 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 54 [2022-01-31 23:25:41,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:41,654 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2022-01-31 23:25:41,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:41,654 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2022-01-31 23:25:41,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 23:25:41,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:41,659 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:41,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 23:25:41,660 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:41,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:41,660 INFO L85 PathProgramCache]: Analyzing trace with hash -127655584, now seen corresponding path program 5 times [2022-01-31 23:25:41,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:41,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014707447] [2022-01-31 23:25:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:41,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:41,662 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:41,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:41,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:41,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:25:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:41,878 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014707447] [2022-01-31 23:25:41,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2014707447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:41,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:41,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 23:25:41,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908332974] [2022-01-31 23:25:41,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:41,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 23:25:41,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 23:25:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:25:41,880 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:42,369 INFO L93 Difference]: Finished difference Result 150 states and 194 transitions. [2022-01-31 23:25:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:25:42,370 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-01-31 23:25:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:42,371 INFO L225 Difference]: With dead ends: 150 [2022-01-31 23:25:42,371 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 23:25:42,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:25:42,372 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:42,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 194 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:25:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 23:25:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2022-01-31 23:25:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-01-31 23:25:42,379 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 56 [2022-01-31 23:25:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:42,379 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-01-31 23:25:42,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:42,379 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-01-31 23:25:42,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 23:25:42,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:42,380 INFO L514 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:42,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 23:25:42,380 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash -330196214, now seen corresponding path program 6 times [2022-01-31 23:25:42,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:42,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214162389] [2022-01-31 23:25:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:42,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:42,382 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:42,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:42,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:42,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 23:25:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:42,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:42,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214162389] [2022-01-31 23:25:42,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214162389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:42,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:42,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:25:42,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261061882] [2022-01-31 23:25:42,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:42,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:25:42,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:42,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:25:42,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:25:42,620 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:43,012 INFO L93 Difference]: Finished difference Result 152 states and 196 transitions. [2022-01-31 23:25:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:25:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-01-31 23:25:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:43,014 INFO L225 Difference]: With dead ends: 152 [2022-01-31 23:25:43,014 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 23:25:43,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:25:43,015 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:43,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 143 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:25:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 23:25:43,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2022-01-31 23:25:43,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-01-31 23:25:43,032 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 58 [2022-01-31 23:25:43,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:43,032 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-01-31 23:25:43,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:43,032 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-01-31 23:25:43,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 23:25:43,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:43,033 INFO L514 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:43,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 23:25:43,033 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:43,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1036407648, now seen corresponding path program 7 times [2022-01-31 23:25:43,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:43,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128303817] [2022-01-31 23:25:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:43,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:43,035 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:43,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:43,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:43,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:25:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:43,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:43,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128303817] [2022-01-31 23:25:43,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1128303817] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:43,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:43,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:25:43,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505101983] [2022-01-31 23:25:43,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:43,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:25:43,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:43,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:25:43,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:25:43,280 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:43,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:43,754 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2022-01-31 23:25:43,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 23:25:43,754 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-01-31 23:25:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:43,755 INFO L225 Difference]: With dead ends: 154 [2022-01-31 23:25:43,755 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 23:25:43,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-31 23:25:43,756 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:43,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 143 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:25:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 23:25:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-01-31 23:25:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-01-31 23:25:43,762 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 60 [2022-01-31 23:25:43,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:43,762 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-01-31 23:25:43,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:43,763 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-01-31 23:25:43,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 23:25:43,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:43,763 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:43,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 23:25:43,763 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:43,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2059623478, now seen corresponding path program 8 times [2022-01-31 23:25:43,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:43,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341962950] [2022-01-31 23:25:43,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:43,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:43,766 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:43,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:43,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:44,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 23:25:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:44,045 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:44,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341962950] [2022-01-31 23:25:44,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1341962950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:44,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:44,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 23:25:44,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041106938] [2022-01-31 23:25:44,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:44,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 23:25:44,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:44,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 23:25:44,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:25:44,047 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:44,627 INFO L93 Difference]: Finished difference Result 156 states and 200 transitions. [2022-01-31 23:25:44,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:25:44,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-01-31 23:25:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:44,629 INFO L225 Difference]: With dead ends: 156 [2022-01-31 23:25:44,629 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 23:25:44,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-31 23:25:44,630 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:44,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 177 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:25:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 23:25:44,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2022-01-31 23:25:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:44,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-01-31 23:25:44,636 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 62 [2022-01-31 23:25:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:44,636 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-01-31 23:25:44,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:44,637 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-01-31 23:25:44,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 23:25:44,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:44,637 INFO L514 BasicCegarLoop]: trace histogram [18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:44,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 23:25:44,637 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:44,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1482430496, now seen corresponding path program 9 times [2022-01-31 23:25:44,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:44,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30120409] [2022-01-31 23:25:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:44,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:44,640 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:44,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:44,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:44,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:25:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:44,933 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30120409] [2022-01-31 23:25:44,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [30120409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:44,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:44,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:25:44,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906459051] [2022-01-31 23:25:44,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:44,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:25:44,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:44,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:25:44,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:25:44,935 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:45,598 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2022-01-31 23:25:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:25:45,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-01-31 23:25:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:45,599 INFO L225 Difference]: With dead ends: 158 [2022-01-31 23:25:45,599 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 23:25:45,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-31 23:25:45,600 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:45,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 194 