/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:24:56,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:24:56,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:24:56,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:24:56,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:24:56,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:24:56,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:24:56,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:24:56,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:24:56,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:24:56,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:24:56,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:24:56,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:24:56,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:24:56,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:24:56,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:24:56,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:24:56,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:24:56,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:24:56,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:24:56,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:24:56,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:24:56,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:24:56,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:24:56,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:24:56,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:24:56,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:24:56,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:24:56,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:24:56,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:24:56,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:24:56,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:24:56,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:24:56,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:24:56,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:24:56,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:24:56,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:24:56,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:24:56,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:24:56,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:24:56,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:24:56,912 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:24:56,963 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:24:56,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:24:56,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:24:56,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:24:56,969 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:24:56,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:24:56,970 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:24:56,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:24:56,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:24:56,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:24:56,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:24:56,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:24:56,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:24:56,972 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:24:56,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:24:56,973 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:24:56,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:24:56,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:24:56,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:24:56,973 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:24:56,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:24:56,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:24:56,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:24:56,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:24:56,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:24:56,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:24:56,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:24:56,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:24:56,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:24:56,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:24:57,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:24:57,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:24:57,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:24:57,464 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:24:57,467 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:24:57,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-10-23 18:24:57,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c36daae/c02805b3276c423bb2006ca6a264282b/FLAG4113b16df [2020-10-23 18:24:58,320 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:24:58,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i [2020-10-23 18:24:58,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c36daae/c02805b3276c423bb2006ca6a264282b/FLAG4113b16df [2020-10-23 18:24:58,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c36daae/c02805b3276c423bb2006ca6a264282b [2020-10-23 18:24:58,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:24:58,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:24:58,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:24:58,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:24:58,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:24:58,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:24:58" (1/1) ... [2020-10-23 18:24:58,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419a5079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:58, skipping insertion in model container [2020-10-23 18:24:58,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:24:58" (1/1) ... [2020-10-23 18:24:58,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:24:58,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:24:59,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:24:59,150 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:24:59,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:24:59,320 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:24:59,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:59 WrapperNode [2020-10-23 18:24:59,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:24:59,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:24:59,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:24:59,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:24:59,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:59" (1/1) ... [2020-10-23 18:24:59,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:59" (1/1) ... [2020-10-23 18:24:59,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:59" (1/1) ... [2020-10-23 18:24:59,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:59" (1/1) ... [2020-10-23 18:24:59,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:59" (1/1) ... [2020-10-23 18:24:59,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:59" (1/1) ... [2020-10-23 18:24:59,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:59" (1/1) ... [2020-10-23 18:24:59,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:24:59,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:24:59,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:24:59,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:24:59,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:59" (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 [2020-10-23 18:24:59,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:24:59,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:24:59,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:24:59,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-23 18:24:59,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-23 18:24:59,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-23 18:24:59,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-23 18:24:59,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-23 18:24:59,542 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-23 18:24:59,542 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:24:59,543 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:24:59,543 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:24:59,543 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:24:59,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:24:59,545 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:24:59,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:24:59,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:24:59,546 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 18:24:59,546 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 18:24:59,546 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 18:24:59,547 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 18:24:59,547 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 18:24:59,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 18:24:59,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 18:24:59,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 18:24:59,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 18:24:59,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 18:24:59,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 18:24:59,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 18:24:59,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 18:24:59,549 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 18:24:59,549 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 18:24:59,549 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 18:24:59,549 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-23 18:24:59,549 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-23 18:24:59,550 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-23 18:24:59,550 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-23 18:24:59,550 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-23 18:24:59,550 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 18:24:59,550 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 18:24:59,550 