/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:09:15,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:09:15,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:09:15,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 23:09:15,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 23:09:15,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 23:09:15,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 23:09:15,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 23:09:15,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 23:09:15,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 23:09:15,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 23:09:15,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 23:09:15,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 23:09:15,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 23:09:15,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 23:09:15,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 23:09:15,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 23:09:15,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 23:09:15,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 23:09:15,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 23:09:15,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 23:09:15,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 23:09:15,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 23:09:15,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 23:09:15,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 23:09:15,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 23:09:15,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 23:09:15,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 23:09:15,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:09:15,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:09:15,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:09:15,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:09:15,720 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:09:15,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:09:15,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:09:15,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:09:15,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:09:15,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:09:15,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:09:15,723 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:09:15,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:09:15,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:09:15,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:09:15,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:09:15,724 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:09:15,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:09:15,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:09:15,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:09:15,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:09:15,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:09:15,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:09:15,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:09:16,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:09:16,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:09:16,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:09:16,143 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:09:16,144 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:09:16,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2021-02-23 23:09:16,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbaa3b439/a10ba994d64d4e0d8e4e96ee9cecea32/FLAGe728346e6 [2021-02-23 23:09:16,925 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:09:16,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2021-02-23 23:09:16,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbaa3b439/a10ba994d64d4e0d8e4e96ee9cecea32/FLAGe728346e6 [2021-02-23 23:09:17,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbaa3b439/a10ba994d64d4e0d8e4e96ee9cecea32 [2021-02-23 23:09:17,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:09:17,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:09:17,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:09:17,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:09:17,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:09:17,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:09:17" (1/1) ... [2021-02-23 23:09:17,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1668bff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:17, skipping insertion in model container [2021-02-23 23:09:17,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:09:17" (1/1) ... [2021-02-23 23:09:17,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:09:17,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:09:17,686 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-02-23 23:09:17,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:09:17,709 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:09:17,801 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-02-23 23:09:17,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:09:17,905 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:09:17,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:17 WrapperNode [2021-02-23 23:09:17,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:09:17,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:09:17,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:09:17,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:09:17,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:17" (1/1) ... [2021-02-23 23:09:17,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:17" (1/1) ... [2021-02-23 23:09:17,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:17" (1/1) ... [2021-02-23 23:09:17,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:17" (1/1) ... [2021-02-23 23:09:18,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:17" (1/1) ... [2021-02-23 23:09:18,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:17" (1/1) ... [2021-02-23 23:09:18,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:17" (1/1) ... [2021-02-23 23:09:18,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:09:18,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:09:18,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:09:18,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:09:18,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:09:18,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:09:18,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:09:18,177 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:09:18,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-23 23:09:18,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-23 23:09:18,178 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-23 23:09:18,178 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-02-23 23:09:18,178 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2021-02-23 23:09:18,179 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-02-23 23:09:18,179 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2021-02-23 23:09:18,180 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2021-02-23 23:09:18,180 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:09:18,180 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:09:18,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:09:18,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 23:09:18,182 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 23:09:18,182 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:09:18,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:09:18,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:09:18,183 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-23 23:09:18,186 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-23 23:09:18,187 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 23:09:18,187 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 23:09:18,187 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 23:09:18,187 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 23:09:18,188 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 23:09:18,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 23:09:18,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 23:09:18,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 23:09:18,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 23:09:18,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 23:09:18,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 23:09:18,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 23:09:18,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 23:09:18,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 23:09:18,189 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 23:09:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 23:09:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 23:09:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 23:09:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 23:09:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 23:09:18,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 23:09:18,191 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 23:09:18,191 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 23:09:18,191 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 23:09:18,191 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 23:09:18,191 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 23:09:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 23:09:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 23:09:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 23:09:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 23:09:18,192 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 23:09:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 23:09:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 23:09:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 23:09:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 23:09:18,193 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 23:09:18,194 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 23:09:18,194 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 23:09:18,194 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 23:09:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 23:09:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 23:09:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 23:09:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 23:09:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 23:09:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 23:09:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 23:09:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 23:09:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 23:09:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 23:09:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 23:09:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 23:09:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 23:09:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 23:09:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 23:09:18,198 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-23 23:09:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 23:09:18,199 