/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:01:41,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:01:41,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:01:41,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:01:41,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:01:41,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:01:41,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:01:41,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:01:41,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:01:41,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:01:41,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:01:41,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:01:41,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:01:41,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:01:41,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:01:41,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:01:41,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:01:41,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:01:41,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:01:41,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:01:41,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:01:41,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:01:41,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:01:41,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:01:41,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 12:01:41,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 12:01:41,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 12:01:41,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 12:01:41,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 12:01:41,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 12:01:41,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 12:01:41,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 12:01:41,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 12:01:41,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 12:01:41,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 12:01:41,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 12:01:41,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 12:01:41,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 12:01:41,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:01:41,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:01:41,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:01:41,757 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 [2020-07-17 12:01:41,772 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:01:41,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:01:41,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:01:41,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:01:41,774 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:01:41,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:01:41,774 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:01:41,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:01:41,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:01:41,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:01:41,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:01:41,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:01:41,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:01:41,776 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:01:41,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:01:41,776 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:01:41,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:01:41,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:01:41,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:01:41,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:01:41,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:01:41,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:01:41,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:01:41,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:01:41,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:01:41,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:01:41,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:01:41,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:01:41,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:01:41,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:01:42,074 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:01:42,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:01:42,091 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:01:42,093 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:01:42,093 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:01:42,094 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-07-17 12:01:42,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b37d9afd/a15bbf0dbee54276aae4f4e3d2dc82e2/FLAG85c0f45fe [2020-07-17 12:01:42,737 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:01:42,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i [2020-07-17 12:01:42,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b37d9afd/a15bbf0dbee54276aae4f4e3d2dc82e2/FLAG85c0f45fe [2020-07-17 12:01:43,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b37d9afd/a15bbf0dbee54276aae4f4e3d2dc82e2 [2020-07-17 12:01:43,035 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:01:43,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:01:43,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:01:43,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:01:43,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:01:43,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:01:43" (1/1) ... [2020-07-17 12:01:43,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128eb401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:43, skipping insertion in model container [2020-07-17 12:01:43,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:01:43" (1/1) ... [2020-07-17 12:01:43,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:01:43,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:01:43,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:01:43,548 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:01:43,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:01:43,657 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:01:43,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:43 WrapperNode [2020-07-17 12:01:43,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:01:43,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:01:43,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:01:43,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:01:43,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:43" (1/1) ... [2020-07-17 12:01:43,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:43" (1/1) ... [2020-07-17 12:01:43,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:43" (1/1) ... [2020-07-17 12:01:43,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:43" (1/1) ... [2020-07-17 12:01:43,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:43" (1/1) ... [2020-07-17 12:01:43,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:43" (1/1) ... [2020-07-17 12:01:43,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:43" (1/1) ... [2020-07-17 12:01:43,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:01:43,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:01:43,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:01:43,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:01:43,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:43" (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 [2020-07-17 12:01:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:01:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:01:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-17 12:01:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-17 12:01:43,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-17 12:01:43,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-17 12:01:43,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-17 12:01:43,818 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-17 12:01:43,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:01:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:01:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:01:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-17 12:01:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-17 12:01:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-17 12:01:43,819 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-17 12:01:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-17 12:01:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-17 12:01:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-17 12:01:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-17 12:01:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-17 12:01:43,820 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-17 12:01:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-17 12:01:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-17 12:01:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-17 12:01:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-17 12:01:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-17 12:01:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-17 12:01:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-17 12:01:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-17 12:01:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-17 12:01:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-17 12:01:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-17 12:01:43,822 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-17 12:01:43,823 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-17 12:01:43,823 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-17 12:01:43,823 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-17 12:01:43,823 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-17 12:01:43,823 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-17 12:01:43,823 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-17 12:01:43,824 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-17 12:01:43,824 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-17 12:01:43,824 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-17 12:01:43,824 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-17 12:01:43,824 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-17 12:01:43,824 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-17 