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:25:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 23:25:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-01-31 23:25:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.25) internal successors, (85), 68 states have internal predecessors, (85), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-01-31 23:25:45,606 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 64 [2022-01-31 23:25:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:45,606 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-01-31 23:25:45,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-01-31 23:25:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 23:25:45,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:45,607 INFO L514 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:45,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 23:25:45,607 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:45,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:45,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1102249098, now seen corresponding path program 10 times [2022-01-31 23:25:45,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:45,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782601059] [2022-01-31 23:25:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:45,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:45,610 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:45,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:45,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:45,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 23:25:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:45,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:45,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782601059] [2022-01-31 23:25:45,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1782601059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:45,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:45,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:25:45,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146530231] [2022-01-31 23:25:45,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:45,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:25:45,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:45,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:25:45,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:25:45,940 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:46,759 INFO L93 Difference]: Finished difference Result 160 states and 204 transitions. [2022-01-31 23:25:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 23:25:46,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-01-31 23:25:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:46,760 INFO L225 Difference]: With dead ends: 160 [2022-01-31 23:25:46,760 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 23:25:46,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:25:46,761 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:46,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 262 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:25:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 23:25:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2022-01-31 23:25:46,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2022-01-31 23:25:46,767 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 66 [2022-01-31 23:25:46,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:46,767 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2022-01-31 23:25:46,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2022-01-31 23:25:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 23:25:46,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:46,768 INFO L514 BasicCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:46,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 23:25:46,768 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:46,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:46,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1393110240, now seen corresponding path program 11 times [2022-01-31 23:25:46,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:46,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81493044] [2022-01-31 23:25:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:46,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:46,771 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:46,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:46,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:47,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:25:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:47,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:47,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81493044] [2022-01-31 23:25:47,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [81493044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:47,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:47,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 23:25:47,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668155544] [2022-01-31 23:25:47,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:47,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 23:25:47,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:47,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 23:25:47,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:25:47,138 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:48,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:48,026 INFO L93 Difference]: Finished difference Result 162 states and 206 transitions. [2022-01-31 23:25:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 23:25:48,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-01-31 23:25:48,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:48,027 INFO L225 Difference]: With dead ends: 162 [2022-01-31 23:25:48,027 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 23:25:48,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-01-31 23:25:48,041 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:48,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 262 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:25:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 23:25:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-01-31 23:25:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:48,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2022-01-31 23:25:48,047 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 68 [2022-01-31 23:25:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:48,048 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2022-01-31 23:25:48,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2022-01-31 23:25:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 23:25:48,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:48,049 INFO L514 BasicCegarLoop]: trace histogram [24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:48,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 23:25:48,049 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:48,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1390454090, now seen corresponding path program 12 times [2022-01-31 23:25:48,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:48,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783262363] [2022-01-31 23:25:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:48,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:48,052 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:48,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:48,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:48,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 23:25:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:48,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:48,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783262363] [2022-01-31 23:25:48,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [783262363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:48,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:48,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:25:48,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082055479] [2022-01-31 23:25:48,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:48,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:25:48,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:25:48,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:25:48,458 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:49,566 INFO L93 Difference]: Finished difference Result 164 states and 208 transitions. [2022-01-31 23:25:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:25:49,566 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 70 [2022-01-31 23:25:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:49,567 INFO L225 Difference]: With dead ends: 164 [2022-01-31 23:25:49,567 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 23:25:49,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 23:25:49,568 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:49,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 313 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:25:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 23:25:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-01-31 23:25:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2022-01-31 23:25:49,574 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 70 [2022-01-31 23:25:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:49,574 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2022-01-31 23:25:49,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2022-01-31 23:25:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 23:25:49,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:49,575 INFO L514 BasicCegarLoop]: trace histogram [26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:49,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 23:25:49,575 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:49,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:49,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1316589984, now seen corresponding path program 13 times [2022-01-31 23:25:49,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:49,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908136175] [2022-01-31 23:25:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:49,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:49,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:49,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:49,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:50,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:25:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:50,111 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:50,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908136175] [2022-01-31 23:25:50,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [908136175] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:50,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:50,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:25:50,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693029145] [2022-01-31 23:25:50,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:50,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:25:50,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:50,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:25:50,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:25:50,112 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:51,137 INFO L93 Difference]: Finished difference Result 166 states and 210 transitions. [2022-01-31 23:25:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:25:51,138 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 72 [2022-01-31 23:25:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:51,138 INFO L225 Difference]: With dead ends: 166 [2022-01-31 23:25:51,139 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 23:25:51,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 23:25:51,139 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:51,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 245 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:25:51,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 23:25:51,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-01-31 23:25:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2022-01-31 23:25:51,146 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 72 [2022-01-31 23:25:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:51,146 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2022-01-31 23:25:51,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2022-01-31 23:25:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 23:25:51,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:51,146 INFO L514 BasicCegarLoop]: trace histogram [28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:51,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 23:25:51,147 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash -286155254, now seen corresponding path program 14 times [2022-01-31 23:25:51,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:51,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154501750] [2022-01-31 23:25:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:51,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:51,149 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:51,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:51,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:51,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 23:25:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:51,810 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:51,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154501750] [2022-01-31 23:25:51,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [154501750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:51,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:51,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:25:51,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953129647] [2022-01-31 23:25:51,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:51,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:25:51,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:51,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:25:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:25:51,812 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:53,005 INFO L93 Difference]: Finished difference Result 168 states and 212 transitions. [2022-01-31 23:25:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 23:25:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 