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 23:09:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 23:09:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-23 23:09:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 23:09:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-23 23:09:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 23:09:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 23:09:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-23 23:09:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 23:09:18,202 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 23:09:18,203 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 23:09:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 23:09:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 23:09:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 23:09:18,204 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 23:09:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 23:09:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 23:09:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 23:09:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 23:09:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 23:09:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 23:09:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 23:09:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 23:09:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 23:09:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 23:09:18,206 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 23:09:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 23:09:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 23:09:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 23:09:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 23:09:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 23:09:18,207 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 23:09:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 23:09:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 23:09:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 23:09:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 23:09:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 23:09:18,208 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 23:09:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 23:09:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 23:09:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 23:09:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 23:09:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 23:09:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 23:09:18,209 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 23:09:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 23:09:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-23 23:09:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-02-23 23:09:18,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 23:09:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 23:09:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2021-02-23 23:09:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 23:09:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-02-23 23:09:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:09:18,211 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2021-02-23 23:09:18,212 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2021-02-23 23:09:18,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:09:18,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-02-23 23:09:18,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:09:18,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:09:18,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:09:18,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:09:18,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:09:18,663 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-23 23:09:19,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:09:19,088 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 23:09:19,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:09:19 BoogieIcfgContainer [2021-02-23 23:09:19,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:09:19,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:09:19,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:09:19,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:09:19,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:09:17" (1/3) ... [2021-02-23 23:09:19,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a8c750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:09:19, skipping insertion in model container [2021-02-23 23:09:19,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:09:17" (2/3) ... [2021-02-23 23:09:19,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a8c750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:09:19, skipping insertion in model container [2021-02-23 23:09:19,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:09:19" (3/3) ... [2021-02-23 23:09:19,102 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2021-02-23 23:09:19,111 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:09:19,117 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:09:19,142 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:09:19,190 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:09:19,190 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:09:19,190 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:09:19,190 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:09:19,190 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:09:19,191 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:09:19,191 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:09:19,191 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:09:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2021-02-23 23:09:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-23 23:09:19,226 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:19,228 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:19,228 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:19,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:19,236 INFO L82 PathProgramCache]: Analyzing trace with hash -671159745, now seen corresponding path program 1 times [2021-02-23 23:09:19,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:19,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968412901] [2021-02-23 23:09:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:19,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:19,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:19,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:19,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:19,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:19,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:19,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:19,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:19,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:19,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:19,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:19,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:19,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-02-23 23:09:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:19,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:19,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:19,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:19,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:19,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 23:09:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:19,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:19,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:19,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:19,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:19,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 23:09:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:19,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:19,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:19,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:19,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-23 23:09:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968412901] [2021-02-23 23:09:19,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:09:19,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:09:19,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098769023] [2021-02-23 23:09:19,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:09:19,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:19,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:09:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:09:19,617 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 4 states. [2021-02-23 23:09:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:20,148 INFO L93 Difference]: Finished difference Result 294 states and 342 transitions. [2021-02-23 23:09:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:09:20,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2021-02-23 23:09:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:20,195 INFO L225 Difference]: With dead ends: 294 [2021-02-23 23:09:20,196 INFO L226 Difference]: Without dead ends: 127 [2021-02-23 23:09:20,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:09:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-02-23 23:09:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2021-02-23 23:09:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-02-23 23:09:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2021-02-23 23:09:20,302 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 58 [2021-02-23 23:09:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:20,303 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2021-02-23 23:09:20,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:09:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2021-02-23 23:09:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-02-23 23:09:20,313 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:20,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:20,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:09:20,315 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:20,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1231344721, now seen corresponding path program 1 times [2021-02-23 23:09:20,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:20,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147609749] [2021-02-23 23:09:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:20,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:20,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:20,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:20,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:20,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:20,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:20,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:20,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:20,592 WARN L141 QuantifierPusher]: treesize reduction 7, result has 61.1 percent of original size [2021-02-23 23:09:20,594 WARN L147 QuantifierPusher]: treesize reduction 7, result has 61.1 percent of original size 11 [2021-02-23 23:09:20,622 WARN L141 QuantifierPusher]: treesize reduction 16, result has 54.3 percent of original size [2021-02-23 