12:01:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-17 12:01:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-17 12:01:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-17 12:01:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-17 12:01:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-17 12:01:43,825 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-17 12:01:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-17 12:01:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-17 12:01:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-17 12:01:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-17 12:01:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-17 12:01:43,826 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-17 12:01:43,827 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-17 12:01:43,827 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-17 12:01:43,827 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-17 12:01:43,827 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-17 12:01:43,827 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-17 12:01:43,827 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-17 12:01:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-17 12:01:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-17 12:01:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-17 12:01:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 12:01:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-17 12:01:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-17 12:01:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-17 12:01:43,829 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-17 12:01:43,829 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-17 12:01:43,829 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-17 12:01:43,829 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-17 12:01:43,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:01:43,829 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-17 12:01:43,830 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-17 12:01:43,830 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-17 12:01:43,830 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-17 12:01:43,830 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-17 12:01:43,830 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-17 12:01:43,830 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-17 12:01:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-17 12:01:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-17 12:01:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-17 12:01:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-17 12:01:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-17 12:01:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-17 12:01:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-17 12:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-17 12:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-17 12:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-17 12:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-17 12:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-17 12:01:43,832 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-17 12:01:43,833 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-17 12:01:43,833 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-17 12:01:43,833 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-17 12:01:43,833 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-17 12:01:43,833 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-17 12:01:43,833 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-17 12:01:43,833 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-17 12:01:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-17 12:01:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-17 12:01:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-17 12:01:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-17 12:01:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-17 12:01:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-17 12:01:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-17 12:01:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-17 12:01:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-17 12:01:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-17 12:01:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-17 12:01:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-17 12:01:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-17 12:01:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-17 12:01:43,836 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-17 12:01:43,836 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-17 12:01:43,836 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-17 12:01:43,836 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:01:43,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 12:01:43,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 12:01:43,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-17 12:01:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-17 12:01:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 12:01:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:01:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:01:43,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 12:01:44,216 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-17 12:01:44,399 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:01:44,399 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-17 12:01:44,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:01:44 BoogieIcfgContainer [2020-07-17 12:01:44,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:01:44,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:01:44,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:01:44,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:01:44,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:01:43" (1/3) ... [2020-07-17 12:01:44,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3604216b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:01:44, skipping insertion in model container [2020-07-17 12:01:44,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:01:43" (2/3) ... [2020-07-17 12:01:44,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3604216b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:01:44, skipping insertion in model container [2020-07-17 12:01:44,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:01:44" (3/3) ... [2020-07-17 12:01:44,417 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-07-17 12:01:44,429 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:01:44,449 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:01:44,460 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:01:44,479 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:01:44,479 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:01:44,480 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:01:44,480 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:01:44,480 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:01:44,480 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:01:44,480 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:01:44,481 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:01:44,500 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-17 12:01:44,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 12:01:44,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:44,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:01:44,508 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:44,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:44,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-07-17 12:01:44,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:44,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057971678] [2020-07-17 12:01:44,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:44,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057971678] [2020-07-17 12:01:44,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:44,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:01:44,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038427097] [2020-07-17 12:01:44,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:01:44,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:44,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:01:44,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:44,735 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-17 12:01:44,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:44,863 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-07-17 12:01:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:01:44,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-17 12:01:44,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:44,874 INFO L225 Difference]: With dead ends: 56 [2020-07-17 12:01:44,874 INFO L226 Difference]: Without dead ends: 25 [2020-07-17 12:01:44,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:01:44,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-17 12:01:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-17 12:01:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-17 12:01:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-17 12:01:44,922 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-07-17 12:01:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:44,922 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-17 12:01:44,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:01:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-17 12:01:44,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 12:01:44,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:44,924 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] [2020-07-17 12:01:44,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:01:44,925 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:44,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-07-17 12:01:44,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:44,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688060275] [2020-07-17 12:01:44,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:45,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688060275] [2020-07-17 12:01:45,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:45,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 12:01:45,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436271126] [2020-07-17 