/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:17:16,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:17:16,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:17:16,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:17:16,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:17:16,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:17:16,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:17:16,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:17:16,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:17:16,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:17:16,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:17:16,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:17:16,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:17:16,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:17:16,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:17:16,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:17:16,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:17:16,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:17:16,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:17:16,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:17:16,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:17:16,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:17:16,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:17:16,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:17:16,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:17:16,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:17:16,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:17:16,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:17:16,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:17:16,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 22:17:16,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 22:17:16,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 22:17:16,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 22:17:16,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 22:17:16,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 22:17:16,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 22:17:16,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 22:17:16,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 22:17:16,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:17:16,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:17:16,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:17:16,318 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:17:16,337 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:17:16,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:17:16,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:17:16,340 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:17:16,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:17:16,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:17:16,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:17:16,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:17:16,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:17:16,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:17:16,341 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:17:16,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:17:16,342 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:17:16,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:17:16,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:17:16,342 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:17:16,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:17:16,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:17:16,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:17:16,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:17:16,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:17:16,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:17:16,344 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-08-22 22:17:16,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:17:16,724 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:17:16,729 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:17:16,730 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:17:16,731 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:17:16,732 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-08-22 22:17:16,827 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/320d3536c/599cca2b8afb42f488a2fbea8db86c2c/FLAG36be620e0 [2020-08-22 22:17:17,411 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:17:17,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i [2020-08-22 22:17:17,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/320d3536c/599cca2b8afb42f488a2fbea8db86c2c/FLAG36be620e0 [2020-08-22 22:17:17,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/320d3536c/599cca2b8afb42f488a2fbea8db86c2c [2020-08-22 22:17:17,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:17:17,724 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:17:17,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:17:17,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:17:17,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:17:17,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:17:17" (1/1) ... [2020-08-22 22:17:17,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548f2135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:17:17, skipping insertion in model container [2020-08-22 22:17:17,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:17:17" (1/1) ... [2020-08-22 22:17:17,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:17:17,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:17:18,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:17:18,268 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:17:18,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:17:18,373 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:17:18,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:17:18 WrapperNode [2020-08-22 22:17:18,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:17:18,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:17:18,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:17:18,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:17:18,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:17:18" (1/1) ... [2020-08-22 22:17:18,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:17:18" (1/1) ... [2020-08-22 22:17:18,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:17:18" (1/1) ... [2020-08-22 22:17:18,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:17:18" (1/1) ... [2020-08-22 22:17:18,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:17:18" (1/1) ... [2020-08-22 22:17:18,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:17:18" (1/1) ... [2020-08-22 22:17:18,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:17:18" (1/1) ... [2020-08-22 22:17:18,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:17:18,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:17:18,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:17:18,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:17:18,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:17:18" (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 [2020-08-22 22:17:18,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:17:18,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:17:18,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 22:17:18,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 22:17:18,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-08-22 22:17:18,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-08-22 22:17:18,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-08-22 22:17:18,526 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 22:17:18,526 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:17:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:17:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:17:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 22:17:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 22:17:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 22:17:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 22:17:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 22:17:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 22:17:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 22:17:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 22:17:18,528 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 22:17:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 22:17:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 22:17:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 22:17:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 22:17:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 22:17:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 22:17:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 22:17:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 22:17:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 