23:09:20,623 WARN L147 QuantifierPusher]: treesize reduction 16, result has 54.3 percent of original size 19 [2021-02-23 23:09:20,655 WARN L141 QuantifierPusher]: treesize reduction 12, result has 61.3 percent of original size [2021-02-23 23:09:20,656 WARN L147 QuantifierPusher]: treesize reduction 12, result has 61.3 percent of original size 19 [2021-02-23 23:09:20,687 WARN L141 QuantifierPusher]: treesize reduction 12, result has 58.6 percent of original size [2021-02-23 23:09:20,689 WARN L147 QuantifierPusher]: treesize reduction 12, result has 58.6 percent of original size 17 [2021-02-23 23:09:20,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:20,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-23 23:09:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:20,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:20,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:20,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:20,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-23 23:09:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:20,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:20,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-02-23 23:09:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:20,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:20,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:09:20,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147609749] [2021-02-23 23:09:20,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:20,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-23 23:09:20,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335582472] [2021-02-23 23:09:20,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 23:09:20,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:20,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 23:09:20,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-02-23 23:09:20,870 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand 15 states. [2021-02-23 23:09:21,309 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-02-23 23:09:21,440 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-02-23 23:09:22,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:22,796 INFO L93 Difference]: Finished difference Result 279 states and 305 transitions. [2021-02-23 23:09:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 23:09:22,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2021-02-23 23:09:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:22,800 INFO L225 Difference]: With dead ends: 279 [2021-02-23 23:09:22,801 INFO L226 Difference]: Without dead ends: 173 [2021-02-23 23:09:22,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-02-23 23:09:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-02-23 23:09:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2021-02-23 23:09:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-02-23 23:09:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2021-02-23 23:09:22,835 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 73 [2021-02-23 23:09:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:22,835 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2021-02-23 23:09:22,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 23:09:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2021-02-23 23:09:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-02-23 23:09:22,838 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:22,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:22,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:09:22,838 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:22,839 INFO L82 PathProgramCache]: Analyzing trace with hash -647964724, now seen corresponding path program 1 times [2021-02-23 23:09:22,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:22,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790829411] [2021-02-23 23:09:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:22,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:22,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:22,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:22,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:22,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:22,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:22,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:22,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:22,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:22,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:22,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:22,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:23,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:23,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:23,027 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 23:09:23,028 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 23:09:23,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:23,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:09:23,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 23:09:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:23,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:23,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:23,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:23,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:23,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:23,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:23,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-23 23:09:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:23,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:23,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:23,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-02-23 23:09:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:23,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:23,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:09:23,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790829411] [2021-02-23 23:09:23,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:23,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-23 23:09:23,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90211052] [2021-02-23 23:09:23,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 23:09:23,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 23:09:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-23 23:09:23,153 INFO L87 Difference]: Start difference. First operand 138 states and 149 transitions. Second operand 12 states. [2021-02-23 23:09:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:24,491 INFO L93 Difference]: Finished difference Result 317 states and 352 transitions. [2021-02-23 23:09:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 23:09:24,492 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2021-02-23 23:09:24,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:24,495 INFO L225 Difference]: With dead ends: 317 [2021-02-23 23:09:24,495 INFO L226 Difference]: Without dead ends: 210 [2021-02-23 23:09:24,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-02-23 23:09:24,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-23 23:09:24,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 158. [2021-02-23 23:09:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-02-23 23:09:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 171 transitions. [2021-02-23 23:09:24,534 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 171 transitions. Word has length 75 [2021-02-23 23:09:24,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:24,535 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 171 transitions. [2021-02-23 23:09:24,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 23:09:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 171 transitions. [2021-02-23 23:09:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-02-23 23:09:24,537 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:24,538 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:24,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:09:24,538 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:24,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:24,539 INFO L82 PathProgramCache]: Analyzing trace with hash -758130634, now seen corresponding path program 1 times [2021-02-23 23:09:24,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:24,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896669952] [2021-02-23 23:09:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:24,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:24,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:24,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:24,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:24,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:24,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:24,610 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:24,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:24,637 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:24,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:24,644 WARN L141 QuantifierPusher]: treesize reduction 7, result has 61.1 percent of original size [2021-02-23 23:09:24,645 WARN L147 QuantifierPusher]: treesize reduction 7, result has 61.1 percent of original size 11 [2021-02-23 23:09:24,659 WARN L141 QuantifierPusher]: treesize reduction 16, result has 54.3 percent of original size [2021-02-23 23:09:24,660 WARN L147 QuantifierPusher]: treesize reduction 16, result has 54.3 percent of original size 19 [2021-02-23 23:09:24,679 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-23 23:09:24,681 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-23 23:09:24,706 WARN L141 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-02-23 23:09:24,707 WARN L147 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size 21 [2021-02-23 23:09:24,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:24,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 23:09:24,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:24,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:24,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-23 23:09:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:24,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:24,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:24,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-02-23 23:09:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:24,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:24,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:24,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-23 23:09:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:24,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:24,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:09:24,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896669952] [2021-02-23 23:09:24,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:24,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-23 23:09:24,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938705298] [2021-02-23 23:09:24,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 23:09:24,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:24,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 23:09:24,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-23 23:09:24,832 INFO L87 Difference]: Start difference. First operand 158 states