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 18:24:59,551 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 18:24:59,551 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 18:24:59,551 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 18:24:59,551 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 18:24:59,551 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 18:24:59,551 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 18:24:59,551 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 18:24:59,552 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 18:24:59,552 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 18:24:59,552 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 18:24:59,552 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 18:24:59,552 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 18:24:59,553 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 18:24:59,553 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 18:24:59,554 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 18:24:59,554 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 18:24:59,554 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 18:24:59,555 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 18:24:59,555 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 18:24:59,555 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 18:24:59,555 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 18:24:59,556 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 18:24:59,556 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 18:24:59,556 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 18:24:59,556 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 18:24:59,557 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 18:24:59,557 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 18:24:59,557 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 18:24:59,557 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 18:24:59,557 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 18:24:59,558 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 18:24:59,558 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:24:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:24:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 18:24:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:24:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 18:24:59,559 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 18:24:59,560 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 18:24:59,560 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 18:24:59,560 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 18:24:59,561 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 18:24:59,561 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 18:24:59,562 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 18:24:59,562 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 18:24:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 18:24:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 18:24:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 18:24:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 18:24:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 18:24:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 18:24:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 18:24:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 18:24:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 18:24:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 18:24:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 18:24:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 18:24:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 18:24:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 18:24:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 18:24:59,565 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 18:24:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 18:24:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 18:24:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 18:24:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 18:24:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 18:24:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 18:24:59,566 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 18:24:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 18:24:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 18:24:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 18:24:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 18:24:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 18:24:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 18:24:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 18:24:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 18:24:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 18:24:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 18:24:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 18:24:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 18:24:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 18:24:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 18:24:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 18:24:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-23 18:24:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:24:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:24:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:24:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:24:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:24:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:24:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:24:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:24:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:24:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:25:00,098 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-23 18:25:00,252 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:25:00,253 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-23 18:25:00,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:25:00 BoogieIcfgContainer [2020-10-23 18:25:00,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:25:00,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:25:00,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:25:00,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:25:00,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:24:58" (1/3) ... [2020-10-23 18:25:00,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ce3c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:25:00, skipping insertion in model container [2020-10-23 18:25:00,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:24:59" (2/3) ... [2020-10-23 18:25:00,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ce3c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:25:00, skipping insertion in model container [2020-10-23 18:25:00,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:25:00" (3/3) ... [2020-10-23 18:25:00,278 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-10-23 18:25:00,292 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:25:00,297 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:25:00,312 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:25:00,341 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:25:00,341 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:25:00,341 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:25:00,341 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:25:00,341 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:25:00,342 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:25:00,342 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:25:00,342 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:25:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-23 18:25:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:25:00,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:00,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:25:00,369 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:00,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:00,375 INFO L82 PathProgramCache]: Analyzing trace with hash 620344659, now seen corresponding path program 1 times [2020-10-23 18:25:00,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:00,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829546412] [2020-10-23 18:25:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:00,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:00,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829546412] [2020-10-23 18:25:00,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:25:00,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:25:00,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975104916] [2020-10-23 18:25:00,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:25:00,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:00,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:25:00,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:25:00,671 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-23 18:25:00,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:00,814 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2020-10-23 18:25:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:25:00,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-23 18:25:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:00,825 INFO L225 Difference]: With dead ends: 63 [2020-10-23 18:25:00,825 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 18:25:00,829 INFO L677 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 [2020-10-23 18:25:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 18:25:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-23 18:25:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 18:25:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-23 18:25:00,873 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2020-10-23 18:25:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:00,874 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-23 18:25:00,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:25:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-23 