74 [2022-01-31 23:25:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:53,006 INFO L225 Difference]: With dead ends: 168 [2022-01-31 23:25:53,007 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 23:25:53,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:25:53,009 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:53,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 296 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:25:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 23:25:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-01-31 23:25:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:53,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-01-31 23:25:53,015 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 74 [2022-01-31 23:25:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:53,015 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-01-31 23:25:53,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-01-31 23:25:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 23:25:53,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:53,016 INFO L514 BasicCegarLoop]: trace histogram [30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:53,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 23:25:53,016 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1348028000, now seen corresponding path program 15 times [2022-01-31 23:25:53,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:53,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599965688] [2022-01-31 23:25:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:53,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:53,018 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:53,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:53,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:25:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:53,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:53,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599965688] [2022-01-31 23:25:53,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [599965688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:53,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:53,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:25:53,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533195595] [2022-01-31 23:25:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:53,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:25:53,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:53,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:25:53,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:25:53,652 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:54,737 INFO L93 Difference]: Finished difference Result 170 states and 214 transitions. [2022-01-31 23:25:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 23:25:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 76 [2022-01-31 23:25:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:54,738 INFO L225 Difference]: With dead ends: 170 [2022-01-31 23:25:54,738 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 23:25:54,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:25:54,740 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:54,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 194 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:25:54,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 23:25:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-01-31 23:25:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 74 states have internal predecessors, (91), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2022-01-31 23:25:54,745 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 76 [2022-01-31 23:25:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:54,746 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2022-01-31 23:25:54,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2022-01-31 23:25:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 23:25:54,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:54,746 INFO L514 BasicCegarLoop]: trace histogram [32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:54,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 23:25:54,746 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:54,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:54,747 INFO L85 PathProgramCache]: Analyzing trace with hash 286385866, now seen corresponding path program 16 times [2022-01-31 23:25:54,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:54,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585954334] [2022-01-31 23:25:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:54,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:54,749 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:54,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:54,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:55,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 23:25:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:55,573 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:55,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585954334] [2022-01-31 23:25:55,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [585954334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:55,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:55,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 23:25:55,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417934253] [2022-01-31 23:25:55,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:55,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 23:25:55,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:55,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 23:25:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:25:55,575 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:56,856 INFO L93 Difference]: Finished difference Result 172 states and 216 transitions. [2022-01-31 23:25:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 23:25:56,856 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 78 [2022-01-31 23:25:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:56,857 INFO L225 Difference]: With dead ends: 172 [2022-01-31 23:25:56,857 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 23:25:56,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 23:25:56,858 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:56,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 160 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:25:56,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 23:25:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2022-01-31 23:25:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 75 states have internal predecessors, (92), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2022-01-31 23:25:56,876 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 78 [2022-01-31 23:25:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:56,877 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2022-01-31 23:25:56,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2022-01-31 23:25:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 23:25:56,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:56,879 INFO L514 BasicCegarLoop]: trace histogram [34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:56,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 23:25:56,880 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:56,880 INFO L85 PathProgramCache]: Analyzing trace with hash -55855904, now seen corresponding path program 17 times [2022-01-31 23:25:56,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:56,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365636694] [2022-01-31 23:25:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:56,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:56,883 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:56,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:56,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:57,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:25:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:25:57,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:57,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365636694] [2022-01-31 23:25:57,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1365636694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:57,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:57,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 23:25:57,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29294396] [2022-01-31 23:25:57,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:57,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 23:25:57,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:57,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 23:25:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-01-31 23:25:57,862 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:59,488 INFO L93 Difference]: Finished difference Result 174 states and 218 transitions. [2022-01-31 23:25:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 23:25:59,488 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 80 [2022-01-31 23:25:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:59,489 INFO L225 Difference]: With dead ends: 174 [2022-01-31 23:25:59,489 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 23:25:59,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 23:25:59,490 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:59,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 262 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:25:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 23:25:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2022-01-31 23:25:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 76 states have internal predecessors, (93), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:25:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-01-31 23:25:59,496 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 80 [2022-01-31 23:25:59,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:59,496 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-01-31 23:25:59,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:25:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-01-31 23:25:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 23:25:59,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:59,496 INFO L514 BasicCegarLoop]: trace histogram [36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:59,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 23:25:59,497 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:59,497 INFO L85 PathProgramCache]: Analyzing trace with hash 963477386, now seen corresponding path program 18 times [2022-01-31 23:25:59,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:59,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496685065] [2022-01-31 23:25:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:59,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:59,499 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:59,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:59,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:25:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:00,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 23:26:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:26:00,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:26:00,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496685065] [2022-01-31 23:26:00,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1496685065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:26:00,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:26:00,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 23:26:00,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370859050] [2022-01-31 23:26:00,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:26:00,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 23:26:00,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:26:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 23:26:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-01-31 23:26:00,774 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 22 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:26:02,259 INFO L93 Difference]: Finished difference Result 176 states and 220 transitions. [2022-01-31 23:26:02,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 23:26:02,260 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 22 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 82 [2022-01-31 23:26:02,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:26:02,260 INFO L225 Difference]: With dead ends: 176 [2022-01-31 23:26:02,260 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 23:26:02,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=184, Invalid=1796, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:26:02,262 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:26:02,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 143 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:26:02,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 23:26:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-01-31 23:26:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 77 states have internal predecessors, (94), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:26:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2022-01-31 23:26:02,268 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 82 [2022-01-31 23:26:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:26:02,268 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2022-01-31 23:26:02,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 22 states have internal predecessors, (55), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:02,268 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2022-01-31 23:26:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 23:26:02,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:26:02,269 INFO L514 BasicCegarLoop]: trace histogram [38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:26:02,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 23:26:02,269 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:26:02,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:26:02,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1997971424, now seen corresponding path program 19 times [2022-01-31 23:26:02,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:26:02,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294391864] [2022-01-31 23:26:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:26:02,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:26:02,272 