and 171 transitions. Second operand 11 states. [2021-02-23 23:09:25,216 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-02-23 23:09:25,400 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-02-23 23:09:25,530 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-02-23 23:09:26,297 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-02-23 23:09:26,439 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-02-23 23:09:26,570 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-02-23 23:09:26,708 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-02-23 23:09:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:26,968 INFO L93 Difference]: Finished difference Result 346 states and 379 transitions. [2021-02-23 23:09:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 23:09:26,969 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2021-02-23 23:09:26,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:26,971 INFO L225 Difference]: With dead ends: 346 [2021-02-23 23:09:26,971 INFO L226 Difference]: Without dead ends: 208 [2021-02-23 23:09:26,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-02-23 23:09:26,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-02-23 23:09:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 165. [2021-02-23 23:09:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-02-23 23:09:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2021-02-23 23:09:27,029 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 83 [2021-02-23 23:09:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:27,030 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2021-02-23 23:09:27,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 23:09:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2021-02-23 23:09:27,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-02-23 23:09:27,032 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:27,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:27,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 23:09:27,033 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:27,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:27,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1367874093, now seen corresponding path program 1 times [2021-02-23 23:09:27,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:27,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889792186] [2021-02-23 23:09:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:27,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:27,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:09:27,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:27,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:09:27,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:27,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:27,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:27,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:27,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:27,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 23:09:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:27,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:27,178 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-23 23:09:27,179 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-23 23:09:27,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:27,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:27,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:27,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-23 23:09:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:27,266 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:27,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-02-23 23:09:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:27,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:27,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:27,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-02-23 23:09:27,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889792186] [2021-02-23 23:09:27,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:09:27,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 23:09:27,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667956925] [2021-02-23 23:09:27,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 23:09:27,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:27,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 23:09:27,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-02-23 23:09:27,327 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand 13 states. [2021-02-23 23:09:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:28,236 INFO L93 Difference]: Finished difference Result 215 states and 234 transitions. [2021-02-23 23:09:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 23:09:28,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2021-02-23 23:09:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:28,239 INFO L225 Difference]: With dead ends: 215 [2021-02-23 23:09:28,239 INFO L226 Difference]: Without dead ends: 209 [2021-02-23 23:09:28,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-23 23:09:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-02-23 23:09:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 185. [2021-02-23 23:09:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-02-23 23:09:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 203 transitions. [2021-02-23 23:09:28,276 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 203 transitions. Word has length 84 [2021-02-23 23:09:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:28,277 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 203 transitions. [2021-02-23 23:09:28,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 23:09:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 203 transitions. [2021-02-23 23:09:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-23 23:09:28,278 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:28,279 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:28,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 23:09:28,279 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:28,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1155760493, now seen corresponding path program 2 times [2021-02-23 23:09:28,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:28,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709038263] [2021-02-23 23:09:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:28,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:28,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:28,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:28,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:28,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:28,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:28,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:28,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:28,384 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 23:09:28,384 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 23:09:28,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:28,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:28,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:28,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-23 23:09:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:28,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:28,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:28,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:28,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-02-23 23:09:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:28,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:28,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-02-23 23:09:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:28,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:28,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:09:28,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709038263] [2021-02-23 23:09:28,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:28,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-23 23:09:28,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062045948] [2021-02-23 23:09:28,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 23:09:28,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:28,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 23:09:28,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-02-23 23:09:28,539 INFO L87 Difference]: Start difference. First operand 185 states and 203 transitions. Second operand 14 states. [2021-02-23 23:09:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:30,384 INFO L93 Difference]: Finished difference Result 325 states and 364 transitions. [2021-02-23 23:09:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 23:09:30,385 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2021-02-23 23:09:30,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:30,387 INFO L225 Difference]: With dead ends: 325 [2021-02-23 23:09:30,388 INFO L226 Difference]: Without dead ends: 231 [2021-02-23 23:09:30,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-02-23 23:09:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-02-23 23:09:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 164. [2021-02-23 23:09:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-02-23 23:09:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2021-02-23 23:09:30,424 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 85 [2021-02-23 23:09:30,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:30,425 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2021-02-23 23:09:30,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 23:09:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2021-02-23 23:09:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-23 23:09:30,427 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:30,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:30,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 23:09:30,427 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:30,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1054815585, now seen corresponding path program 1 times [2021-02-23 23:09:30,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:30,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009277174] [2021-02-23 23:09:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:30,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:30,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:30,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:30,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:30,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:30,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:30,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:30,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:30,521 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 23:09:30,521 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 23:09:30,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:09:30,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 23:09:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:30,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:30,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,591 