18:25:00,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:25:00,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:00,876 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] [2020-10-23 18:25:00,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:25:00,876 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:00,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1278182859, now seen corresponding path program 1 times [2020-10-23 18:25:00,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:00,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116856161] [2020-10-23 18:25:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:01,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:01,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116856161] [2020-10-23 18:25:01,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:25:01,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:25:01,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747324520] [2020-10-23 18:25:01,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:25:01,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:01,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:25:01,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:25:01,084 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-10-23 18:25:01,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:01,285 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-23 18:25:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:25:01,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-23 18:25:01,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:01,290 INFO L225 Difference]: With dead ends: 53 [2020-10-23 18:25:01,290 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:25:01,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:25:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:25:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-10-23 18:25:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:25:01,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-23 18:25:01,302 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 22 [2020-10-23 18:25:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:01,303 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-23 18:25:01,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:25:01,303 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-23 18:25:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:25:01,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:01,304 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] [2020-10-23 18:25:01,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:25:01,305 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:01,306 INFO L82 PathProgramCache]: Analyzing trace with hash -511611450, now seen corresponding path program 1 times [2020-10-23 18:25:01,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:01,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115958015] [2020-10-23 18:25:01,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:01,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:01,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115958015] [2020-10-23 18:25:01,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:25:01,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:25:01,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171278906] [2020-10-23 18:25:01,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:25:01,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:01,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:25:01,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:25:01,432 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-10-23 18:25:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:01,648 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-23 18:25:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:25:01,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-23 18:25:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:01,651 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:25:01,651 INFO L226 Difference]: Without dead ends: 45 [2020-10-23 18:25:01,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:25:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-23 18:25:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2020-10-23 18:25:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:25:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-23 18:25:01,672 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 24 [2020-10-23 18:25:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:01,673 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-23 18:25:01,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:25:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-23 18:25:01,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:25:01,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:01,676 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] [2020-10-23 18:25:01,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:25:01,676 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:01,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:01,677 INFO L82 PathProgramCache]: Analyzing trace with hash 680437702, now seen corresponding path program 1 times [2020-10-23 18:25:01,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:01,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163601122] [2020-10-23 18:25:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:01,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:01,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163601122] [2020-10-23 18:25:01,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:25:01,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:25:01,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670351888] [2020-10-23 18:25:01,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:25:01,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:01,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:25:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:25:01,843 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-10-23 18:25:01,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:01,992 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-23 18:25:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:25:01,992 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-23 18:25:01,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:01,994 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:25:01,994 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 18:25:01,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:25:01,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 18:25:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-23 18:25:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 18:25:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-23 18:25:02,001 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-10-23 18:25:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:02,002 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-23 18:25:02,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:25:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-23 18:25:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:25:02,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:02,003 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] [2020-10-23 18:25:02,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:25:02,003 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:02,004 INFO L82 PathProgramCache]: Analyzing trace with hash 134346418, now seen corresponding path program 1 times [2020-10-23 18:25:02,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:02,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579061621] [2020-10-23 18:25:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:02,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:02,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579061621] [2020-10-23 18:25:02,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482821582] [2020-10-23 18:25:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:02,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-23 18:25:02,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:25:02,465 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-23 18:25:02,465 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:02,473 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:02,474 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:02,474 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-23 18:25:02,547 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:02,548 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-10-23 18:25:02,549 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:02,562 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:02,570 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:02,571 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:02,583 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:02,584 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:02,584 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-10-23 18:25:02,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:25:02,631 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-10-23 18:25:02,632 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:02,640 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:02,641 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:02,641 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-10-23 18:25:02,693 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-10-23 18:25:02,695 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:02,705 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:02,708 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 18:25:02,708 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-10-23 18:25:02,764 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-10-23 18:25:02,767 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:02,773 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:02,775 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:02,776 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-10-23 