12:01:45,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:01:45,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:45,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:01:45,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:01:45,121 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-07-17 12:01:45,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:45,268 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-17 12:01:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:01:45,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-17 12:01:45,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:45,272 INFO L225 Difference]: With dead ends: 50 [2020-07-17 12:01:45,272 INFO L226 Difference]: Without dead ends: 46 [2020-07-17 12:01:45,273 INFO L675 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 [2020-07-17 12:01:45,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-17 12:01:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-07-17 12:01:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-17 12:01:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-07-17 12:01:45,283 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-07-17 12:01:45,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:45,283 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-07-17 12:01:45,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:01:45,284 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-07-17 12:01:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:01:45,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:45,285 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] [2020-07-17 12:01:45,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:01:45,285 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:45,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-07-17 12:01:45,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:45,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670296412] [2020-07-17 12:01:45,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:45,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670296412] [2020-07-17 12:01:45,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:45,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 12:01:45,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856801190] [2020-07-17 12:01:45,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:01:45,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:45,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:01:45,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:01:45,379 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-07-17 12:01:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:45,509 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-17 12:01:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:01:45,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-17 12:01:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:45,511 INFO L225 Difference]: With dead ends: 52 [2020-07-17 12:01:45,511 INFO L226 Difference]: Without dead ends: 44 [2020-07-17 12:01:45,511 INFO L675 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 [2020-07-17 12:01:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-17 12:01:45,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-07-17 12:01:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 12:01:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-07-17 12:01:45,518 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-07-17 12:01:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:45,519 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-07-17 12:01:45,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:01:45,519 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-07-17 12:01:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:01:45,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:45,520 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] [2020-07-17 12:01:45,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:01:45,521 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-07-17 12:01:45,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:45,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706612541] [2020-07-17 12:01:45,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:45,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706612541] [2020-07-17 12:01:45,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:01:45,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 12:01:45,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045854659] [2020-07-17 12:01:45,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:01:45,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:45,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:01:45,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:01:45,601 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-07-17 12:01:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:45,716 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-17 12:01:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:01:45,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-17 12:01:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:45,718 INFO L225 Difference]: With dead ends: 52 [2020-07-17 12:01:45,718 INFO L226 Difference]: Without dead ends: 41 [2020-07-17 12:01:45,719 INFO L675 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 [2020-07-17 12:01:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-17 12:01:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-07-17 12:01:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-17 12:01:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-17 12:01:45,724 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-07-17 12:01:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:45,725 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-17 12:01:45,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:01:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-17 12:01:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:01:45,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:45,726 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] [2020-07-17 12:01:45,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:01:45,727 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:45,727 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-07-17 12:01:45,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:45,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012077610] [2020-07-17 12:01:45,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:45,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012077610] [2020-07-17 12:01:45,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967353944] [2020-07-17 12:01:45,921 INFO L94 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 [2020-07-17 12:01:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:46,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-17 12:01:46,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:01:46,170 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 [2020-07-17 12:01:46,171 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:46,178 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:46,179 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:46,179 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-17 12:01:46,267 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:46,268 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 [2020-07-17 12:01:46,270 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:46,284 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:46,320 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 [2020-07-17 12:01:46,321 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:46,334 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:46,334 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:46,335 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-07-17 12:01:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:01:46,391 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 [2020-07-17 12:01:46,392 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:46,400 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:46,400 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:46,401 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-07-17 12:01:46,435 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 [2020-07-17 12:01:46,436 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:46,446 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:46,448 INFO L544 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. [2020-07-17 12:01:46,449 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-07-17 12:01:46,502 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 [2020-07-17 12:01:46,504 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:46,508 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:46,509 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:46,509 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-07-17 12:01:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:46,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:01:46,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-17 12:01:46,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594705019] [2020-07-17 12:01:46,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 12:01:46,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:46,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 12:01:46,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-07-17 12:01:46,519 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 14 states. [2020-07-17 12:01:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:46,864 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-17 12:01:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 12:01:46,867 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-07-17 12:01:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:46,868 INFO L225 Difference]: With dead ends: 54 [2020-07-17 12:01:46,868 INFO L226 Difference]: Without dead ends: 48 [2020-07-17 12:01:46,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:01:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-17 12:01:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-17 12:01:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-17 12:01:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-17 12:01:46,880 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2020-07-17 12:01:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:46,881 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-17 