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:30,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:30,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:09:30,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:09:30,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:30,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-23 23:09:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:30,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:30,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-02-23 23:09:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:30,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:30,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 23:09:30,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009277174] [2021-02-23 23:09:30,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:30,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-23 23:09:30,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950284471] [2021-02-23 23:09:30,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 23:09:30,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:30,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 23:09:30,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-02-23 23:09:30,709 INFO L87 Difference]: Start difference. First operand 164 states and 179 transitions. Second operand 15 states. [2021-02-23 23:09:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:32,101 INFO L93 Difference]: Finished difference Result 342 states and 385 transitions. [2021-02-23 23:09:32,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 23:09:32,102 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 91 [2021-02-23 23:09:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:32,104 INFO L225 Difference]: With dead ends: 342 [2021-02-23 23:09:32,105 INFO L226 Difference]: Without dead ends: 243 [2021-02-23 23:09:32,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-02-23 23:09:32,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-02-23 23:09:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 187. [2021-02-23 23:09:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-02-23 23:09:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 204 transitions. [2021-02-23 23:09:32,143 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 204 transitions. Word has length 91 [2021-02-23 23:09:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:32,144 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 204 transitions. [2021-02-23 23:09:32,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 23:09:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 204 transitions. [2021-02-23 23:09:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-02-23 23:09:32,145 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:32,146 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:32,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 23:09:32,146 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:32,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:32,147 INFO L82 PathProgramCache]: Analyzing trace with hash 117500582, now seen corresponding path program 2 times [2021-02-23 23:09:32,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:32,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935229344] [2021-02-23 23:09:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:32,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:32,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:32,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 23:09:32,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:32,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:32,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:32,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:32,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:32,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:32,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 23:09:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:32,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:32,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:32,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:32,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:09:32,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:09:32,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:32,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:32,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:32,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-23 23:09:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:32,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:32,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-02-23 23:09:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:32,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:32,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:32,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:32,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:32,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-02-23 23:09:32,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935229344] [2021-02-23 23:09:32,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:32,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-02-23 23:09:32,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182571345] [2021-02-23 23:09:32,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 23:09:32,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:32,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 23:09:32,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-02-23 23:09:32,513 INFO L87 Difference]: Start difference. First operand 187 states and 204 transitions. Second operand 18 states. [2021-02-23 23:09:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:34,176 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2021-02-23 23:09:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-23 23:09:34,177 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 100 [2021-02-23 23:09:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:34,179 INFO L225 Difference]: With dead ends: 243 [2021-02-23 23:09:34,179 INFO L226 Difference]: Without dead ends: 237 [2021-02-23 23:09:34,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-02-23 23:09:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-02-23 23:09:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 213. [2021-02-23 23:09:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2021-02-23 23:09:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 236 transitions. [2021-02-23 23:09:34,226 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 236 transitions. Word has length 100 [2021-02-23 23:09:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:34,227 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 236 transitions. [2021-02-23 23:09:34,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 23:09:34,228 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 236 transitions. [2021-02-23 23:09:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-02-23 23:09:34,229 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:34,230 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:34,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 23:09:34,230 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:34,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1495530650, now seen corresponding path program 1 times [2021-02-23 23:09:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:34,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756726486] [2021-02-23 23:09:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:34,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:34,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:34,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:34,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:34,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:34,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:34,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:34,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:34,370 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 23:09:34,371 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 23:09:34,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:34,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:34,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:34,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-23 23:09:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:34,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:34,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:34,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:34,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:09:34,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:09:34,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:34,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-02-23 23:09:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:34,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:34,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-02-23 23:09:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:34,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:34,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 23:09:34,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756726486] [2021-02-23 23:09:34,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:34,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-02-23 23:09:34,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671127473] [2021-02-23 23:09:34,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 23:09:34,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 23:09:34,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-02-23 23:09:34,604 INFO L87 Difference]: Start difference. First operand 213 states and 236 transitions. Second operand 17 states. [2021-02-23 23:09:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:36,704 INFO L93 Difference]: Finished difference Result 362 states and 408 transitions. [2021-02-23 23:09:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-23 23:09:36,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2021-02-23 23:09:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:36,708 INFO L225 Difference]: With dead ends: 362 [2021-02-23 23:09:36,708 INFO L226 Difference]: Without dead ends: 249 [2021-02-23 23:09:36,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 23:09:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-02-23 23:09:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 180. [2021-02-23 23:09:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-02-23 23:09:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 196 transitions. [2021-02-23 23:09:36,741 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 196 transitions. Word has length 101 [2021-02-23 23:09:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:36,741 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 196 transitions. [2021-02-23 23:09:36,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 23:09:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 196 transitions. [2021-02-23 23:09:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-02-23 23:09:36,743 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:36,743 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:36,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 23:09:36,743 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:36,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1883028884, now seen corresponding