18:25:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:02,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:25:02,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-10-23 18:25:02,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535137047] [2020-10-23 18:25:02,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:25:02,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:02,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:25:02,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:25:02,783 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 14 states. [2020-10-23 18:25:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:03,216 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-23 18:25:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:25:03,217 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-23 18:25:03,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:03,219 INFO L225 Difference]: With dead ends: 57 [2020-10-23 18:25:03,219 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 18:25:03,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:25:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 18:25:03,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-23 18:25:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:25:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-23 18:25:03,229 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 26 [2020-10-23 18:25:03,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:03,229 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-23 18:25:03,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:25:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-23 18:25:03,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:25:03,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:03,231 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] [2020-10-23 18:25:03,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:03,447 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:03,448 INFO L82 PathProgramCache]: Analyzing trace with hash 934657394, now seen corresponding path program 1 times [2020-10-23 18:25:03,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:03,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514838584] [2020-10-23 18:25:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:03,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:03,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514838584] [2020-10-23 18:25:03,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115517785] [2020-10-23 18:25:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:03,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-23 18:25:03,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:25:03,736 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-23 18:25:03,737 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:03,742 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:03,743 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:03,743 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-23 18:25:03,797 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:03,798 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-10-23 18:25:03,799 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:03,810 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:03,816 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:03,816 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:03,828 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:03,828 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:03,829 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-10-23 18:25:03,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:25:03,864 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-10-23 18:25:03,864 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:03,871 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:03,872 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:03,872 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-10-23 18:25:03,907 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-10-23 18:25:03,908 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:03,917 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:03,919 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 18:25:03,920 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-10-23 18:25:03,991 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-10-23 18:25:03,993 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:03,999 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:04,001 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:04,002 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-10-23 18:25:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:04,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:25:04,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-10-23 18:25:04,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217366020] [2020-10-23 18:25:04,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:25:04,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:04,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:25:04,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:25:04,008 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 14 states. [2020-10-23 18:25:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:04,487 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-23 18:25:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:25:04,489 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-23 18:25:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:04,490 INFO L225 Difference]: With dead ends: 66 [2020-10-23 18:25:04,490 INFO L226 Difference]: Without dead ends: 60 [2020-10-23 18:25:04,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:25:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-23 18:25:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-10-23 18:25:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 18:25:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-23 18:25:04,500 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 26 [2020-10-23 18:25:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:04,500 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-23 18:25:04,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:25:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-23 18:25:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:25:04,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:04,501 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] [2020-10-23 18:25:04,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:04,715 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:04,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:04,716 INFO L82 PathProgramCache]: Analyzing trace with hash 965245677, now seen corresponding path program 1 times [2020-10-23 18:25:04,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:04,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384301018] [2020-10-23 18:25:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:04,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:04,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384301018] [2020-10-23 18:25:04,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309919092] [2020-10-23 18:25:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:05,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-23 18:25:05,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:25:05,227 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-23 18:25:05,227 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,232 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:05,233 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,233 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-23 18:25:05,256 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:05,256 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-10-23 18:25:05,257 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,273 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:05,274 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,274 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-10-23 18:25:05,291 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:05,291 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,308 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:05,315 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:05,315 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,328 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:05,330 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,330 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-10-23 18:25:05,348 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_23|], 2=[|v_#memory_$Pointer$.base_18|, |v_#memory_$Pointer$.offset_16|]} [2020-10-23 18:25:05,354 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-10-23 18:25:05,354 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,373 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:05,398 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:05,399 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-10-23 18:25:05,403 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-10-23 18:25:05,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-10-23 18:25:05,405 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,435 INFO L625 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-10-23 18:25:05,440 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-10-23 18:25:05,441 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,449 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:05,450 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,450 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-10-23 18:25:05,488 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-10-23 18:25:05,489 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,498 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:05,502 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-10-23 18:25:05,503 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,510 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:05,512 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,512 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-10-23 