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:26:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:02,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:26:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:02,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:26:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:03,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:26:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:26:03,545 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:26:03,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294391864] [2022-01-31 23:26:03,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [294391864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:26:03,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:26:03,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 23:26:03,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331074482] [2022-01-31 23:26:03,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:26:03,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 23:26:03,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:26:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 23:26:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-31 23:26:03,547 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:26:05,706 INFO L93 Difference]: Finished difference Result 178 states and 222 transitions. [2022-01-31 23:26:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 23:26:05,706 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 84 [2022-01-31 23:26:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:26:05,707 INFO L225 Difference]: With dead ends: 178 [2022-01-31 23:26:05,707 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 23:26:05,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 23:26:05,708 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:26:05,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 245 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:26:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 23:26:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-01-31 23:26:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 78 states have internal predecessors, (95), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:26:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-01-31 23:26:05,714 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 84 [2022-01-31 23:26:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:26:05,714 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-01-31 23:26:05,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-01-31 23:26:05,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 23:26:05,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:26:05,714 INFO L514 BasicCegarLoop]: trace histogram [40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:26:05,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 23:26:05,715 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:26:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:26:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash 758147146, now seen corresponding path program 20 times [2022-01-31 23:26:05,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:26:05,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41696767] [2022-01-31 23:26:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:26:05,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:26:05,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:26:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:05,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:26:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:05,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:26:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:07,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 23:26:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:26:07,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:26:07,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41696767] [2022-01-31 23:26:07,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [41696767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:26:07,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:26:07,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 23:26:07,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068059068] [2022-01-31 23:26:07,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:26:07,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 23:26:07,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:26:07,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 23:26:07,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-01-31 23:26:07,471 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:09,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:26:09,820 INFO L93 Difference]: Finished difference Result 180 states and 224 transitions. [2022-01-31 23:26:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 23:26:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 86 [2022-01-31 23:26:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:26:09,821 INFO L225 Difference]: With dead ends: 180 [2022-01-31 23:26:09,821 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 23:26:09,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 23:26:09,823 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:26:09,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 194 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:26:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 23:26:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2022-01-31 23:26:09,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:26:09,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2022-01-31 23:26:09,829 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 86 [2022-01-31 23:26:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:26:09,829 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2022-01-31 23:26:09,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2022-01-31 23:26:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 23:26:09,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:26:09,830 INFO L514 BasicCegarLoop]: trace histogram [42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:26:09,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 23:26:09,830 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:26:09,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:26:09,830 INFO L85 PathProgramCache]: Analyzing trace with hash 531872608, now seen corresponding path program 21 times [2022-01-31 23:26:09,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:26:09,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707850625] [2022-01-31 23:26:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:26:09,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:26:09,833 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:26:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:09,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:26:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:09,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:26:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:11,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:26:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:26:11,931 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:26:11,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707850625] [2022-01-31 23:26:11,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1707850625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:26:11,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:26:11,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 23:26:11,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892802920] [2022-01-31 23:26:11,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:26:11,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 23:26:11,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:26:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 23:26:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-01-31 23:26:11,932 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:26:14,621 INFO L93 Difference]: Finished difference Result 182 states and 226 transitions. [2022-01-31 23:26:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 23:26:14,621 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 88 [2022-01-31 23:26:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:26:14,622 INFO L225 Difference]: With dead ends: 182 [2022-01-31 23:26:14,622 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 23:26:14,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=211, Invalid=2339, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 23:26:14,623 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:26:14,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 177 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:26:14,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 23:26:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-01-31 23:26:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:26:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2022-01-31 23:26:14,629 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 88 [2022-01-31 23:26:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:26:14,629 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2022-01-31 23:26:14,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2022-01-31 23:26:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 23:26:14,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:26:14,630 INFO L514 BasicCegarLoop]: trace histogram [44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:26:14,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 23:26:14,630 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:26:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:26:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1232690934, now seen corresponding path program 22 times [2022-01-31 23:26:14,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:26:14,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916186818] [2022-01-31 23:26:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:26:14,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:26:14,634 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:26:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:14,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:26:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:14,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:26:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:17,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 23:26:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:26:17,028 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:26:17,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916186818] [2022-01-31 23:26:17,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [916186818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:26:17,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:26:17,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 23:26:17,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096666576] [2022-01-31 23:26:17,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:26:17,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 23:26:17,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:26:17,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 23:26:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:26:17,029 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:26:20,602 INFO L93 Difference]: Finished difference Result 184 states and 228 transitions. [2022-01-31 23:26:20,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 23:26:20,602 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 90 [2022-01-31 23:26:20,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:26:20,603 INFO L225 Difference]: With dead ends: 184 [2022-01-31 23:26:20,603 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 23:26:20,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=220, Invalid=2536, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 23:26:20,604 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:26:20,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 364 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:26:20,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 23:26:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2022-01-31 23:26:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 81 states have internal predecessors, (98), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:26:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2022-01-31 23:26:20,610 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 90 [2022-01-31 23:26:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:26:20,610 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2022-01-31 23:26:20,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2022-01-31 23:26:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 23:26:20,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:26:20,611 INFO L514 BasicCegarLoop]: trace histogram [46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:26:20,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 23:26:20,611 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:26:20,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:26:20,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1486960992, now seen corresponding path program 23 times [2022-01-31 23:26:20,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:26:20,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765714808] [2022-01-31 23:26:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:26:20,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:26:20,614 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:26:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:20,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:26:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:20,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:26:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:23,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:26:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:26:23,704 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:26:23,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765714808] [2022-01-31 23:26:23,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765714808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:26:23,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:26:23,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 23:26:23,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109964855] [2022-01-31 