path program 3 times [2021-02-23 23:09:36,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:36,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425221406] [2021-02-23 23:09:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:36,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:36,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:36,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:36,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:36,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:36,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:09:36,790 WARN L141 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-02-23 23:09:36,791 WARN L147 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size 1 [2021-02-23 23:09:36,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:36,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:36,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:36,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:36,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:36,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:36,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:36,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:36,841 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 23:09:36,842 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 23:09:36,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:36,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:09:36,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 23:09:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:36,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:36,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:36,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-23 23:09:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:36,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:36,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:36,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:36,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:36,949 WARN L141 QuantifierPusher]: treesize reduction 5, result has 68.8 percent of original size [2021-02-23 23:09:36,951 WARN L147 QuantifierPusher]: treesize reduction 5, result has 68.8 percent of original size 11 [2021-02-23 23:09:36,970 WARN L141 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-02-23 23:09:36,971 WARN L147 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size 18 [2021-02-23 23:09:36,996 WARN L141 QuantifierPusher]: treesize reduction 5, result has 76.2 percent of original size [2021-02-23 23:09:36,997 WARN L147 QuantifierPusher]: treesize reduction 5, result has 76.2 percent of original size 16 [2021-02-23 23:09:37,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:37,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:37,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-02-23 23:09:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:37,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:37,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-02-23 23:09:37,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425221406] [2021-02-23 23:09:37,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:37,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-23 23:09:37,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103587487] [2021-02-23 23:09:37,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 23:09:37,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:37,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 23:09:37,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-23 23:09:37,080 INFO L87 Difference]: Start difference. First operand 180 states and 196 transitions. Second operand 14 states. [2021-02-23 23:09:37,578 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-02-23 23:09:38,392 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-02-23 23:09:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:39,150 INFO L93 Difference]: Finished difference Result 373 states and 424 transitions. [2021-02-23 23:09:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-23 23:09:39,151 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2021-02-23 23:09:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:39,153 INFO L225 Difference]: With dead ends: 373 [2021-02-23 23:09:39,153 INFO L226 Difference]: Without dead ends: 270 [2021-02-23 23:09:39,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-02-23 23:09:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-02-23 23:09:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 210. [2021-02-23 23:09:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2021-02-23 23:09:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 232 transitions. [2021-02-23 23:09:39,201 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 232 transitions. Word has length 107 [2021-02-23 23:09:39,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:39,201 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 232 transitions. [2021-02-23 23:09:39,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 23:09:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 232 transitions. [2021-02-23 23:09:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-02-23 23:09:39,204 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:39,204 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:39,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 23:09:39,204 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:39,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:39,205 INFO L82 PathProgramCache]: Analyzing trace with hash 188137929, now seen corresponding path program 1 times [2021-02-23 23:09:39,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:39,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516595785] [2021-02-23 23:09:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:39,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:39,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,285 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:39,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:09:39,293 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-23 23:09:39,293 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-23 23:09:39,301 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-23 23:09:39,302 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-23 23:09:39,311 WARN L141 QuantifierPusher]: treesize reduction 9, result has 74.3 percent of original size [2021-02-23 23:09:39,313 WARN L147 QuantifierPusher]: treesize reduction 9, result has 74.3 percent of original size 26 [2021-02-23 23:09:39,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:39,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:39,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:39,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:39,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:39,413 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 23:09:39,413 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 23:09:39,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:09:39,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 23:09:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:39,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:39,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-23 23:09:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:39,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:39,489 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 23:09:39,490 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 23:09:39,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,506 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:09:39,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-02-23 23:09:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:39,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:39,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:39,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:39,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:39,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:39,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:39,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:39,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-02-23 23:09:39,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516595785] [2021-02-23 23:09:39,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:39,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-02-23 23:09:39,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400814358] [2021-02-23 23:09:39,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-23 23:09:39,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:39,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-23 23:09:39,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-02-23 23:09:39,789 INFO L87 Difference]: Start difference. First operand 210 states and 232 transitions. Second operand 20 states. [2021-02-23 23:09:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:42,254 INFO L93 Difference]: Finished difference Result 329 states and 385 transitions. [2021-02-23 23:09:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-23 23:09:42,255 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2021-02-23 23:09:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:42,259 INFO L225 Difference]: With dead ends: 329 [2021-02-23 23:09:42,259 INFO L226 Difference]: Without dead ends: 323 [2021-02-23 23:09:42,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2021-02-23 23:09:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-02-23 23:09:42,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 260. [2021-02-23 23:09:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2021-02-23 23:09:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 298 transitions. [2021-02-23 23:09:42,332 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 298 transitions. Word has length 109 [2021-02-23 23:09:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:42,332 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 298 transitions. [2021-02-23 23:09:42,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-23 23:09:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 298 transitions. [2021-02-23 23:09:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-02-23 23:09:42,335 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:42,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:42,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 23:09:42,335 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:42,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:42,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1503220247, now seen corresponding path program 2 times [2021-02-23 23:09:42,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:42,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580651300] [2021-02-23 23:09:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:42,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:42,452 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 23:09:42,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-02-23 23:09:42,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 23:09:42,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:42,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:42,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:42,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:42,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:42,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 