18:25:05,518 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-23 18:25:05,519 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,521 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:05,522 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:05,522 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-10-23 18:25:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:05,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:25:05,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-23 18:25:05,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136615873] [2020-10-23 18:25:05,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:25:05,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:25:05,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:25:05,529 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 11 states. [2020-10-23 18:25:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:05,973 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-23 18:25:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:25:05,974 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-23 18:25:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:05,976 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:25:05,976 INFO L226 Difference]: Without dead ends: 64 [2020-10-23 18:25:05,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:25:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-23 18:25:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-10-23 18:25:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:25:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-23 18:25:05,986 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 28 [2020-10-23 18:25:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:05,986 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-23 18:25:05,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:25:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-23 18:25:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:25:05,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:05,987 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] [2020-10-23 18:25:06,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:06,201 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:06,202 INFO L82 PathProgramCache]: Analyzing trace with hash -596532632, now seen corresponding path program 1 times [2020-10-23 18:25:06,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:06,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705884769] [2020-10-23 18:25:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:06,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:06,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705884769] [2020-10-23 18:25:06,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239598216] [2020-10-23 18:25:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:06,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-23 18:25:06,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:25:06,657 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-23 18:25:06,657 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,665 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:06,665 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,666 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-23 18:25:06,689 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:06,690 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-10-23 18:25:06,690 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,699 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:06,699 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,700 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-10-23 18:25:06,712 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:06,712 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,725 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:06,730 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:06,731 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,743 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:06,745 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,745 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-10-23 18:25:06,759 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_24|], 2=[|v_#memory_$Pointer$.base_20|, |v_#memory_$Pointer$.offset_18|]} [2020-10-23 18:25:06,765 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-10-23 18:25:06,765 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,779 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:06,799 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:06,800 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-10-23 18:25:06,804 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-10-23 18:25:06,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-10-23 18:25:06,805 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,830 INFO L625 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-10-23 18:25:06,836 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-10-23 18:25:06,837 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,844 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:06,845 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,845 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-10-23 18:25:06,881 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-10-23 18:25:06,882 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,890 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:06,896 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-10-23 18:25:06,896 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,902 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:06,904 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,905 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-10-23 18:25:06,925 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-23 18:25:06,925 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,928 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:06,928 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:06,928 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-10-23 18:25:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:06,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:25:06,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-10-23 18:25:06,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318809057] [2020-10-23 18:25:06,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:25:06,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:06,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:25:06,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:25:06,964 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 12 states. [2020-10-23 18:25:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:07,401 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-23 18:25:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:25:07,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-23 18:25:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:07,403 INFO L225 Difference]: With dead ends: 72 [2020-10-23 18:25:07,403 INFO L226 Difference]: Without dead ends: 60 [2020-10-23 18:25:07,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:25:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-23 18:25:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-23 18:25:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:25:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-23 18:25:07,422 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2020-10-23 18:25:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:07,422 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-23 18:25:07,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:25:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-23 18:25:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:25:07,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:07,426 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:25:07,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:07,628 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:07,629 INFO L82 PathProgramCache]: Analyzing trace with hash 595516520, now seen corresponding path program 2 times [2020-10-23 18:25:07,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:07,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680394781] [2020-10-23 18:25:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:07,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:07,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680394781] [2020-10-23 18:25:07,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391946791] [2020-10-23 18:25:07,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:08,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:25:08,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:25:08,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-23 18:25:08,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:25:08,025 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-23 18:25:08,026 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:08,031 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,031 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-23 18:25:08,049 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:08,050 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-10-23 18:25:08,051 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,059 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:08,059 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,059 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-10-23 18:25:08,082 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:08,082 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,096 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:08,101 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:08,104 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,118 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:08,120 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,120 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-10-23 18:25:08,144 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_25|], 2=[|v_#memory_$Pointer$.base_22|, |v_#memory_$Pointer$.offset_20|]} [2020-10-23 