23:26:23,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:26:23,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 23:26:23,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:26:23,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 23:26:23,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:26:23,706 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:26:28,861 INFO L93 Difference]: Finished difference Result 186 states and 230 transitions. [2022-01-31 23:26:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 23:26:28,861 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 92 [2022-01-31 23:26:28,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:26:28,862 INFO L225 Difference]: With dead ends: 186 [2022-01-31 23:26:28,862 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 23:26:28,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=229, Invalid=2741, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 23:26:28,863 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:26:28,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 483 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:26:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 23:26:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-01-31 23:26:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:26:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2022-01-31 23:26:28,870 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 92 [2022-01-31 23:26:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:26:28,870 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2022-01-31 23:26:28,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2022-01-31 23:26:28,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 23:26:28,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:26:28,870 INFO L514 BasicCegarLoop]: trace histogram [48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:26:28,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 23:26:28,871 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:26:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:26:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1687955914, now seen corresponding path program 24 times [2022-01-31 23:26:28,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:26:28,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634648874] [2022-01-31 23:26:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:26:28,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:26:28,874 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:26:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:26:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:28,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:26:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:33,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 23:26:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:26:33,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:26:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634648874] [2022-01-31 23:26:33,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [634648874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:26:33,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:26:33,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 23:26:33,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915351737] [2022-01-31 23:26:33,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:26:33,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 23:26:33,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:26:33,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 23:26:33,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:26:33,733 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:39,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:26:39,241 INFO L93 Difference]: Finished difference Result 188 states and 232 transitions. [2022-01-31 23:26:39,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 23:26:39,242 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 94 [2022-01-31 23:26:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:26:39,243 INFO L225 Difference]: With dead ends: 188 [2022-01-31 23:26:39,243 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 23:26:39,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=238, Invalid=2954, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 23:26:39,244 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:26:39,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 228 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:26:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 23:26:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-01-31 23:26:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:26:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2022-01-31 23:26:39,254 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 94 [2022-01-31 23:26:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:26:39,255 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2022-01-31 23:26:39,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2022-01-31 23:26:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 23:26:39,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:26:39,255 INFO L514 BasicCegarLoop]: trace histogram [50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:26:39,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 23:26:39,256 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:26:39,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:26:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1631486432, now seen corresponding path program 25 times [2022-01-31 23:26:39,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:26:39,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769744455] [2022-01-31 23:26:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:26:39,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:26:39,259 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:26:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:39,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:26:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:39,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:26:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:45,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:26:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:26:45,795 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:26:45,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769744455] [2022-01-31 23:26:45,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1769744455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:26:45,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:26:45,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 23:26:45,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107206076] [2022-01-31 23:26:45,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:26:45,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 23:26:45,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:26:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 23:26:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2022-01-31 23:26:45,797 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:26:54,009 INFO L93 Difference]: Finished difference Result 190 states and 234 transitions. [2022-01-31 23:26:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 23:26:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 96 [2022-01-31 23:26:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:26:54,011 INFO L225 Difference]: With dead ends: 190 [2022-01-31 23:26:54,011 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 23:26:54,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=247, Invalid=3175, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 23:26:54,012 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:26:54,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 381 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:26:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 23:26:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2022-01-31 23:26:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:26:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2022-01-31 23:26:54,018 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 96 [2022-01-31 23:26:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:26:54,018 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2022-01-31 23:26:54,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:26:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2022-01-31 23:26:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 23:26:54,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:26:54,019 INFO L514 BasicCegarLoop]: trace histogram [52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:26:54,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 23:26:54,019 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:26:54,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:26:54,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1268581002, now seen corresponding path program 26 times [2022-01-31 23:26:54,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:26:54,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743178488] [2022-01-31 23:26:54,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:26:54,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:26:54,023 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:26:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:54,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:26:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:26:54,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:26:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:27:01,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 23:27:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:27:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:27:01,316 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:27:01,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743178488] [2022-01-31 23:27:01,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [743178488] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:27:01,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:27:01,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 23:27:01,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529264128] [2022-01-31 23:27:01,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:27:01,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 23:27:01,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:27:01,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 23:27:01,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:27:01,317 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:27:14,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:27:14,527 INFO L93 Difference]: Finished difference Result 192 states and 236 transitions. [2022-01-31 23:27:14,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 23:27:14,527 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 98 [2022-01-31 23:27:14,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:27:14,528 INFO L225 Difference]: With dead ends: 192 [2022-01-31 23:27:14,528 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 23:27:14,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=256, Invalid=3404, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 23:27:14,529 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 2342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:27:14,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 398 Invalid, 2342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 23:27:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 23:27:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-01-31 23:27:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:27:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2022-01-31 23:27:14,536 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 98 [2022-01-31 23:27:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:27:14,536 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2022-01-31 23:27:14,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:27:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2022-01-31 23:27:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 23:27:14,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:27:14,536 INFO L514 BasicCegarLoop]: trace histogram [54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:27:14,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 23:27:14,537 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:27:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:27:14,537 INFO L85 PathProgramCache]: Analyzing trace with hash 698805536, now seen corresponding path program 27 times [2022-01-31 23:27:14,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:27:14,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500629848] [2022-01-31 23:27:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:27:14,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:27:14,540 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:27:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:27:14,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:27:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:27:14,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:27:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:27:26,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:27:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:27:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:27:26,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:27:26,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500629848] [2022-01-31 23:27:26,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [500629848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:27:26,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:27:26,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 23:27:26,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101055406] [2022-01-31 23:27:26,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:27:26,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 23:27:26,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:27:26,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 23:27:26,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 23:27:26,947 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:27:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:27:38,965 INFO L93 Difference]: Finished difference Result 194 states and 238 transitions. [2022-01-31 23:27:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 23:27:38,966 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 100 [2022-01-31 23:27:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:27:38,966 