23:09:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:42,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:42,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:42,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:09:42,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:09:42,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-23 23:09:42,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-23 23:09:42,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:09:42,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 23:09:42,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 23:09:42,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 23:09:42,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 23:09:42,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-23 23:09:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:42,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:42,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-02-23 23:09:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:42,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:42,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:42,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:42,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 23:09:42,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:42,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 23:09:43,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:43,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-23 23:09:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-23 23:09:43,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580651300] [2021-02-23 23:09:43,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:43,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-02-23 23:09:43,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853063874] [2021-02-23 23:09:43,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-23 23:09:43,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:43,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-23 23:09:43,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2021-02-23 23:09:43,128 INFO L87 Difference]: Start difference. First operand 260 states and 298 transitions. Second operand 23 states. [2021-02-23 23:09:46,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:46,009 INFO L93 Difference]: Finished difference Result 344 states and 403 transitions. [2021-02-23 23:09:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-23 23:09:46,012 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2021-02-23 23:09:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:46,016 INFO L225 Difference]: With dead ends: 344 [2021-02-23 23:09:46,016 INFO L226 Difference]: Without dead ends: 334 [2021-02-23 23:09:46,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2021-02-23 23:09:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-02-23 23:09:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 301. [2021-02-23 23:09:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2021-02-23 23:09:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 350 transitions. [2021-02-23 23:09:46,085 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 350 transitions. Word has length 116 [2021-02-23 23:09:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:46,085 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 350 transitions. [2021-02-23 23:09:46,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-02-23 23:09:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 350 transitions. [2021-02-23 23:09:46,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-02-23 23:09:46,088 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:46,088 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:46,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 23:09:46,088 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:46,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1311943245, now seen corresponding path program 2 times [2021-02-23 23:09:46,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:46,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763631920] [2021-02-23 23:09:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:46,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:46,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:46,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:46,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:46,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:46,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:46,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:46,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:46,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:46,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:46,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 23:09:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:46,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:46,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-23 23:09:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:46,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:46,231 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 23:09:46,232 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 23:09:46,247 WARN L141 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size [2021-02-23 23:09:46,248 WARN L147 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size 20 [2021-02-23 23:09:46,281 WARN L141 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-02-23 23:09:46,282 WARN L147 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size 18 [2021-02-23 23:09:46,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:46,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:46,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:46,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:46,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 23:09:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:46,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:46,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-02-23 23:09:46,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763631920] [2021-02-23 23:09:46,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:46,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-23 23:09:46,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59713899] [2021-02-23 23:09:46,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 23:09:46,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:46,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 23:09:46,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-02-23 23:09:46,421 INFO L87 Difference]: Start difference. First operand 301 states and 350 transitions. Second operand 16 states. [2021-02-23 23:09:46,906 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-02-23 23:09:48,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:48,378 INFO L93 Difference]: Finished difference Result 546 states and 652 transitions. [2021-02-23 23:09:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-23 23:09:48,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 117 [2021-02-23 23:09:48,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:48,383 INFO L225 Difference]: With dead ends: 546 [2021-02-23 23:09:48,383 INFO L226 Difference]: Without dead ends: 411 [2021-02-23 23:09:48,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2021-02-23 23:09:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-02-23 23:09:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 325. [2021-02-23 23:09:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2021-02-23 23:09:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 384 transitions. [2021-02-23 23:09:48,461 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 384 transitions. Word has length 117 [2021-02-23 23:09:48,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:48,462 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 384 transitions. [2021-02-23 23:09:48,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 23:09:48,462 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 384 transitions. [2021-02-23 23:09:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-02-23 23:09:48,464 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:48,465 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:48,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 23:09:48,465 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:48,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2082082099, now seen corresponding path program 3 times [2021-02-23 23:09:48,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:48,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715987872] [2021-02-23 23:09:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:48,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:48,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:48,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:48,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:48,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:48,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 23:09:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:48,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:48,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-23 23:09:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:48,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:48,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:48,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:48,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:09:48,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:09:48,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,610 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:48,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-02-23 23:09:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:48,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:48,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:48,659 WARN L141 QuantifierPusher]: treesize reduction 5, result has 68.8 percent of original size [2021-02-23 23:09:48,660 WARN L147 QuantifierPusher]: treesize reduction 5, result has 68.8 percent of original size 11 [2021-02-23 23:09:48,680 WARN L141 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size [2021-02-23 23:09:48,681 WARN L147 QuantifierPusher]: treesize reduction 5, result has 78.3 percent of original size 18 [2021-02-23 23:09:48,715 WARN L141 QuantifierPusher]: treesize reduction 5, result has 76.2 percent of original size [2021-02-23 23:09:48,716 WARN L147 QuantifierPusher]: treesize reduction 5, result has 76.2 percent of original size 16 [2021-02-23 23:09:48,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:09:48,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 23:09:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:48,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:48,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-02-23 23:09:48,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715987872] [2021-02-23 23:09:48,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:48,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-02-23 23:09:48,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414040462] [2021-02-23 23:09:48,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 