22:17:18,530 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-08-22 22:17:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-08-22 22:17:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-08-22 22:17:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 22:17:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 22:17:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 22:17:18,532 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 22:17:18,532 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 22:17:18,532 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 22:17:18,532 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 22:17:18,532 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 22:17:18,533 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 22:17:18,533 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 22:17:18,533 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 22:17:18,533 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 22:17:18,533 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 22:17:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 22:17:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 22:17:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 22:17:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 22:17:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 22:17:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 22:17:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 22:17:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 22:17:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 22:17:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 22:17:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 22:17:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 22:17:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 22:17:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 22:17:18,536 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 22:17:18,536 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 22:17:18,536 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 22:17:18,536 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 22:17:18,536 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 22:17:18,536 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 22:17:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 22:17:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 22:17:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 22:17:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 22:17:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 22:17:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 22:17:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 22:17:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 22:17:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 22:17:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 22:17:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 22:17:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 22:17:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 22:17:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 22:17:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 22:17:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 22:17:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 22:17:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 22:17:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 22:17:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 22:17:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 22:17:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 22:17:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 22:17:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 22:17:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 22:17:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 22:17:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 22:17:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 22:17:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 22:17:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 22:17:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 22:17:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 22:17:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 22:17:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 22:17:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 22:17:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 22:17:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 22:17:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 22:17:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 22:17:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 22:17:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 22:17:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 22:17:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 22:17:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 22:17:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 22:17:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 22:17:18,544 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 22:17:18,544 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 22:17:18,544 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 22:17:18,544 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 22:17:18,544 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 22:17:18,544 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 22:17:18,544 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 22:17:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 22:17:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:17:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 22:17:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:17:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 22:17:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 22:17:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:17:18,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:17:18,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:17:18,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:17:18,956 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 22:17:19,162 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:17:19,162 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 22:17:19,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:17:19 BoogieIcfgContainer [2020-08-22 22:17:19,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:17:19,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:17:19,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:17:19,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:17:19,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:17:17" (1/3) ... [2020-08-22 22:17:19,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0000e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:17:19, skipping insertion in model container [2020-08-22 22:17:19,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:17:18" (2/3) ... [2020-08-22 22:17:19,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0000e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:17:19, skipping insertion in model container [2020-08-22 22:17:19,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:17:19" (3/3) ... [2020-08-22 22:17:19,179 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-08-22 22:17:19,191 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:17:19,199 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:17:19,213 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:17:19,234 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:17:19,234 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:17:19,234 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:17:19,234 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:17:19,234 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:17:19,235 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:17:19,235 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:17:19,235 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:17:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-22 22:17:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 22:17:19,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:19,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:17:19,264 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:19,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1227115345, now seen corresponding path program 1 times [2020-08-22 22:17:19,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:19,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088538980] [2020-08-22 22:17:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:19,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:19,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088538980] [2020-08-22 22:17:19,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:17:19,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:17:19,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424535176] [2020-08-22 