12:01:46,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 12:01:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-17 12:01:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:01:46,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:46,885 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] [2020-07-17 12:01:47,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:01:47,099 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:47,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-07-17 12:01:47,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:47,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834307460] [2020-07-17 12:01:47,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:47,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834307460] [2020-07-17 12:01:47,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952311106] [2020-07-17 12:01:47,201 INFO L94 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 [2020-07-17 12:01:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:47,288 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-17 12:01:47,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:01:47,300 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 [2020-07-17 12:01:47,301 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:47,310 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:47,311 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:47,311 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-17 12:01:47,351 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:47,352 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 [2020-07-17 12:01:47,352 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:47,361 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:47,368 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 [2020-07-17 12:01:47,369 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:47,383 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:47,383 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:47,383 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-07-17 12:01:47,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:01:47,417 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 [2020-07-17 12:01:47,418 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:47,424 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:47,424 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:47,425 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-07-17 12:01:47,451 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 [2020-07-17 12:01:47,452 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:47,459 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:47,461 INFO L544 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. [2020-07-17 12:01:47,461 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-07-17 12:01:47,500 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 [2020-07-17 12:01:47,501 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:47,505 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:47,506 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:47,507 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-07-17 12:01:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:47,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:01:47,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-17 12:01:47,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681631143] [2020-07-17 12:01:47,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 12:01:47,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:47,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 12:01:47,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-07-17 12:01:47,513 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 14 states. [2020-07-17 12:01:47,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:47,946 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-07-17 12:01:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 12:01:47,946 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-07-17 12:01:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:47,948 INFO L225 Difference]: With dead ends: 63 [2020-07-17 12:01:47,948 INFO L226 Difference]: Without dead ends: 59 [2020-07-17 12:01:47,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:01:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-17 12:01:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-07-17 12:01:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-17 12:01:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-07-17 12:01:47,956 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2020-07-17 12:01:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:47,956 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-07-17 12:01:47,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 12:01:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-07-17 12:01:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:01:47,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:47,957 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] [2020-07-17 12:01:48,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:01:48,160 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:48,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:48,161 INFO L82 PathProgramCache]: Analyzing trace with hash -562710342, now seen corresponding path program 1 times [2020-07-17 12:01:48,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:48,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089075046] [2020-07-17 12:01:48,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:48,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089075046] [2020-07-17 12:01:48,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208981248] [2020-07-17 12:01:48,308 INFO L94 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 [2020-07-17 12:01:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:48,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-17 12:01:48,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:01:48,425 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 [2020-07-17 12:01:48,426 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,430 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:48,431 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,431 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-17 12:01:48,452 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:48,452 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 [2020-07-17 12:01:48,453 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,462 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:48,462 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,463 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-07-17 12:01:48,478 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 [2020-07-17 12:01:48,478 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,490 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:48,496 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 [2020-07-17 12:01:48,497 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,505 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:48,506 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,506 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-07-17 12:01:48,523 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_22|], 2=[|v_#memory_$Pointer$.base_18|, |v_#memory_$Pointer$.offset_16|]} [2020-07-17 12:01:48,528 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 [2020-07-17 12:01:48,528 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,542 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:48,560 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:48,561 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 [2020-07-17 12:01:48,564 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-07-17 12:01:48,564 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:48,565 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,588 INFO L624 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-07-17 12:01:48,592 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 [2020-07-17 12:01:48,593 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,600 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:48,601 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,601 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-07-17 12:01:48,626 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 [2020-07-17 12:01:48,627 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,633 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:48,635 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 [2020-07-17 12:01:48,636 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,640 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:48,641 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,641 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-07-17 12:01:48,655 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 [2020-07-17 12:01:48,656 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,660 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:48,660 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:48,661 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-17 12:01:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:48,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:01:48,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-17 12:01:48,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669656764] [2020-07-17 12:01:48,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:01:48,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:48,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:01:48,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:01:48,668 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 11 states. [2020-07-17 12:01:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:48,995 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-07-17 12:01:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:01:48,995 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-07-17 12:01:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:48,996 INFO L225 Difference]: With dead ends: 67 [2020-07-17 12:01:48,996 INFO L226 Difference]: Without dead ends: 63 [2020-07-17 12:01:48,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-17 12:01:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-17 12:01:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-07-17 12:01:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-17 12:01:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-07-17 