18:25:08,153 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-10-23 18:25:08,153 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,176 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:08,199 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:08,199 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-10-23 18:25:08,202 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-10-23 18:25:08,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-10-23 18:25:08,205 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,228 INFO L625 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-10-23 18:25:08,232 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-10-23 18:25:08,235 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,242 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:08,243 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,243 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-10-23 18:25:08,278 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-10-23 18:25:08,279 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:08,291 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-10-23 18:25:08,291 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,298 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:08,300 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,300 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-10-23 18:25:08,308 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-23 18:25:08,308 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,311 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:08,311 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:08,311 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-10-23 18:25:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:08,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:25:08,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-10-23 18:25:08,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076764397] [2020-10-23 18:25:08,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:25:08,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:08,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:25:08,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:25:08,338 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 12 states. [2020-10-23 18:25:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:08,716 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-23 18:25:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:25:08,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-23 18:25:08,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:08,717 INFO L225 Difference]: With dead ends: 65 [2020-10-23 18:25:08,718 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:25:08,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:25:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:25:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-23 18:25:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 18:25:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-23 18:25:08,724 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 30 [2020-10-23 18:25:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:08,725 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-23 18:25:08,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:25:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-23 18:25:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:25:08,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:08,726 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:25:08,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:08,940 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1043096551, now seen corresponding path program 2 times [2020-10-23 18:25:08,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:08,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129372440] [2020-10-23 18:25:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:09,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:09,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129372440] [2020-10-23 18:25:09,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435663451] [2020-10-23 18:25:09,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:09,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:25:09,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:25:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-23 18:25:09,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:25:09,422 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-23 18:25:09,422 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,426 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:09,426 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,427 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-23 18:25:09,456 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:09,457 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-10-23 18:25:09,458 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,499 INFO L625 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-10-23 18:25:09,505 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:09,505 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,527 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:09,527 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,528 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-10-23 18:25:09,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:25:09,571 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-10-23 18:25:09,572 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,585 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:09,585 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,585 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-10-23 18:25:09,648 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:09,648 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-10-23 18:25:09,649 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,662 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:09,667 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-10-23 18:25:09,668 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,682 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:09,683 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,683 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-10-23 18:25:09,742 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-10-23 18:25:09,743 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-10-23 18:25:09,744 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,759 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:09,761 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 18:25:09,762 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-10-23 18:25:09,871 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-10-23 18:25:09,872 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,886 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:09,891 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-23 18:25:09,892 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-10-23 18:25:09,955 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-10-23 18:25:09,957 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,966 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:09,970 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:09,971 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-10-23 18:25:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:09,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:25:09,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-10-23 18:25:09,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86774091] [2020-10-23 18:25:09,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:25:09,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:09,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:25:09,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:25:09,998 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 19 states. [2020-10-23 18:25:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:12,813 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-23 18:25:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:25:12,814 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-23 18:25:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:12,815 INFO L225 Difference]: With dead ends: 76 [2020-10-23 18:25:12,815 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 18:25:12,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2020-10-23 18:25:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 18:25:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2020-10-23 18:25:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 18:25:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-23 18:25:12,834 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 30 [2020-10-23 18:25:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:12,835 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-23 18:25:12,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:25:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-23 18:25:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:25:12,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:12,836 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] [2020-10-23 18:25:13,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:13,053 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:13,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:13,055 INFO L82 PathProgramCache]: Analyzing trace with hash -792329511, now seen corresponding path program 1 times [2020-10-23 18:25:13,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:13,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644275219] [2020-10-23 18:25:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:13,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:13,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644275219] [2020-10-23 18:25:13,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946678970] [2020-10-23 18:25:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:13,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-23 18:25:13,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:25:13,538 