22:17:19,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:17:19,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:19,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:17:19,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:17:19,540 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-08-22 22:17:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:19,764 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-08-22 22:17:19,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:17:19,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 22:17:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:19,775 INFO L225 Difference]: With dead ends: 110 [2020-08-22 22:17:19,776 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 22:17:19,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:17:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 22:17:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 22:17:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 22:17:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-08-22 22:17:19,834 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 22 [2020-08-22 22:17:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:19,835 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-08-22 22:17:19,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:17:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-08-22 22:17:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 22:17:19,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:19,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:17:19,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:17:19,838 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:19,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1237633361, now seen corresponding path program 1 times [2020-08-22 22:17:19,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:19,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983227744] [2020-08-22 22:17:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:19,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:19,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983227744] [2020-08-22 22:17:19,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:17:19,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 22:17:19,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926024456] [2020-08-22 22:17:19,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:17:19,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:19,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:17:19,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:17:19,982 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 7 states. [2020-08-22 22:17:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:20,275 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-08-22 22:17:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:17:20,276 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-08-22 22:17:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:20,278 INFO L225 Difference]: With dead ends: 134 [2020-08-22 22:17:20,279 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 22:17:20,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:17:20,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 22:17:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 70. [2020-08-22 22:17:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 22:17:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-08-22 22:17:20,296 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 30 [2020-08-22 22:17:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:20,297 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-08-22 22:17:20,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:17:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-08-22 22:17:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 22:17:20,298 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:20,299 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:17:20,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:17:20,299 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:20,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1213729417, now seen corresponding path program 1 times [2020-08-22 22:17:20,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:20,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250775353] [2020-08-22 22:17:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:20,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:20,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250775353] [2020-08-22 22:17:20,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:17:20,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 22:17:20,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276989829] [2020-08-22 22:17:20,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:17:20,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:20,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:17:20,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:17:20,449 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states. [2020-08-22 22:17:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:20,712 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2020-08-22 22:17:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:17:20,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-08-22 22:17:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:20,715 INFO L225 Difference]: With dead ends: 137 [2020-08-22 22:17:20,715 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 22:17:20,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:17:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 22:17:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 67. [2020-08-22 22:17:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 22:17:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-08-22 22:17:20,728 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 36 [2020-08-22 22:17:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:20,728 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-08-22 22:17:20,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:17:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-08-22 22:17:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 22:17:20,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:20,730 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:17:20,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:17:20,730 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:20,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2044556103, now seen corresponding path program 1 times [2020-08-22 22:17:20,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:20,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246826686] [2020-08-22 22:17:20,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:20,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:20,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246826686] [2020-08-22 22:17:20,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:17:20,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 22:17:20,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914911814] [2020-08-22 22:17:20,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:17:20,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:20,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:17:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:17:20,871 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 7 states. [2020-08-22 22:17:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:21,132 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2020-08-22 22:17:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:17:21,133 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-08-22 22:17:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:21,134 INFO L225 Difference]: With dead ends: 119 [2020-08-22 22:17:21,135 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 22:17:21,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:17:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 22:17:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2020-08-22 22:17:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 22:17:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-08-22 22:17:21,150 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 36 [2020-08-22 22:17:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:21,151 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-08-22 22:17:21,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:17:21,151 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-08-22 22:17:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 22:17:21,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:21,155 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:17:21,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:17:21,155 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:21,156 INFO L82 PathProgramCache]: Analyzing trace with hash -833752717, now seen corresponding path program 1 times [2020-08-22 