12:01:49,004 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2020-07-17 12:01:49,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:49,005 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-07-17 12:01:49,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:01:49,005 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-07-17 12:01:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:01:49,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:49,006 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] [2020-07-17 12:01:49,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:01:49,208 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:49,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:49,209 INFO L82 PathProgramCache]: Analyzing trace with hash 449917269, now seen corresponding path program 1 times [2020-07-17 12:01:49,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:49,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686622293] [2020-07-17 12:01:49,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:49,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686622293] [2020-07-17 12:01:49,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604706261] [2020-07-17 12:01:49,409 INFO L94 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 [2020-07-17 12:01:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:49,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-17 12:01:49,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:01:49,510 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 [2020-07-17 12:01:49,511 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,520 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:49,521 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,521 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-17 12:01:49,537 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:49,537 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 [2020-07-17 12:01:49,538 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,546 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:49,546 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-07-17 12:01:49,555 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 [2020-07-17 12:01:49,556 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,568 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:49,574 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 [2020-07-17 12:01:49,575 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,587 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:49,588 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,589 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-07-17 12:01:49,601 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_23|], 2=[|v_#memory_$Pointer$.offset_18|, |v_#memory_$Pointer$.base_20|]} [2020-07-17 12:01:49,607 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 [2020-07-17 12:01:49,607 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,621 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:49,625 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 86 treesize of output 68 [2020-07-17 12:01:49,626 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,636 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:49,657 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:49,658 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 59 treesize of output 85 [2020-07-17 12:01:49,659 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2020-07-17 12:01:49,660 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-17 12:01:49,660 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,676 INFO L624 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2020-07-17 12:01:49,677 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,677 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-07-17 12:01:49,704 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 [2020-07-17 12:01:49,705 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,710 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:49,713 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 [2020-07-17 12:01:49,713 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,718 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:49,719 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,719 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-07-17 12:01:49,724 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 [2020-07-17 12:01:49,725 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,726 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:49,726 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:49,727 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-17 12:01:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:49,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:01:49,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-07-17 12:01:49,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777191819] [2020-07-17 12:01:49,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 12:01:49,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 12:01:49,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-07-17 12:01:49,749 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 12 states. [2020-07-17 12:01:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:50,086 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-07-17 12:01:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:01:50,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-07-17 12:01:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:50,087 INFO L225 Difference]: With dead ends: 69 [2020-07-17 12:01:50,088 INFO L226 Difference]: Without dead ends: 59 [2020-07-17 12:01:50,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:01:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-17 12:01:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-07-17 12:01:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 12:01:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-07-17 12:01:50,095 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-07-17 12:01:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:50,095 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-07-17 12:01:50,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 12:01:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-07-17 12:01:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:01:50,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:50,098 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] [2020-07-17 12:01:50,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:01:50,299 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 2 times [2020-07-17 12:01:50,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:50,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910861353] [2020-07-17 12:01:50,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:50,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910861353] [2020-07-17 12:01:50,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845736723] [2020-07-17 12:01:50,436 INFO L92 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 [2020-07-17 12:01:50,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:01:50,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:01:50,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-17 12:01:50,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:01:50,579 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 [2020-07-17 12:01:50,580 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,584 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:50,584 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,584 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-17 12:01:50,598 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:50,599 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 [2020-07-17 12:01:50,600 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,606 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:50,607 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,607 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-07-17 12:01:50,615 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 [2020-07-17 12:01:50,616 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,626 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:50,631 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 [2020-07-17 12:01:50,632 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,642 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:50,643 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,644 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-07-17 12:01:50,655 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_24|], 2=[|v_#memory_$Pointer$.base_22|, |v_#memory_$Pointer$.offset_20|]} [2020-07-17 12:01:50,659 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 [2020-07-17 12:01:50,660 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,672 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:50,688 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:50,689 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 [2020-07-17 12:01:50,691 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-07-17 12:01:50,691 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:50,692 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,717 INFO L624 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-07-17 12:01:50,721 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 [2020-07-17 12:01:50,721 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,726 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:50,727 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,728 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-07-17 12:01:50,762 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 [2020-07-17 12:01:50,763 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,770 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:50,772 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 [2020-07-17 12:01:50,773 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,779 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:50,780 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,780 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-07-17 12:01:50,788 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 [2020-07-17 12:01:50,789 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,790 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:50,791 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:50,791 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-17 