INFO L225 Difference]: With dead ends: 194 [2022-01-31 23:27:38,966 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 23:27:38,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=265, Invalid=3641, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 23:27:38,968 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:27:38,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 500 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 23:27:38,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 23:27:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-01-31 23:27:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 86 states have (on average 1.197674418604651) internal successors, (103), 86 states have internal predecessors, (103), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:27:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2022-01-31 23:27:38,974 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 100 [2022-01-31 23:27:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:27:38,974 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2022-01-31 23:27:38,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:27:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2022-01-31 23:27:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 23:27:38,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:27:38,975 INFO L514 BasicCegarLoop]: trace histogram [56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:27:38,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 23:27:38,975 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:27:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:27:38,975 INFO L85 PathProgramCache]: Analyzing trace with hash -994759862, now seen corresponding path program 28 times [2022-01-31 23:27:38,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:27:38,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377519464] [2022-01-31 23:27:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:27:38,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:27:38,979 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:27:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:27:39,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:27:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:27:39,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:27:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:27:50,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 23:27:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:27:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:27:50,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:27:50,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377519464] [2022-01-31 23:27:50,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [377519464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:27:50,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:27:50,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 23:27:50,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545014659] [2022-01-31 23:27:50,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:27:50,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 23:27:50,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:27:50,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 23:27:50,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:27:50,656 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:28:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:28:05,765 INFO L93 Difference]: Finished difference Result 196 states and 240 transitions. [2022-01-31 23:28:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 23:28:05,766 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 102 [2022-01-31 23:28:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:28:05,766 INFO L225 Difference]: With dead ends: 196 [2022-01-31 23:28:05,766 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 23:28:05,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=274, Invalid=3886, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 23:28:05,768 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 2606 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:28:05,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 449 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2606 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:28:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 23:28:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2022-01-31 23:28:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 87 states have internal predecessors, (104), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:28:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2022-01-31 23:28:05,786 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 102 [2022-01-31 23:28:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:28:05,786 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2022-01-31 23:28:05,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:28:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2022-01-31 23:28:05,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 23:28:05,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:28:05,786 INFO L514 BasicCegarLoop]: trace histogram [58, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:28:05,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 23:28:05,786 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:28:05,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:28:05,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1209268128, now seen corresponding path program 29 times [2022-01-31 23:28:05,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:28:05,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064010628] [2022-01-31 23:28:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:28:05,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:28:05,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:28:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:28:05,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:28:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:28:05,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:28:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:28:21,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:28:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:28:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:28:22,013 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:28:22,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064010628] [2022-01-31 23:28:22,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1064010628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:28:22,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:28:22,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 23:28:22,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721370936] [2022-01-31 23:28:22,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:28:22,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 23:28:22,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:28:22,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 23:28:22,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 23:28:22,014 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 33 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:28:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:28:40,854 INFO L93 Difference]: Finished difference Result 198 states and 242 transitions. [2022-01-31 23:28:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 23:28:40,854 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 33 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 104 [2022-01-31 23:28:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:28:40,855 INFO L225 Difference]: With dead ends: 198 [2022-01-31 23:28:40,855 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 23:28:40,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=283, Invalid=4139, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 23:28:40,856 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 3052 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:28:40,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 534 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3052 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 23:28:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 23:28:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2022-01-31 23:28:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 88 states have internal predecessors, (105), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:28:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2022-01-31 23:28:40,863 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 104 [2022-01-31 23:28:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:28:40,863 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2022-01-31 23:28:40,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 33 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:28:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2022-01-31 23:28:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 23:28:40,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:28:40,864 INFO L514 BasicCegarLoop]: trace histogram [60, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:28:40,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 23:28:40,864 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:28:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:28:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash 772842506, now seen corresponding path program 30 times [2022-01-31 23:28:40,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:28:40,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426094626] [2022-01-31 23:28:40,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:28:40,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:28:40,874 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:28:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:28:40,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:28:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:28:40,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:28:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:29:01,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 23:29:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:29:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:29:01,692 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:29:01,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426094626] [2022-01-31 23:29:01,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [426094626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:29:01,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:29:01,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 23:29:01,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672383032] [2022-01-31 23:29:01,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:29:01,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 23:29:01,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:29:01,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 23:29:01,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 23:29:01,693 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:29:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:29:24,827 INFO L93 Difference]: Finished difference Result 200 states and 244 transitions. [2022-01-31 23:29:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 23:29:24,827 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 106 [2022-01-31 23:29:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:29:24,828 INFO L225 Difference]: With dead ends: 200 [2022-01-31 23:29:24,828 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 23:29:24,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=292, Invalid=4400, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 23:29:24,829 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:29:24,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 160 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:29:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 23:29:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2022-01-31 23:29:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:29:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2022-01-31 23:29:24,835 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 106 [2022-01-31 23:29:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:29:24,836 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2022-01-31 23:29:24,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:29:24,836 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2022-01-31 23:29:24,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 23:29:24,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:29:24,836 INFO L514 BasicCegarLoop]: trace histogram [62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:29:24,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 23:29:24,836 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:29:24,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:29:24,837 INFO L85 PathProgramCache]: Analyzing trace with hash -564014176, now seen corresponding path program 31 times [2022-01-31 23:29:24,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:29:24,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460976585] [2022-01-31 23:29:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:29:24,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:29:24,840 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:29:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:29:24,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:29:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:29:24,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:29:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:29:31,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:29:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:29:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:29:31,533 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:29:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460976585] [2022-01-31 23:29:31,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [460976585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:29:31,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:29:31,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 23:29:31,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770355381] [2022-01-31 23:29:31,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:29:31,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 23:29:31,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:29:31,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 