22:17:21,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:21,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348437117] [2020-08-22 22:17:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:21,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:21,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348437117] [2020-08-22 22:17:21,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:21,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:17:21,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273928799] [2020-08-22 22:17:21,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:17:21,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:17:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:17:21,417 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 15 states. [2020-08-22 22:17:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:22,247 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2020-08-22 22:17:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:17:22,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-08-22 22:17:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:22,250 INFO L225 Difference]: With dead ends: 157 [2020-08-22 22:17:22,250 INFO L226 Difference]: Without dead ends: 144 [2020-08-22 22:17:22,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:17:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-08-22 22:17:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 78. [2020-08-22 22:17:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 22:17:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-08-22 22:17:22,280 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 41 [2020-08-22 22:17:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:22,282 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-08-22 22:17:22,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:17:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-08-22 22:17:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 22:17:22,288 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:22,288 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:17:22,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:17:22,291 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:22,291 INFO L82 PathProgramCache]: Analyzing trace with hash 865863745, now seen corresponding path program 1 times [2020-08-22 22:17:22,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:22,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464062720] [2020-08-22 22:17:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:22,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:22,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464062720] [2020-08-22 22:17:22,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:22,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:17:22,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698999940] [2020-08-22 22:17:22,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:17:22,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:22,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:17:22,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:17:22,579 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-08-22 22:17:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:23,442 INFO L93 Difference]: Finished difference Result 181 states and 193 transitions. [2020-08-22 22:17:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:17:23,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-08-22 22:17:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:23,444 INFO L225 Difference]: With dead ends: 181 [2020-08-22 22:17:23,445 INFO L226 Difference]: Without dead ends: 175 [2020-08-22 22:17:23,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:17:23,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-08-22 22:17:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2020-08-22 22:17:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 22:17:23,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2020-08-22 22:17:23,467 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 41 [2020-08-22 22:17:23,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:23,468 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2020-08-22 22:17:23,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:17:23,468 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2020-08-22 22:17:23,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 22:17:23,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:23,469 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 22:17:23,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:17:23,470 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:23,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1077832869, now seen corresponding path program 1 times [2020-08-22 22:17:23,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:23,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011684975] [2020-08-22 22:17:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:23,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:23,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011684975] [2020-08-22 22:17:23,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:23,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:17:23,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115967624] [2020-08-22 22:17:23,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:17:23,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:23,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:17:23,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:17:23,825 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 16 states. [2020-08-22 22:17:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:24,865 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2020-08-22 22:17:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 22:17:24,866 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-08-22 22:17:24,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:24,867 INFO L225 Difference]: With dead ends: 165 [2020-08-22 22:17:24,867 INFO L226 Difference]: Without dead ends: 159 [2020-08-22 22:17:24,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:17:24,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-08-22 22:17:24,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2020-08-22 22:17:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 22:17:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-08-22 22:17:24,892 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 47 [2020-08-22 22:17:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:24,893 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-08-22 22:17:24,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:17:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-08-22 22:17:24,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 22:17:24,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:24,894 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 22:17:24,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:17:24,895 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:24,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:24,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1893706375, now seen corresponding path program 1 times [2020-08-22 22:17:24,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:24,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321950984] [2020-08-22 22:17:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:25,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:25,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321950984] [2020-08-22 22:17:25,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:25,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:17:25,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712563375] [2020-08-22 22:17:25,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:17:25,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:25,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:17:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:17:25,192 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 16 states. [2020-08-22 22:17:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:26,262 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2020-08-22 22:17:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 22:17:26,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-08-22 22:17:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:26,264 INFO L225 Difference]: With dead ends: 179 [2020-08-22 22:17:26,264 INFO L226 Difference]: Without dead ends: 173 [2020-08-22 22:17:26,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:17:26,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-22 22:17:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2020-08-22 22:17:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 22:17:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-08-22 22:17:26,287 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 47 [2020-08-22 22:17:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:26,287 