12:01:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:50,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:01:50,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-07-17 12:01:50,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355019305] [2020-07-17 12:01:50,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 12:01:50,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:50,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 12:01:50,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-07-17 12:01:50,813 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 12 states. [2020-07-17 12:01:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:51,104 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-17 12:01:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:01:51,105 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-07-17 12:01:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:51,106 INFO L225 Difference]: With dead ends: 62 [2020-07-17 12:01:51,106 INFO L226 Difference]: Without dead ends: 49 [2020-07-17 12:01:51,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:01:51,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-17 12:01:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-07-17 12:01:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-17 12:01:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-07-17 12:01:51,115 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-07-17 12:01:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:51,116 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-07-17 12:01:51,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 12:01:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-07-17 12:01:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:01:51,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:51,117 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] [2020-07-17 12:01:51,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:01:51,330 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:51,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:51,331 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-07-17 12:01:51,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:51,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733679203] [2020-07-17 12:01:51,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:51,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733679203] [2020-07-17 12:01:51,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135007386] [2020-07-17 12:01:51,517 INFO L92 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 [2020-07-17 12:01:51,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:01:51,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:01:51,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-17 12:01:51,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:01:51,630 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 [2020-07-17 12:01:51,631 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,634 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:51,635 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,635 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-17 12:01:51,670 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:51,671 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 [2020-07-17 12:01:51,672 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,700 INFO L624 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-07-17 12:01:51,706 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 [2020-07-17 12:01:51,707 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,719 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:51,720 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,720 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-07-17 12:01:51,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:01:51,758 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 [2020-07-17 12:01:51,759 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,767 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:51,768 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,768 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-07-17 12:01:51,809 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:51,810 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 [2020-07-17 12:01:51,811 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,825 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:51,832 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 [2020-07-17 12:01:51,833 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,844 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:51,844 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,845 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-07-17 12:01:51,886 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 1] term [2020-07-17 12:01:51,886 INFO L501 QuantifierPusher]: Distributing 1 conjuncts over 3 disjuncts [2020-07-17 12:01:51,902 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-17 12:01:51,903 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 [2020-07-17 12:01:51,904 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,913 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:51,915 INFO L544 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. [2020-07-17 12:01:51,916 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-07-17 12:01:51,960 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 [2020-07-17 12:01:51,961 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:51,973 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:51,976 INFO L544 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. [2020-07-17 12:01:51,977 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-07-17 12:01:52,021 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 [2020-07-17 12:01:52,021 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:52,055 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:52,056 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:52,056 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-07-17 12:01:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:52,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:01:52,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-07-17 12:01:52,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424291015] [2020-07-17 12:01:52,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 12:01:52,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:52,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 12:01:52,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-07-17 12:01:52,084 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 19 states. [2020-07-17 12:01:52,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:52,677 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-07-17 12:01:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 12:01:52,677 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-07-17 12:01:52,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:52,678 INFO L225 Difference]: With dead ends: 73 [2020-07-17 12:01:52,678 INFO L226 Difference]: Without dead ends: 65 [2020-07-17 12:01:52,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2020-07-17 12:01:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-17 12:01:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-07-17 12:01:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-17 12:01:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-07-17 12:01:52,684 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 28 [2020-07-17 12:01:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:52,685 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-07-17 12:01:52,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 12:01:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-07-17 12:01:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:01:52,686 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:52,686 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] [2020-07-17 12:01:52,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:01:52,897 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-07-17 12:01:52,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:52,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420275395] [2020-07-17 12:01:52,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:53,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420275395] [2020-07-17 12:01:53,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104569240] [2020-07-17 12:01:53,074 INFO L94 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 [2020-07-17 12:01:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:53,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-17 12:01:53,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:01:53,179 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 [2020-07-17 12:01:53,180 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,183 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:53,183 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,183 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-17 12:01:53,219 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:53,219 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 [2020-07-17 12:01:53,221 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,261 INFO L624 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-07-17 12:01:53,265 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 [2020-07-17 12:01:53,265 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,279 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:53,280 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,280 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-07-17 12:01:53,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:01:53,321 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 [2020-07-17 12:01:53,322 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,331 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:53,332 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,332 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-07-17 12:01:53,374 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:53,375 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 [2020-07-17 12:01:53,375 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,386 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:53,397 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 [2020-07-17 12:01:53,398 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,408 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:53,409 