23:09:48,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:48,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 23:09:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-02-23 23:09:48,811 INFO L87 Difference]: Start difference. First operand 325 states and 384 transitions. Second operand 17 states. [2021-02-23 23:09:50,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:50,500 INFO L93 Difference]: Finished difference Result 514 states and 599 transitions. [2021-02-23 23:09:50,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-23 23:09:50,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 117 [2021-02-23 23:09:50,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:50,503 INFO L225 Difference]: With dead ends: 514 [2021-02-23 23:09:50,503 INFO L226 Difference]: Without dead ends: 339 [2021-02-23 23:09:50,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-02-23 23:09:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-02-23 23:09:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 319. [2021-02-23 23:09:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2021-02-23 23:09:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 372 transitions. [2021-02-23 23:09:50,571 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 372 transitions. Word has length 117 [2021-02-23 23:09:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:50,572 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 372 transitions. [2021-02-23 23:09:50,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 23:09:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 372 transitions. [2021-02-23 23:09:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-02-23 23:09:50,574 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:50,574 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:50,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 23:09:50,575 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:50,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:50,575 INFO L82 PathProgramCache]: Analyzing trace with hash -668263888, now seen corresponding path program 1 times [2021-02-23 23:09:50,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:50,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77565382] [2021-02-23 23:09:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:09:50,595 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:09:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:09:50,613 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:09:50,662 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 23:09:50,663 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 23:09:50,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 23:09:50,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:09:50 BoogieIcfgContainer [2021-02-23 23:09:50,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:09:50,730 INFO L168 Benchmark]: Toolchain (without parser) took 33504.45 ms. Allocated memory was 151.0 MB in the beginning and 390.1 MB in the end (delta: 239.1 MB). Free memory was 125.8 MB in the beginning and 157.8 MB in the end (delta: -32.0 MB). Peak memory consumption was 208.0 MB. Max. memory is 8.0 GB. [2021-02-23 23:09:50,730 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:09:50,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 666.45 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 132.3 MB in the end (delta: -7.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 8.0 GB. [2021-02-23 23:09:50,730 INFO L168 Benchmark]: Boogie Preprocessor took 145.17 ms. Allocated memory is still 151.0 MB. Free memory was 132.3 MB in the beginning and 129.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:09:50,731 INFO L168 Benchmark]: RCFGBuilder took 1038.42 ms. Allocated memory is still 151.0 MB. Free memory was 129.1 MB in the beginning and 73.5 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. [2021-02-23 23:09:50,731 INFO L168 Benchmark]: TraceAbstraction took 31635.49 ms. Allocated memory was 151.0 MB in the beginning and 390.1 MB in the end (delta: 239.1 MB). Free memory was 73.0 MB in the beginning and 157.8 MB in the end (delta: -84.8 MB). Peak memory consumption was 155.3 MB. Max. memory is 8.0 GB. [2021-02-23 23:09:50,732 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 666.45 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 132.3 MB in the end (delta: -7.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 145.17 ms. Allocated memory is still 151.0 MB. Free memory was 132.3 MB in the beginning and 129.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1038.42 ms. Allocated memory is still 151.0 MB. Free memory was 129.1 MB in the beginning and 73.5 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 31635.49 ms. Allocated memory was 151.0 MB in the beginning and 390.1 MB in the end (delta: 239.1 MB). Free memory was 73.0 MB in the beginning and 157.8 MB in the end (delta: -84.8 MB). Peak memory consumption was 155.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 641]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L627] CALL, EXPR _get_nondet_int(2, 5) VAL [\old(from)=2, \old(until)=5] [L620] int len = from; VAL [\old(from)=2, \old(until)=5, from=2, len=2, until=5] [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=2, \old(until)=5, from=2, len=2, len < until && __VERIFIER_nondet_int()=1, until=5] [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=2, \old(until)=5, __VERIFIER_nondet_int()=0, from=2, len=2, len < until && __VERIFIER_nondet_int()=0, until=5] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) VAL [\old(from)=2, \old(until)=5, __VERIFIER_nondet_int()=0, from=2, len=2, len < until && __VERIFIER_nondet_int()=0, until=5] [L624] return len; VAL [\old(from)=2, \old(until)=5, \result=2, from=2, len=2, until=5] [L627] RET, EXPR _get_nondet_int(2, 5) VAL [_get_nondet_int(2, 5)=2] [L627] const int len = _get_nondet_int(2, 5); VAL [_get_nondet_int(2, 5)=2, len=2] [L628] SLL s = sll_create(len); VAL [len=2, s={3:0}] [L628] CALL, EXPR sll_create(len) VAL [\old(len)=2] [L575] SLL head = ((void *)0); VAL [\old(len)=2, head={0:0}, len=2] [L576] EXPR len-- VAL [\old(len)=2, head={0:0}, len=1, len--=2] [L576] COND TRUE len-- > 0 VAL [\old(len)=2, head={0:0}, len=1, len--=2] [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=2, head={0:0}, len=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={0:0}, len=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L581] new_head->next = head VAL [\old(len)=2, head={0:0}, len=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L582] head = new_head VAL [\old(len)=2, head={-1:0}, len=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L576] EXPR len-- VAL [\old(len)=2, head={-1:0}, len=0, len--=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L576] COND TRUE len-- > 0 VAL [\old(len)=2, head={-1:0}, len=0, len--=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=2, head={-1:0}, len=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={-1:0}, len=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L581] new_head->next = head VAL [\old(len)=2, head={-1:0}, len=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L582] head = new_head VAL [\old(len)=2, head={-2:0}, len=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L576] EXPR len-- VAL [\old(len)=2, head={-2:0}, len=-1, len--=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L576] COND FALSE !(len-- > 0) VAL [\old(len)=2, head={-2:0}, len=-1, len--=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L584] return head; VAL [\old(len)=2, \result={-2:0}, head={-2:0}, len=-1, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L628] RET, EXPR sll_create(len) VAL [len=2, s={3:0}, sll_create(len)={-2:0}] [L628] SLL s = sll_create(len); VAL [len=2, s={3:0}, sll_create(len)={-2:0}] [L629] CALL, EXPR _get_nondet_int(0, len - 1) VAL [\old(from)=0, \old(until)=1] [L620] int len = from; VAL [\old(from)=0, \old(until)=1, from=0, len=0, until=1] [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, from=0, len=0, len < until && __VERIFIER_nondet_int()=1, until=1] [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, __VERIFIER_nondet_int()=1, from=0, len=0, len < until && __VERIFIER_nondet_int()=1, until=1] [L621] COND TRUE len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, __VERIFIER_nondet_int()=1, from=0, len=0, len < until && __VERIFIER_nondet_int()=1, until=1] [L622] len++ VAL [\old(from)=0, \old(until)=1, from=0, len=1, until=1] [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, from=0, len=1, len < until && __VERIFIER_nondet_int()=0, until=1] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) VAL [\old(from)=0, \old(until)=1, from=0, len=1, len < until && __VERIFIER_nondet_int()=0, until=1] [L624] return len; VAL [\old(from)=0, \old(until)=1, \result=1, from=0, len=1, until=1] [L629] RET, EXPR _get_nondet_int(0, len - 1) VAL [_get_nondet_int(0, len - 1)=1, len=2, s={3:0}] [L629] const int k = _get_nondet_int(0, len - 1); VAL [_get_nondet_int(0, len - 1)=1, k=1, len=2, s={3:0}] [L630] int i = 0; VAL [i=0, k=1, len=2, s={3:0}] [L631] i < k && __VERIFIER_nondet_int() VAL [i=0, i < k && __VERIFIER_nondet_int()=1, k=1, len=2, s={3:0}] [L631] i < k && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, i=0, i < k && __VERIFIER_nondet_int()=0, k=1, len=2, s={3:0}] [L631] COND FALSE !(i < k && __VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, i=0, i < k && __VERIFIER_nondet_int()=0, k=1, len=2, s={3:0}] [L636] EXPR \read(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={3:0}] [L636] CALL, EXPR sll_length(s) VAL [head={-2:0}] [L587] int len = 0; VAL [head={-2:0}, head={-2:0}, len=0] [L588] COND TRUE \read(head) VAL [head={-2:0}, head={-2:0}, len=0] [L589] len++ VAL [head={-2:0}, head={-2:0}, len=1] [L590] EXPR head->next VAL [head={-2:0}, head={-2:0}, head->next={-1:0}, len=1] [L590] head = head->next VAL [head={-2:0}, head={-1:0}, head->next={-1:0}, len=1] [L588] COND TRUE \read(head) VAL [head={-2:0}, head={-1:0}, len=1] [L589] len++ VAL [head={-2:0}, head={-1:0}, len=2] [L590] EXPR head->next VAL [head={-1:0}, head={-2:0}, head->next={0:0}, len=2] [L590] head = head->next VAL [head={-2:0}, head={0:0}, head->next={0:0}, len=2] [L588] COND FALSE !(\read(head)) VAL [head={0:0}, head={-2:0}, len=2] [L592] return len; VAL [\result=2, head={-2:0}, head={0:0}, len=2] [L636] RET, EXPR sll_length(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={3:0}, sll_length(s)=2] [L636] COND TRUE k + len != sll_length(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={3:0}, sll_length(s)=2] [L641] reach_error() VAL [i=0, k=1, len=2, s={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 163 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 31.4s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 25.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1928 SDtfs, 4254 SDslu, 11833 SDs, 0 SdLazy, 12681 SolverSat, 559 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 598 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 14.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=325occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 14 MinimizatonAttempts, 641 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1435 NumberOfCodeBlocks, 1435 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1302 ConstructedInterpolants, 0 QuantifiedInterpolants, 634151 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 174/354 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...