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-08-22 22:17:26,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:17:26,288 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-08-22 22:17:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 22:17:26,288 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:26,289 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 22:17:26,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:17:26,289 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:26,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:26,290 INFO L82 PathProgramCache]: Analyzing trace with hash -857024599, now seen corresponding path program 1 times [2020-08-22 22:17:26,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:26,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462356290] [2020-08-22 22:17:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:26,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:26,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462356290] [2020-08-22 22:17:26,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:26,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:17:26,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847099669] [2020-08-22 22:17:26,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:17:26,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:17:26,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:17:26,501 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 15 states. [2020-08-22 22:17:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:27,239 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2020-08-22 22:17:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:17:27,240 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-08-22 22:17:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:27,242 INFO L225 Difference]: With dead ends: 196 [2020-08-22 22:17:27,242 INFO L226 Difference]: Without dead ends: 177 [2020-08-22 22:17:27,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-08-22 22:17:27,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-08-22 22:17:27,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 113. [2020-08-22 22:17:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 22:17:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-08-22 22:17:27,265 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 47 [2020-08-22 22:17:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:27,266 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-08-22 22:17:27,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:17:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-08-22 22:17:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 22:17:27,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:27,267 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-08-22 22:17:27,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:17:27,268 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:27,269 INFO L82 PathProgramCache]: Analyzing trace with hash 294895633, now seen corresponding path program 2 times [2020-08-22 22:17:27,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:27,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652193894] [2020-08-22 22:17:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:27,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:27,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652193894] [2020-08-22 22:17:27,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:27,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 22:17:27,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691118700] [2020-08-22 22:17:27,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 22:17:27,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:27,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 22:17:27,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:17:27,731 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 22 states. [2020-08-22 22:17:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:29,556 INFO L93 Difference]: Finished difference Result 201 states and 214 transitions. [2020-08-22 22:17:29,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 22:17:29,557 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-08-22 22:17:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:29,559 INFO L225 Difference]: With dead ends: 201 [2020-08-22 22:17:29,559 INFO L226 Difference]: Without dead ends: 195 [2020-08-22 22:17:29,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 22:17:29,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-08-22 22:17:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 138. [2020-08-22 22:17:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 22:17:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2020-08-22 22:17:29,580 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 52 [2020-08-22 22:17:29,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:29,580 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2020-08-22 22:17:29,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 22:17:29,580 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2020-08-22 22:17:29,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 22:17:29,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:29,581 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 22:17:29,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:17:29,582 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:29,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1689189507, now seen corresponding path program 1 times [2020-08-22 22:17:29,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:29,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194694721] [2020-08-22 22:17:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:29,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:30,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194694721] [2020-08-22 22:17:30,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:30,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 22:17:30,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260168124] [2020-08-22 22:17:30,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 22:17:30,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:30,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 22:17:30,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:17:30,009 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 22 states. [2020-08-22 22:17:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:31,805 INFO L93 Difference]: Finished difference Result 238 states and 255 transitions. [2020-08-22 22:17:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 22:17:31,806 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-08-22 22:17:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:31,808 INFO L225 Difference]: With dead ends: 238 [2020-08-22 22:17:31,808 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 22:17:31,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 22:17:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 22:17:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 150. [2020-08-22 22:17:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 22:17:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 161 transitions. [2020-08-22 22:17:31,833 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 161 transitions. Word has length 52 [2020-08-22 22:17:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:31,834 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 161 transitions. [2020-08-22 22:17:31,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 22:17:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 161 transitions. [2020-08-22 22:17:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 22:17:31,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:31,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:17:31,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:17:31,836 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:31,836 INFO L82 PathProgramCache]: Analyzing trace with hash 219391251, now seen corresponding path program 1 times [2020-08-22 22:17:31,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:31,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435840073] [2020-08-22 22:17:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:32,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:32,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435840073] [2020-08-22 22:17:32,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:32,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:17:32,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299533027] [2020-08-22 22:17:32,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:17:32,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:32,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:17:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:17:32,110 INFO L87 Difference]: Start difference. First operand 150 states and 161 transitions. Second operand 16 