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-23 18:25:13,539 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,543 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:13,544 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,544 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-23 18:25:13,573 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:13,574 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-10-23 18:25:13,575 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,611 INFO L625 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-10-23 18:25:13,616 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:13,616 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,630 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:13,631 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,631 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-10-23 18:25:13,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:25:13,671 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-10-23 18:25:13,671 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,681 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:13,682 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,682 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-10-23 18:25:13,728 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:13,728 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-10-23 18:25:13,729 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,742 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:13,747 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-10-23 18:25:13,747 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,761 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:13,762 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,762 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-10-23 18:25:13,823 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-10-23 18:25:13,823 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-10-23 18:25:13,824 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,838 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:13,840 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 18:25:13,840 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-10-23 18:25:13,919 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-10-23 18:25:13,920 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:13,935 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:13,938 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-23 18:25:13,939 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-10-23 18:25:14,023 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-10-23 18:25:14,024 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:14,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:14,033 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:14,034 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-10-23 18:25:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:14,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:25:14,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-10-23 18:25:14,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418816213] [2020-10-23 18:25:14,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:25:14,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:14,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:25:14,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:25:14,064 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 19 states. [2020-10-23 18:25:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:14,940 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-10-23 18:25:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:25:14,942 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-23 18:25:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:14,944 INFO L225 Difference]: With dead ends: 96 [2020-10-23 18:25:14,944 INFO L226 Difference]: Without dead ends: 88 [2020-10-23 18:25:14,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-10-23 18:25:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-23 18:25:14,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-10-23 18:25:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:25:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-23 18:25:14,965 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 30 [2020-10-23 18:25:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:14,965 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-23 18:25:14,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:25:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-23 18:25:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:25:14,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:14,969 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-23 18:25:15,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:15,170 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:15,171 INFO L82 PathProgramCache]: Analyzing trace with hash -981048684, now seen corresponding path program 3 times [2020-10-23 18:25:15,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:15,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929427497] [2020-10-23 18:25:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:15,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:15,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929427497] [2020-10-23 18:25:15,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182012652] [2020-10-23 18:25:15,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:25:15,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-23 18:25:15,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:25:15,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 50 conjunts are in the unsatisfiable core [2020-10-23 18:25:15,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:25:15,712 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-23 18:25:15,712 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:15,717 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:15,717 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:15,717 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-23 18:25:15,746 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:15,747 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-10-23 18:25:15,747 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:15,777 INFO L625 ElimStorePlain]: treesize reduction 14, result has 63.2 percent of original size [2020-10-23 18:25:15,778 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:15,778 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2020-10-23 18:25:15,818 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:15,818 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:15,836 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:15,842 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:15,842 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:15,859 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:15,861 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:15,861 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2020-10-23 18:25:15,919 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:15,919 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 30 [2020-10-23 18:25:15,920 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:15,944 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:15,946 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_36|], 2=[|v_#memory_$Pointer$.offset_22|, |v_#memory_$Pointer$.base_28|]} [2020-10-23 18:25:15,952 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-23 18:25:15,952 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:15,980 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:15,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:25:15,986 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-10-23 18:25:15,987 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,007 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:16,038 INFO L350 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2020-10-23 18:25:16,038 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2020-10-23 18:25:16,039 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,075 INFO L625 ElimStorePlain]: treesize reduction 8, result has 82.2 percent of original size [2020-10-23 18:25:16,076 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,076 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:86, output treesize:37 [2020-10-23 18:25:16,144 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 100 [2020-10-23 18:25:16,145 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,174 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:16,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:25:16,181 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2020-10-23 18:25:16,181 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,202 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:16,227 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:16,228 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 105 [2020-10-23 18:25:16,231 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[8, 3, 2, 1] term [2020-10-23 18:25:16,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-10-23 18:25:16,235 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,277 INFO L625 ElimStorePlain]: treesize reduction 26, result has 77.6 percent of original size [2020-10-23 18:25:16,278 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,278 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:145, output treesize:84 [2020-10-23 18:25:16,333 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_24|, |v_#memory_int_38|], 6=[|v_#memory_$Pointer$.base_30|]} [2020-10-23 18:25:16,358 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:16,358 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 199 [2020-10-23 18:25:16,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,362 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,408 INFO L625 ElimStorePlain]: treesize reduction 48, result has 77.3 percent of original size [2020-10-23 18:25:16,414 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 40 [2020-10-23 18:25:16,415 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,435 