23:29:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:29:31,534 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 35 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:29:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:29:43,603 INFO L93 Difference]: Finished difference Result 238 states and 283 transitions. [2022-01-31 23:29:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 23:29:43,604 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 35 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 108 [2022-01-31 23:29:43,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:29:43,604 INFO L225 Difference]: With dead ends: 238 [2022-01-31 23:29:43,605 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 23:29:43,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=443, Invalid=10269, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 23:29:43,606 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 86 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 4940 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 5035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:29:43,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 653 Invalid, 5035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4940 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 23:29:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 23:29:43,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2022-01-31 23:29:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 124 states have (on average 1.153225806451613) internal successors, (143), 124 states have internal predecessors, (143), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:29:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 166 transitions. [2022-01-31 23:29:43,618 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 166 transitions. Word has length 108 [2022-01-31 23:29:43,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:29:43,619 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 166 transitions. [2022-01-31 23:29:43,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 35 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:29:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 166 transitions. [2022-01-31 23:29:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 23:29:43,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:29:43,619 INFO L514 BasicCegarLoop]: trace histogram [63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:29:43,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 23:29:43,619 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:29:43,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:29:43,620 INFO L85 PathProgramCache]: Analyzing trace with hash 249715064, now seen corresponding path program 32 times [2022-01-31 23:29:43,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:29:43,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974580630] [2022-01-31 23:29:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:29:43,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:29:43,630 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:29:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:29:43,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:29:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:29:43,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:29:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:29:43,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 23:29:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:30:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:30:15,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:30:15,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974580630] [2022-01-31 23:30:15,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974580630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:30:15,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:30:15,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 23:30:15,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781776028] [2022-01-31 23:30:15,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:30:15,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 23:30:15,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:30:15,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 23:30:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:30:15,172 INFO L87 Difference]: Start difference. First operand 143 states and 166 transitions. Second operand has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 35 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:30:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:30:51,550 INFO L93 Difference]: Finished difference Result 212 states and 248 transitions. [2022-01-31 23:30:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 23:30:51,551 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 35 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 109 [2022-01-31 23:30:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:30:51,552 INFO L225 Difference]: With dead ends: 212 [2022-01-31 23:30:51,552 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 23:30:51,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 61.3s TimeCoverageRelationStatistics Valid=301, Invalid=4669, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 23:30:51,552 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:30:51,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 466 Invalid, 2963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2872 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-01-31 23:30:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 23:30:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2022-01-31 23:30:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 125 states have (on average 1.144) internal successors, (143), 125 states have internal predecessors, (143), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:30:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 166 transitions. [2022-01-31 23:30:51,565 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 166 transitions. Word has length 109 [2022-01-31 23:30:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:30:51,565 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 166 transitions. [2022-01-31 23:30:51,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 35 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:30:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 166 transitions. [2022-01-31 23:30:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 23:30:51,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:30:51,566 INFO L514 BasicCegarLoop]: trace histogram [64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:30:51,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 23:30:51,566 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:30:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:30:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1428460342, now seen corresponding path program 33 times [2022-01-31 23:30:51,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:30:51,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171459424] [2022-01-31 23:30:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:30:51,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:30:51,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:30:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:30:51,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:30:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:30:51,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:30:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:30:51,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 23:30:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:31:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:31:29,614 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:31:29,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171459424] [2022-01-31 23:31:29,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [171459424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:31:29,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:31:29,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 23:31:29,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742646645] [2022-01-31 23:31:29,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:31:29,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 23:31:29,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:31:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 23:31:29,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:31:29,615 INFO L87 Difference]: Start difference. First operand 144 states and 166 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 36 states have internal predecessors, (69), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:32:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:32:14,907 INFO L93 Difference]: Finished difference Result 217 states and 253 transitions. [2022-01-31 23:32:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 23:32:14,907 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 36 states have internal predecessors, (69), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 110 [2022-01-31 23:32:14,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:32:14,908 INFO L225 Difference]: With dead ends: 217 [2022-01-31 23:32:14,908 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 23:32:14,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 74.4s TimeCoverageRelationStatistics Valid=642, Invalid=10700, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 23:32:14,909 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 93 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 3246 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 3246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:32:14,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 534 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 3246 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-01-31 23:32:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 23:32:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2022-01-31 23:32:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 126 states have (on average 1.1428571428571428) internal successors, (144), 126 states have internal predecessors, (144), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:32:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2022-01-31 23:32:14,923 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 110 [2022-01-31 23:32:14,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:32:14,923 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2022-01-31 23:32:14,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 36 states have internal predecessors, (69), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:32:14,923 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2022-01-31 23:32:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 23:32:14,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:32:14,923 INFO L514 BasicCegarLoop]: trace histogram [65, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:32:14,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 23:32:14,924 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:32:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:32:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1912290376, now seen corresponding path program 34 times [2022-01-31 23:32:14,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:32:14,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801382238] [2022-01-31 23:32:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:32:14,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:32:14,930 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:32:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:32:15,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:32:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:32:15,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:32:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:32:15,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 23:32:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:32:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:32:51,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:32:51,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801382238] [2022-01-31 23:32:51,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801382238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:32:51,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:32:51,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 23:32:51,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553186147] [2022-01-31 23:32:51,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:32:51,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 23:32:51,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:32:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 23:32:51,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:32:51,844 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 37 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:33:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:33:35,047 INFO L93 Difference]: Finished difference Result 222 states and 259 transitions. [2022-01-31 23:33:35,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 23:33:35,047 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 37 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 111 [2022-01-31 23:33:35,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:33:35,048 INFO L225 Difference]: With dead ends: 222 [2022-01-31 23:33:35,048 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 23:33:35,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 75.0s TimeCoverageRelationStatistics Valid=661, Invalid=11329, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 23:33:35,050 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 99 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:33:35,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 245 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 23:33:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 23:33:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2022-01-31 23:33:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 127 states have (on average 1.141732283464567) internal successors, (145), 127 states have internal predecessors, (145), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:33:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 168 transitions. [2022-01-31 23:33:35,064 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 168 transitions. Word has length 111 [2022-01-31 23:33:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:33:35,064 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 