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,409 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-07-17 12:01:53,447 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 1] term [2020-07-17 12:01:53,447 INFO L501 QuantifierPusher]: Distributing 1 conjuncts over 3 disjuncts [2020-07-17 12:01:53,466 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-17 12:01:53,467 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 [2020-07-17 12:01:53,468 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,478 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:53,479 INFO L544 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. [2020-07-17 12:01:53,480 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-07-17 12:01:53,532 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 [2020-07-17 12:01:53,532 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,544 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:53,546 INFO L544 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. [2020-07-17 12:01:53,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-07-17 12:01:53,593 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 [2020-07-17 12:01:53,594 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,600 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:53,601 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:53,601 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-07-17 12:01:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:53,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:01:53,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-07-17 12:01:53,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426770945] [2020-07-17 12:01:53,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 12:01:53,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:53,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 12:01:53,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-07-17 12:01:53,633 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 19 states. [2020-07-17 12:01:54,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:54,363 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2020-07-17 12:01:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 12:01:54,364 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-07-17 12:01:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:54,366 INFO L225 Difference]: With dead ends: 93 [2020-07-17 12:01:54,366 INFO L226 Difference]: Without dead ends: 87 [2020-07-17 12:01:54,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-07-17 12:01:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-17 12:01:54,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2020-07-17 12:01:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-17 12:01:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-07-17 12:01:54,374 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 28 [2020-07-17 12:01:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:54,374 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-07-17 12:01:54,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 12:01:54,375 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-07-17 12:01:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 12:01:54,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:54,376 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] [2020-07-17 12:01:54,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:01:54,586 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash -794385695, now seen corresponding path program 3 times [2020-07-17 12:01:54,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:54,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030720573] [2020-07-17 12:01:54,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:01:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:54,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030720573] [2020-07-17 12:01:54,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041371270] [2020-07-17 12:01:54,860 INFO L92 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 [2020-07-17 12:01:54,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-17 12:01:54,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:01:54,963 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-17 12:01:54,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:01:54,977 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 [2020-07-17 12:01:54,978 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:54,979 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:54,979 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:54,980 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-17 12:01:55,031 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,031 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 [2020-07-17 12:01:55,032 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:01:55,035 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,056 INFO L624 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2020-07-17 12:01:55,057 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,057 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2020-07-17 12:01:55,093 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 13 treesize of output 9 [2020-07-17 12:01:55,093 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,109 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,114 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 13 treesize of output 9 [2020-07-17 12:01:55,115 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,126 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,127 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,127 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:59, output treesize:45 [2020-07-17 12:01:55,180 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,181 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 22 treesize of output 32 [2020-07-17 12:01:55,182 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:01:55,182 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:01:55,183 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,201 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,203 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_35|], 2=[|v_#memory_$Pointer$.base_28|, |v_#memory_$Pointer$.offset_22|]} [2020-07-17 12:01:55,207 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 [2020-07-17 12:01:55,208 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,226 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,261 INFO L350 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2020-07-17 12:01:55,262 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 45 treesize of output 31 [2020-07-17 12:01:55,263 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,297 INFO L624 ElimStorePlain]: treesize reduction 10, result has 84.1 percent of original size [2020-07-17 12:01:55,304 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 25 treesize of output 13 [2020-07-17 12:01:55,305 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,316 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,316 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,317 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:91, output treesize:38 [2020-07-17 12:01:55,380 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,380 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 172 treesize of output 160 [2020-07-17 12:01:55,382 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 3, 2, 1] term [2020-07-17 12:01:55,382 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-07-17 12:01:55,383 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,437 INFO L624 ElimStorePlain]: treesize reduction 34, result has 83.0 percent of original size [2020-07-17 12:01:55,444 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 142 treesize of output 108 [2020-07-17 12:01:55,445 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,463 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:01:55,469 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 69 treesize of output 23 [2020-07-17 12:01:55,469 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,483 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,484 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,485 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:176, output treesize:101 [2020-07-17 12:01:55,540 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_37|, |v_#memory_$Pointer$.offset_24|], 6=[|v_#memory_$Pointer$.base_30|]} [2020-07-17 12:01:55,548 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 67 treesize of output 48 [2020-07-17 12:01:55,549 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,571 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,596 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,596 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 233 treesize of output 215 [2020-07-17 12:01:55,598 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-17 12:01:55,599 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,659 INFO L624 ElimStorePlain]: treesize reduction 60, result has 74.4 percent of original size [2020-07-17 12:01:55,717 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,718 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 174 treesize of output 182 [2020-07-17 12:01:55,721 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-17 12:01:55,722 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,725 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-17 12:01:55,726 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:55,730 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,732 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-17 12:01:55,736 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-17 12:01:55,737 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-17 12:01:55,738 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,739 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-17 12:01:55,739 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:55,741 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,742 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-17 12:01:55,744 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-17 12:01:55,749 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,750 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-17 12:01:55,751 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:55,752 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,753 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-17 12:01:55,758 