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:16,493 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:16,493 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 160 [2020-10-23 18:25:16,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,499 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,501 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,505 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-10-23 18:25:16,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,510 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,510 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,517 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,517 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,521 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,522 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,527 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,528 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,532 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,533 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,538 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,538 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,540 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-10-23 18:25:16,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,543 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,545 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,552 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,553 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,557 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,558 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,564 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,565 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-23 18:25:16,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-10-23 18:25:16,569 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-10-23 18:25:16,569 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-23 18:25:16,571 INFO L545 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 18:25:16,629 INFO L625 ElimStorePlain]: treesize reduction 92, result has 37.0 percent of original size [2020-10-23 18:25:16,631 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:25:16,631 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:220, output treesize:88 [2020-10-23 18:25:16,723 INFO L441 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.offset|], 2=[|#memory_$Pointer$.base|]} [2020-10-23 18:25:16,727 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 64 [2020-10-23 18:25:16,729 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,743 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:16,752 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:16,753 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 47 [2020-10-23 18:25:16,754 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-10-23 18:25:16,756 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-10-23 18:25:16,757 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:25:16,783 INFO L625 ElimStorePlain]: treesize reduction 14, result has 65.9 percent of original size [2020-10-23 18:25:16,784 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 18:25:16,785 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:99, output treesize:19 [2020-10-23 18:25:16,838 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-10-23 18:25:16,839 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,845 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:25:16,846 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:25:16,846 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2020-10-23 18:25:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:16,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:25:16,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2020-10-23 18:25:16,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315170476] [2020-10-23 18:25:16,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:25:16,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:16,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:25:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:25:16,857 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 19 states. [2020-10-23 18:25:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:17,670 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-10-23 18:25:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:25:17,671 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-10-23 18:25:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:17,672 INFO L225 Difference]: With dead ends: 92 [2020-10-23 18:25:17,672 INFO L226 Difference]: Without dead ends: 84 [2020-10-23 18:25:17,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:25:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-23 18:25:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2020-10-23 18:25:17,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-23 18:25:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-10-23 18:25:17,694 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 32 [2020-10-23 18:25:17,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:17,695 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-10-23 18:25:17,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:25:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-10-23 18:25:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:25:17,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:17,701 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] [2020-10-23 18:25:17,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-23 18:25:17,917 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:17,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1704140972, now seen corresponding path program 1 times [2020-10-23 18:25:17,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:17,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749714072] [2020-10-23 18:25:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:25:17,956 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:25:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:25:17,972 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:25:18,016 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:25:18,016 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:25:18,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 18:25:18,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:25:18 BoogieIcfgContainer [2020-10-23 18:25:18,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:25:18,096 INFO L168 Benchmark]: Toolchain (without parser) took 19473.29 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 125.4 MB in the beginning and 118.6 MB in the end (delta: 6.8 MB). Peak memory consumption was 118.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:25:18,096 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory was 100.9 MB in the beginning and 100.8 MB in the end (delta: 69.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:25:18,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 689.68 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 102.6 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:25:18,097 INFO L168 Benchmark]: Boogie Preprocessor took 101.87 ms. Allocated memory is still 151.0 MB. Free memory was 102.6 MB in the beginning and 133.0 MB in the end (delta: -30.4 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:25:18,099 INFO L168 Benchmark]: RCFGBuilder took 830.61 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 90.7 MB in the end (delta: 41.9 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:25:18,099 INFO L168 Benchmark]: TraceAbstraction took 17837.69 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 90.2 MB in the beginning and 118.6 MB in the end (delta: -28.3 MB). Peak memory consumption was 82.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:25:18,101 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory was 100.9 MB in the beginning and 100.8 MB in the end (delta: 69.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 689.68 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 102.6 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 101.87 ms. Allocated memory is still 151.0 MB. Free memory was 102.6 MB in the beginning and 133.0 MB in the end (delta: -30.4 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 830.61 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 90.7 MB in the end (delta: 41.9 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17837.69 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 90.2 MB in the beginning and 118.6 MB in the end (delta: -28.3 MB). Peak memory consumption was 82.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L533] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L536] COND TRUE __VERIFIER_nondet_int() [L537] p->h = 1 [L538] 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}] [L539] 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}] [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND TRUE __VERIFIER_nondet_int() [L544] p->h = 2 [L545] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L546] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, t={-3:0}] [L552] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L552] COND FALSE !(p->h == 2) [L554] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L554] COND TRUE p->h == 1 [L555] EXPR p->n [L555] p = p->n [L554] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L556] COND TRUE p->h != 3 [L557] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.6s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 274 SDtfs, 588 SDslu, 1349 SDs, 0 SdLazy, 2504 SolverSat, 272 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 409 GetRequests, 218 SyntacticMatches, 9 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 139 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 584 NumberOfCodeBlocks, 584 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 532 ConstructedInterpolants, 17 QuantifiedInterpolants, 155198 SizeOfPredicates, 113 NumberOfNonLiveVariables, 1238 ConjunctsInSsa, 299 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 16/92 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...