states. [2020-08-22 22:17:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:33,071 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2020-08-22 22:17:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 22:17:33,071 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-08-22 22:17:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:33,073 INFO L225 Difference]: With dead ends: 208 [2020-08-22 22:17:33,073 INFO L226 Difference]: Without dead ends: 193 [2020-08-22 22:17:33,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:17:33,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-22 22:17:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 152. [2020-08-22 22:17:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-22 22:17:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 163 transitions. [2020-08-22 22:17:33,099 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 163 transitions. Word has length 53 [2020-08-22 22:17:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:33,099 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 163 transitions. [2020-08-22 22:17:33,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:17:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 163 transitions. [2020-08-22 22:17:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 22:17:33,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:33,100 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-08-22 22:17:33,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:17:33,101 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1256073027, now seen corresponding path program 2 times [2020-08-22 22:17:33,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:33,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482014586] [2020-08-22 22:17:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:33,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:33,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482014586] [2020-08-22 22:17:33,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:33,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:17:33,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63721776] [2020-08-22 22:17:33,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:17:33,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:33,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:17:33,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:17:33,374 INFO L87 Difference]: Start difference. First operand 152 states and 163 transitions. Second operand 16 states. [2020-08-22 22:17:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:34,302 INFO L93 Difference]: Finished difference Result 190 states and 203 transitions. [2020-08-22 22:17:34,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:17:34,303 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-08-22 22:17:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:34,304 INFO L225 Difference]: With dead ends: 190 [2020-08-22 22:17:34,305 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 22:17:34,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-08-22 22:17:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 22:17:34,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2020-08-22 22:17:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-08-22 22:17:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2020-08-22 22:17:34,324 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 53 [2020-08-22 22:17:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:34,325 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2020-08-22 22:17:34,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:17:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2020-08-22 22:17:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 22:17:34,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:34,326 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-08-22 22:17:34,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:17:34,326 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:34,327 INFO L82 PathProgramCache]: Analyzing trace with hash 164878513, now seen corresponding path program 2 times [2020-08-22 22:17:34,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:34,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165530057] [2020-08-22 22:17:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:34,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:34,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165530057] [2020-08-22 22:17:34,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:34,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:17:34,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936247172] [2020-08-22 22:17:34,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:17:34,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:34,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:17:34,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:17:34,635 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand 16 states. [2020-08-22 22:17:35,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:35,571 INFO L93 Difference]: Finished difference Result 180 states and 191 transitions. [2020-08-22 22:17:35,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:17:35,571 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-08-22 22:17:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:35,572 INFO L225 Difference]: With dead ends: 180 [2020-08-22 22:17:35,573 INFO L226 Difference]: Without dead ends: 154 [2020-08-22 22:17:35,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-08-22 22:17:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-22 22:17:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 129. [2020-08-22 22:17:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-08-22 22:17:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2020-08-22 22:17:35,594 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 53 [2020-08-22 22:17:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:35,594 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2020-08-22 22:17:35,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:17:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2020-08-22 22:17:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 22:17:35,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:35,595 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] [2020-08-22 22:17:35,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:17:35,596 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:35,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:35,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1732440393, now seen corresponding path program 1 times [2020-08-22 22:17:35,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:35,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179821868] [2020-08-22 22:17:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:36,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:36,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179821868] [2020-08-22 22:17:36,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:36,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 22:17:36,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819749955] [2020-08-22 22:17:36,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 22:17:36,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:36,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 22:17:36,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:17:36,033 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand 22 states. [2020-08-22 22:17:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:37,643 INFO L93 Difference]: Finished difference Result 207 states and 220 transitions. [2020-08-22 22:17:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 22:17:37,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-22 22:17:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:37,646 INFO L225 Difference]: With dead ends: 207 [2020-08-22 22:17:37,646 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 22:17:37,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 22:17:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 22:17:37,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 145. [2020-08-22 22:17:37,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-08-22 22:17:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2020-08-22 22:17:37,672 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 58 [2020-08-22 22:17:37,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:37,672 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2020-08-22 22:17:37,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 22:17:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2020-08-22 22:17:37,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 22:17:37,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:37,673 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] [2020-08-22 22:17:37,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:17:37,674 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:37,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:37,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1525845127, now seen corresponding path program 3 times [2020-08-22 22:17:37,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:37,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694075148] [2020-08-22 22:17:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:38,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:17:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:17:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:17:38,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694075148] [2020-08-22 22:17:38,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:17:38,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 22:17:38,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466000152] [2020-08-22 22:17:38,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 22:17:38,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:17:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 22:17:38,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-08-22 22:17:38,387 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand 24 states. [2020-08-22 22:17:40,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:17:40,662 INFO L93 Difference]: Finished difference Result 208 states and 221 transitions. [2020-08-22 22:17:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 22:17:40,663 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-08-22 22:17:40,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:17:40,665 INFO L225 Difference]: With dead ends: 208 [2020-08-22 22:17:40,665 INFO L226 Difference]: Without dead ends: 195 [2020-08-22 22:17:40,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=424, Invalid=2438, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 22:17:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-08-22 22:17:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 154. [2020-08-22 22:17:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-08-22 22:17:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-08-22 22:17:40,694 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 58 [2020-08-22 22:17:40,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:17:40,695 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-08-22 22:17:40,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 22:17:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-08-22 22:17:40,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 22:17:40,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:17:40,696 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:17:40,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:17:40,697 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:17:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:17:40,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1049071675, now seen corresponding path program 1 times [2020-08-22 22:17:40,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:17:40,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522101553] [2020-08-22 22:17:40,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:17:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:17:40,711 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:17:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:17:40,724 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:17:40,760 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:17:40,761 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:17:40,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:17:40,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:17:40 BoogieIcfgContainer [2020-08-22 22:17:40,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:17:40,857 INFO L168 Benchmark]: Toolchain (without parser) took 23129.73 ms. Allocated memory was 136.3 MB in the beginning and 478.2 MB in the end (delta: 341.8 MB). Free memory was 99.3 MB in the beginning and 358.2 MB in the end (delta: -258.9 MB). Peak memory consumption was 82.9 MB. Max. memory is 7.1 GB. [2020-08-22 22:17:40,858 INFO L168 Benchmark]: CDTParser took 1.02 ms. Allocated memory is still 136.3 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:17:40,859 INFO L168 Benchmark]: CACSL2BoogieTranslator took 649.05 ms. Allocated memory was 136.3 MB in the beginning and 198.7 MB in the end (delta: 62.4 MB). Free memory was 99.1 MB in the beginning and 164.1 MB in the end (delta: -65.0 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-08-22 22:17:40,859 INFO L168 Benchmark]: Boogie Preprocessor took 67.78 ms. Allocated memory is still 198.7 MB. Free memory was 164.1 MB in the beginning and 161.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-08-22 22:17:40,860 INFO L168 Benchmark]: RCFGBuilder took 727.09 ms. Allocated memory is still 198.7 MB. Free memory was 161.3 MB in the beginning and 113.0 MB in the end (delta: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:17:40,864 INFO L168 Benchmark]: TraceAbstraction took 21676.73 ms. Allocated memory was 198.7 MB in the beginning and 478.2 MB in the end (delta: 279.4 MB). Free memory was 112.3 MB in the beginning and 358.2 MB in the end (delta: -245.9 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:17:40,867 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.02 ms. Allocated memory is still 136.3 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 649.05 ms. Allocated memory was 136.3 MB in the beginning and 198.7 MB in the end (delta: 62.4 MB). Free memory was 99.1 MB in the beginning and 164.1 MB in the end (delta: -65.0 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.78 ms. Allocated memory is still 198.7 MB. Free memory was 164.1 MB in the beginning and 161.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 727.09 ms. Allocated memory is still 198.7 MB. Free memory was 161.3 MB in the beginning and 113.0 MB in the end (delta: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21676.73 ms. Allocated memory was 198.7 MB in the beginning and 478.2 MB in the end (delta: 279.4 MB). Free memory was 112.3 MB in the beginning and 358.2 MB in the end (delta: -245.9 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L522] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L523] List t; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L524] List p = a; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L525] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L526] p->h = 1 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L527] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L528] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L529] p->n = t VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L530] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->n={-2:0}, t={-2:0}] [L530] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->n={-2:0}, t={-2:0}] [L525] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-2:0}] [L532] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-2:0}] [L533] p->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-2:0}] [L534] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L535] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L536] p->n = t VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L537] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->n={-3:0}, t={-3:0}] [L537] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-3:0}, p->n={-3:0}, t={-3:0}] [L532] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-3:0}, t={-3:0}] [L539] p->h = 3 VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-3:0}, t={-3:0}] [L540] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-3:0}] [L541] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L541] COND FALSE !(p->h == 2) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L543] COND TRUE p->h == 1 VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L544] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->n={-2:0}, t={-3:0}] [L544] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->n={-2:0}, t={-3:0}] [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L543] COND FALSE !(p->h == 1) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L545] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L545] COND TRUE p->h != 3 VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L546] __VERIFIER_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21.5s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 16.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 938 SDtfs, 4005 SDslu, 8041 SDs, 0 SdLazy, 7072 SolverSat, 669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 510 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 11.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 778 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 784 NumberOfCodeBlocks, 784 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 710 ConstructedInterpolants, 0 QuantifiedInterpolants, 343822 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 26/103 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...