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-17 12:01:55,760 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,761 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-17 12:01:55,761 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:55,764 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,765 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-17 12:01:55,766 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-17 12:01:55,767 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,768 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-17 12:01:55,769 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:55,771 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,771 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-17 12:01:55,774 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-17 12:01:55,775 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,776 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-17 12:01:55,776 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:55,778 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,778 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-17 12:01:55,780 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-17 12:01:55,781 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-17 12:01:55,781 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,782 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-17 12:01:55,783 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:55,784 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,785 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-17 12:01:55,787 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-17 12:01:55,787 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,788 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-17 12:01:55,789 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:55,790 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,791 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-17 12:01:55,792 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-17 12:01:55,793 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,793 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-17 12:01:55,794 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:55,795 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,796 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-17 12:01:55,798 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-17 12:01:55,799 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,799 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-17 12:01:55,800 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:01:55,801 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-17 12:01:55,802 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-17 12:01:55,805 INFO L544 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-17 12:01:55,852 INFO L624 ElimStorePlain]: treesize reduction 108, result has 34.5 percent of original size [2020-07-17 12:01:55,853 INFO L544 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. [2020-07-17 12:01:55,853 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:265, output treesize:105 [2020-07-17 12:01:55,913 INFO L440 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.offset|], 2=[|#memory_$Pointer$.base|]} [2020-07-17 12:01:55,917 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 104 treesize of output 74 [2020-07-17 12:01:55,917 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:01:55,929 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,937 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:01:55,938 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 90 treesize of output 49 [2020-07-17 12:01:55,939 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-17 12:01:55,941 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-17 12:01:55,942 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-17 12:01:55,976 INFO L624 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2020-07-17 12:01:55,977 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-17 12:01:55,978 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:123, output treesize:19 [2020-07-17 12:01:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:01:56,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:01:56,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2020-07-17 12:01:56,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006470527] [2020-07-17 12:01:56,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-17 12:01:56,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:01:56,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-17 12:01:56,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-07-17 12:01:56,063 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 22 states. [2020-07-17 12:01:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:01:57,005 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2020-07-17 12:01:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 12:01:57,006 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-07-17 12:01:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:01:57,007 INFO L225 Difference]: With dead ends: 90 [2020-07-17 12:01:57,007 INFO L226 Difference]: Without dead ends: 84 [2020-07-17 12:01:57,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2020-07-17 12:01:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-17 12:01:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2020-07-17 12:01:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-17 12:01:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-07-17 12:01:57,015 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 30 [2020-07-17 12:01:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:01:57,016 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-07-17 12:01:57,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-17 12:01:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-07-17 12:01:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 12:01:57,017 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:01:57,017 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] [2020-07-17 12:01:57,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-17 12:01:57,231 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:01:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:01:57,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1568321631, now seen corresponding path program 1 times [2020-07-17 12:01:57,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:01:57,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86820315] [2020-07-17 12:01:57,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:01:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:01:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:01:57,304 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:01:57,304 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:01:57,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 12:01:57,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:01:57 BoogieIcfgContainer [2020-07-17 12:01:57,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:01:57,345 INFO L168 Benchmark]: Toolchain (without parser) took 14309.72 ms. Allocated memory was 134.7 MB in the beginning and 392.2 MB in the end (delta: 257.4 MB). Free memory was 98.0 MB in the beginning and 156.7 MB in the end (delta: -58.7 MB). Peak memory consumption was 198.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:57,346 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 134.7 MB. Free memory is still 117.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 12:01:57,346 INFO L168 Benchmark]: CACSL2BoogieTranslator took 620.55 ms. Allocated memory was 134.7 MB in the beginning and 198.7 MB in the end (delta: 64.0 MB). Free memory was 97.6 MB in the beginning and 165.0 MB in the end (delta: -67.4 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:57,347 INFO L168 Benchmark]: Boogie Preprocessor took 84.59 ms. Allocated memory is still 198.7 MB. Free memory was 165.0 MB in the beginning and 161.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:57,347 INFO L168 Benchmark]: RCFGBuilder took 660.43 ms. Allocated memory is still 198.7 MB. Free memory was 161.9 MB in the beginning and 116.9 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:57,348 INFO L168 Benchmark]: TraceAbstraction took 12938.47 ms. Allocated memory was 198.7 MB in the beginning and 392.2 MB in the end (delta: 193.5 MB). Free memory was 116.9 MB in the beginning and 156.7 MB in the end (delta: -39.9 MB). Peak memory consumption was 153.6 MB. Max. memory is 7.1 GB. [2020-07-17 12:01:57,349 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 134.7 MB. Free memory is still 117.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 620.55 ms. Allocated memory was 134.7 MB in the beginning and 198.7 MB in the end (delta: 64.0 MB). Free memory was 97.6 MB in the beginning and 165.0 MB in the end (delta: -67.4 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 84.59 ms. Allocated memory is still 198.7 MB. Free memory was 165.0 MB in the beginning and 161.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 660.43 ms. Allocated memory is still 198.7 MB. Free memory was 161.9 MB in the beginning and 116.9 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12938.47 ms. Allocated memory was 198.7 MB in the beginning and 392.2 MB in the end (delta: 193.5 MB). Free memory was 116.9 MB in the beginning and 156.7 MB in the end (delta: -39.9 MB). Peak memory consumption was 153.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L522] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L523] List t; [L524] List p = a; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L528] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L535] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-3:0}] [L541] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.8s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 250 SDtfs, 603 SDslu, 1371 SDs, 0 SdLazy, 2332 SolverSat, 263 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 395 GetRequests, 200 SyntacticMatches, 8 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred 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, 151 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 542 NumberOfCodeBlocks, 542 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 492 ConstructedInterpolants, 18 QuantifiedInterpolants, 141734 SizeOfPredicates, 107 NumberOfNonLiveVariables, 926 ConjunctsInSsa, 294 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...