168 transitions. [2022-01-31 23:33:35,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 37 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:33:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 168 transitions. [2022-01-31 23:33:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 23:33:35,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:33:35,065 INFO L514 BasicCegarLoop]: trace histogram [66, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:33:35,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 23:33:35,065 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:33:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:33:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash 268847754, now seen corresponding path program 35 times [2022-01-31 23:33:35,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:33:35,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811833238] [2022-01-31 23:33:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:33:35,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:33:35,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:33:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:33:35,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:33:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:33:35,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:33:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:33:35,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 23:33:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:34:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:34:26,184 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:34:26,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811833238] [2022-01-31 23:34:26,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811833238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:34:26,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:34:26,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 23:34:26,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925274624] [2022-01-31 23:34:26,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:34:26,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 23:34:26,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:34:26,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 23:34:26,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:34:26,185 INFO L87 Difference]: Start difference. First operand 146 states and 168 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 38 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:35:28,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:35:28,185 INFO L93 Difference]: Finished difference Result 227 states and 265 transitions. [2022-01-31 23:35:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 23:35:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 38 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 112 [2022-01-31 23:35:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:35:28,190 INFO L225 Difference]: With dead ends: 227 [2022-01-31 23:35:28,190 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 23:35:28,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 108.2s TimeCoverageRelationStatistics Valid=680, Invalid=11976, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 23:35:28,192 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 105 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:35:28,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 144 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:35:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 23:35:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 147. [2022-01-31 23:35:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 128 states have (on average 1.140625) internal successors, (146), 128 states have internal predecessors, (146), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:35:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2022-01-31 23:35:28,208 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 112 [2022-01-31 23:35:28,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:35:28,208 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2022-01-31 23:35:28,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 38 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:35:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2022-01-31 23:35:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 23:35:28,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:35:28,222 INFO L514 BasicCegarLoop]: trace histogram [67, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:35:28,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 23:35:28,222 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:35:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:35:28,223 INFO L85 PathProgramCache]: Analyzing trace with hash -835346952, now seen corresponding path program 36 times [2022-01-31 23:35:28,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:35:28,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887867354] [2022-01-31 23:35:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:35:28,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:35:28,228 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:35:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:35:28,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:35:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:35:28,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:35:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:35:28,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 23:35:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:36:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:36:28,910 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:36:28,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887867354] [2022-01-31 23:36:28,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1887867354] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:36:28,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:36:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 23:36:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829965876] [2022-01-31 23:36:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:36:28,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 23:36:28,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:36:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 23:36:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 23:36:28,911 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 39 states have internal predecessors, (72), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:37:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:37:36,079 INFO L93 Difference]: Finished difference Result 232 states and 271 transitions. [2022-01-31 23:37:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 23:37:36,080 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 39 states have internal predecessors, (72), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 113 [2022-01-31 23:37:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:37:36,080 INFO L225 Difference]: With dead ends: 232 [2022-01-31 23:37:36,081 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 23:37:36,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2773 ImplicationChecksByTransitivity, 115.1s TimeCoverageRelationStatistics Valid=699, Invalid=12641, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 23:37:36,082 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 107 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 3813 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 4019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 3813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:37:36,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 570 Invalid, 4019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 3813 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-01-31 23:37:36,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 23:37:36,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2022-01-31 23:37:36,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 129 states have (on average 1.1395348837209303) internal successors, (147), 129 states have internal predecessors, (147), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:37:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 170 transitions. [2022-01-31 23:37:36,097 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 170 transitions. Word has length 113 [2022-01-31 23:37:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:37:36,097 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 170 transitions. [2022-01-31 23:37:36,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 39 states have internal predecessors, (72), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:37:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 170 transitions. [2022-01-31 23:37:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 23:37:36,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:37:36,098 INFO L514 BasicCegarLoop]: trace histogram [68, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:37:36,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 23:37:36,098 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:37:36,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:37:36,098 INFO L85 PathProgramCache]: Analyzing trace with hash -705644470, now seen corresponding path program 37 times [2022-01-31 23:37:36,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:37:36,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958605387] [2022-01-31 23:37:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:37:36,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:37:36,106 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:37:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:37:36,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:37:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:37:36,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:37:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:37:36,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 23:37:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:38:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:38:37,749 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:38:37,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958605387] [2022-01-31 23:38:37,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [958605387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:38:37,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:38:37,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 23:38:37,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36502772] [2022-01-31 23:38:37,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:38:37,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 23:38:37,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:38:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 23:38:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:38:37,750 INFO L87 Difference]: Start difference. First operand 148 states and 170 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 40 states have internal predecessors, (73), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:39:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:39:52,202 INFO L93 Difference]: Finished difference Result 237 states and 277 transitions. [2022-01-31 23:39:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 23:39:52,202 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 40 states have internal predecessors, (73), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 114 [2022-01-31 23:39:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:39:52,203 INFO L225 Difference]: With dead ends: 237 [2022-01-31 23:39:52,203 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 23:39:52,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 125.4s TimeCoverageRelationStatistics Valid=718, Invalid=13324, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 23:39:52,205 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 115 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 3355 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 3566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:39:52,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 435 Invalid, 3566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3355 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-01-31 23:39:52,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 23:39:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2022-01-31 23:39:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 130 states have (on average 1.1384615384615384) internal successors, (148), 130 states have internal predecessors, (148), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:39:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 171 transitions. [2022-01-31 23:39:52,226 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 171 transitions. Word has length 114 [2022-01-31 23:39:52,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:39:52,226 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 171 transitions. [2022-01-31 23:39:52,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 40 states have internal predecessors, (73), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:39:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 171 transitions. [2022-01-31 23:39:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 23:39:52,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:39:52,227 INFO L514 BasicCegarLoop]: trace histogram [69, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:39:52,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 23:39:52,227 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:39:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:39:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash -979834824, now seen corresponding path program 38 times [2022-01-31 23:39:52,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:39:52,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853216223] [2022-01-31 23:39:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:39:52,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:39:52,232 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:39:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:39:52,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:39:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:39:52,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 23:39:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:39:52,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 23:39:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat